CN105185322A - Control method and control device for screen backlight source, and display device - Google Patents
Control method and control device for screen backlight source, and display device Download PDFInfo
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- CN105185322A CN105185322A CN201510537609.7A CN201510537609A CN105185322A CN 105185322 A CN105185322 A CN 105185322A CN 201510537609 A CN201510537609 A CN 201510537609A CN 105185322 A CN105185322 A CN 105185322A
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Abstract
The invention provides a control method and a control device for a screen backlight source, and a display device. A screen comprises a plurality of display regions. The control method aimed at any display region of the screen comprises: determining all possible configuration data for each pixel in the display region to reach preset luminance required by a to-be-displayed frame, the configuration data comprising backlight current and gray scale voltage; using the configuration data of each pixel in the display region, aimed at the backlight current in the same value, as a candidate configuration scheme of the display region; calculating output power consumption of the display region aimed at each candidate configuration scheme; and using the candidate configuration scheme which has the lowest output power consumption as the final configuration scheme of the display region in the to-be-displayed frame. The method determines the configuration data in lowest power consumption in the display region from three dimensions of luminance, backlight current, and gray scale voltage.
Description
Technical field
The present invention relates to field of screen display, particularly a kind of control method of screen back light source, control device and display device.
Background technology
In current liquid crystal display, screen divider has multiple backlight, and each backlight is responsible for the brightness of a viewing area.A backlight can only export a kind of back facet current, and the back facet current of all pixels of the viewing area that therefore backlight is corresponding is required identical.And in picture procedure for displaying, the brightness of each pixel of a viewing area is different, brightness is determined by back facet current and gray scale voltage two factors, although back facet current must be identical between the pixel of therefore same viewing area, gray scale voltage also exists difference.
For reducing power consumption of screen, need to determine the configuration data of screen at picture to be shown in advance.Prior art is under all pixels in a viewing area all meet the prerequisite of brightness, chooses value minimum and can meet the drive arrangements of back facet current as backlight of all pixels.But back facet current is minimum, might not mean that the power consumption of the actual output in viewing area is minimum, this is because the output power consumption of viewing area comprises: the backlight power consumption determined by back facet current and the logical drive power consumption determined by pixel gray level voltage, and as prior art, only choose minimum backlight electric current and obviously truly can not reflect the output power consumption that viewing area is minimum.
Summary of the invention
The object of this invention is to provide a kind of control method of screen back light source, control device and display device, under can ensureing that display frame reaches brightness prerequisite, carry out work according to the configuration of minimum power consumption.
For achieving the above object, embodiments of the invention provide a kind of control method of screen back light source, and described screen includes multiple viewing area, it is characterized in that, the control method for the arbitrary viewing area of described screen comprises:
Determine that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Using each pixel in described viewing area for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
Calculate the output power consumption of described viewing area for each candidate's allocation plan;
To the minimum candidate's allocation plan of power consumption be exported as described viewing area at the allocation plan that described frame to be shown is final.
Wherein, described control method also comprises:
In described frame to be shown, according to the configuration data of each pixel in the described viewing area that described final allocation plan is corresponding, the corresponding each pixel driven in described viewing area.
Wherein, calculate the output power consumption of described viewing area for each candidate's allocation plan, comprising:
According to the back facet current in candidate's allocation plan that described display area is corresponding, calculate the backlight power consumption of described viewing area;
According to the gray scale voltage of each pixel in candidate's allocation plan that described display area is corresponding, calculate the logical drive power consumption of described viewing area;
The backlight power consumption of candidate's allocation plan corresponding for described display area is added with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
Wherein, the backlight power consumption P of described viewing area
light=I*V
light/ η
light; I is the back facet current of described viewing area, V
lightfor the lamp bar voltage of viewing area, η
lightfor the lamp bar work efficiency of viewing area;
The logical drive power consumption P of described viewing area
logic=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
d-IC (n)+ P
loss]/η
power; Wherein, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-IC (1)to P
d-IC (N)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; p
lossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
In addition, another embodiment of the present invention also provides a kind for the treatment of apparatus of screen back light source, is applied to one of them viewing area of described screen, comprises:
First processing module, for determining that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Second processing module, for using each pixel for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
3rd processing module, for calculating the output power consumption of described viewing area for each candidate's allocation plan;
4th processing module, will export the minimum candidate's allocation plan of power consumption as described viewing area at the allocation plan that described frame to be shown is final.
Wherein, described treating apparatus also comprises:
Driver module, in described frame to be shown, according to the configuration data of each pixel in the described viewing area that described final allocation plan is corresponding, the corresponding each pixel driven in described viewing area.
Wherein, described 3rd processing module comprises:
First computing unit, for according to the back facet current in candidate's allocation plan corresponding to described display area, calculates the backlight power consumption of described viewing area;
Second computing unit, for the gray scale voltage according to each pixel in candidate's allocation plan corresponding to described display area, calculates the logical drive power consumption of described viewing area;
3rd computing unit, for the backlight power consumption of candidate's allocation plan corresponding for described display area being added with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
The backlight power consumption P of described viewing area
light=I*V
light/ η
light; Wherein, I is the back facet current of described viewing area, V
lightfor the lamp bar voltage of viewing area, η
lightfor the lamp bar work efficiency of viewing area;
The logical drive power consumption P of described viewing area
logic=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
d-IC (n)+ P
lossi/ η
power; Wherein, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-ic (1)to P
d-IC (n)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; P
tossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
In addition, another embodiment of the present invention also provides a kind of display device comprising above-mentioned control device.
The beneficial effect of technique scheme of the present invention is as follows:
To meet premised on brightness in the scheme of invention, first determine all back facet currents that can export of the backlight of viewing area, for each back facet current that can export, in conjunction with the gray scale voltage that each pixel is corresponding, determine the true power consumption of viewing area, thus the allocation plan of the minimum power consumption of a viewing area is accurately provided.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the control method of screen back light source of the present invention;
Fig. 2 is the control method schematic flow sheet in actual applications of screen back light source of the present invention;
Fig. 3 is the structural representation of the control device of screen back light source of the present invention.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
For existing issue, embodiments of the invention provide a kind of control method of screen back light source, can carry out the output power consumption of each viewing area in Dynamic controlling screen based on brightness, back facet current and gray scale voltage three dimensions.
As shown in Figure 1, the control method that the present invention is directed to the arbitrary viewing area of described screen comprises:
Step 11, determine that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Here need to be described, the brightness of pixel is determined by back facet current and gray scale voltage.A pixel is under a certain brightness, if back facet current is determined, then gray scale voltage also can be determined.
Step 12, using each pixel in described viewing area for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
A back facet current value can only be exported owing to driving the backlight of a viewing area, although each pixel is meeting under respective predetermined luminance, there is various configuration data, but only have when the back facet current value of these pixels is identical, could as a successful allocation plan, this step is exactly screen the configuration data of each pixel.
Step 13, calculates the output power consumption of described viewing area for each candidate's allocation plan;
Wherein, a candidate scheme includes all configuration datas of viewing area under back facet current value is identical.This step specifically calculates all pixels when applying corresponding configuration data, the output power consumption of viewing area.
Step 14, will export the minimum candidate's allocation plan of power consumption as described viewing area at the allocation plan that described frame to be shown is final.
The embodiment of this control method is to meet premised on brightness, first determine all back facet currents that can export of the backlight of viewing area, for each back facet current that can export, in conjunction with the gray scale voltage that each pixel is corresponding, determine the true power consumption of viewing area, thus be accurately allocation plan that viewing area provides the power consumption of minimum.
Further, in described frame to be shown, the control method of the present embodiment just can according to the configuration data of each pixel in described viewing area corresponding to described final allocation plan, the corresponding each pixel driven in described viewing area.
Wherein, viewing area exports power consumption and specifically comprises: backlight power consumption and logical drive power consumption,
In above-mentioned steps 13, calculating viewing area comprises for the output power consumption of arbitrary candidate's allocation plan:
Step 131, according to the back facet current in candidate's allocation plan that described display area is corresponding, calculates the backlight power consumption of described viewing area;
Wherein, the backlight power consumption P of described viewing area
light=I
2* R
light/ η
light;
In the computing formula of above-mentioned backlight power consumption, I is the back facet current of described viewing area, R
lightfor the lamp bar resistance of viewing area, η
lightfor the lamp bar work efficiency of viewing area.
Step 132, according to the gray scale voltage of each pixel in candidate's allocation plan that described display area is corresponding, calculates the logical drive power consumption of described viewing area;
Wherein, the logical drive power consumption P of described viewing area
logic=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
d-IC (n)+ P
lossi/ η
power;
In the computing formula of above-mentioned logical drive power consumption, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-IC (1)to P
d-IC (n)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; P
lossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
Step 133, is added the backlight power consumption of candidate's allocation plan corresponding for described display area with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
Below the control method of the present embodiment is described in detail.
Suppose that each pixel of viewing area is designated as a brightness of image of changing to be shown: [Lum (1), Lum (2) ... Lum (n)], wherein lum represents brightness, and n represents that this region backlight respective pixel number is n.
Determine the candidate's allocation plan in viewing area afterwards, comprising:
The set of the configuration data reached under predetermined luminance is needed to be designated as respectively respectively the pixel of the n in described viewing area: Panel1 [(I1, V1), (I2, V2) ... (Ia, Va)], Panel2 [(I1, V1), (I2, V2) ... (Ib, Vb)], Paneln [(I1, V1), (I2, V2) ... (Ix, Vx)]; Wherein, Panel1-Paneln represents n pixel in described viewing area respectively; A, b, x represent that a pixel can meet the group number of the configuration data of predetermined luminance;
In the set of the configuration data under n pixel needs to reach predetermined luminance respectively, determine the back facet current I1 ＇ that simultaneously can meet this n pixel, I2 ＇ ... Im ＇; M represents the back facet current group number that simultaneously can meet this n pixel;
Be I1 ＇, I2 ＇ for back facet current respectively by n pixel ... the set of the configuration data of Im ＇ is defined as candidate's allocation plan.
After determining each candidate scheme, start to calculate the output power consumption of viewing area for each candidate scheme:
According to backlight power consumption computing formula mentioned above, can calculate when described viewing area back facet current is I1 ＇, backlight power consumption value is P1 '
light.
Afterwards the gray scale voltage value of the pixel of the n in described display area when back facet current is I1 ＇ is designated as [V1 ＇ (1), V1 ＇ (2) ... V1 ＇ (n)], and according to [V1 ＇ (1), V1 ＇ (2) ... V1 ＇ (n)] calculate the power consumption of driving circuit for each pixel of described viewing area, be designated as [P1 '
d-IC (1), P1 '
d-IC (2)..., P1 '
d-IC (n)].
The total output power consumption P1 ' calculated when described viewing area when back facet current is I1 ＇ is P1 ' afterwards
light+ P1 '
d-IC (1)+ P1 '
d-IC (2)+ ... + P1 '
d-IC (n).
In like manner, viewing area is calculated successively for I2 ＇ ... total output power consumption of Im ＇ be P2 ' to Pm ', and at P1 ' in Pm ', choose candidate's allocation plan corresponding to a minimum value as the final allocation plan of described viewing area at frame to be shown.
Below in conjunction with a practical application, control method of the present invention is described in detail.
In this practical application, the three-dimensional mathematical model by back facet current, gray scale voltage and brightness calculates all candidate's allocation plans in viewing area automatically, with viewing area for output power consumption corresponding to each candidate's allocation plan.
When carrying out Dynamic controlling to screen back light source, comprise step as shown in Figure 2:
Step 21, determines the picture of screen at frame to be shown.
Step 22, according to the picture of frame to be shown, determines the viewing area that each backlight is responsible for.
Step 23, adds up the brightness of all pixels in each viewing area, and all configuration datas that all pixels meet under respective brightness.
Step 24, based on the three-dimensional mathematical model of the back facet current of viewing area, gray scale voltage and brightness, calculate candidate's allocation plan of each viewing area, and each viewing area is for the output power consumption corresponding to respective candidate's allocation plan.
Step 25, exports the minimum candidate's allocation plan of power consumption as each viewing area at the final argument of frame work to be shown using each viewing area.
Step 26, in frame to be shown, drives according to the running parameter of each viewing area determined.This running parameter comprises: the back facet current of the unified value of each pixel one in viewing area, and the different gray scale voltages that each pixel is corresponding.
In sum, the solution of the present invention determines the real minimum output power in one, each viewing area with brightness, back facet current, gray scale voltage three dimensions, and compared to prior art, power savings is more obvious, has very high practical value.
In addition, the present invention also provides a kind for the treatment of apparatus of screen back light source, is applied to one of them viewing area of described screen, as shown in Figure 3, comprises:
First processing module, for determining that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Second processing module, for using each pixel for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
3rd processing module, for calculating the output power consumption of described viewing area for each candidate's allocation plan;
4th processing module, will export the minimum candidate's allocation plan of power consumption as described viewing area at the allocation plan that described frame to be shown is final.
The embodiment of this device is to meet premised on brightness, first determine all back facet currents that can export of the backlight of viewing area, for each back facet current that can export, in conjunction with the gray scale voltage that each pixel is corresponding, determine the true power consumption of viewing area, thus be accurately allocation plan that viewing area provides the power consumption of minimum.
Wherein, described treating apparatus, also comprises:
Driver module, in described frame to be shown, according to the configuration data of each pixel in the described viewing area that described final allocation plan is corresponding, the corresponding each pixel driven in described viewing area.
Wherein, described second processing module comprises:
Described 3rd processing module comprises:
First computing unit, for according to the back facet current in candidate's allocation plan corresponding to described display area, calculates the backlight power consumption of described viewing area;
Second computing unit, for the gray scale voltage according to each pixel in candidate's allocation plan corresponding to described display area, calculates the logical drive power consumption of described viewing area;
3rd computing unit, for the backlight power consumption of candidate's allocation plan corresponding for described display area being added with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
Wherein, the backlight power consumption P of described viewing area
light=I*V
light/ η
light;
In the computing formula of above-mentioned backlight power consumption, I is the back facet current of described viewing area, V
lightfor the lamp bar voltage of viewing area, η
lightfor the lamp bar work efficiency of viewing area;
Wherein, the logical drive power consumption P of viewing area described in the logical drive power consumption of described viewing area
light=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
d-IC (n)+ P
loss]/η
power;
In the computing formula of above-mentioned logical drive power consumption, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-IC (1)to P
d-IC (n)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; P
lossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
Obviously, the subject of implementation of the control method of above-mentioned screen back light source applied by the control device of the present embodiment, and therefore, the technique effect achieved by this control method and embodiment are all applicable to the control device of embodiment.In addition, what also need to be described is in the present embodiment, and module can use software simulating, to be performed by the driving chip of display device or driving circuit.
In addition, another embodiment of the present invention also provides a kind of display device comprising above-mentioned control device, when described display device display frame, can, under a guarantee pixel reaches the prerequisite of brightness requirement, select the minimum configuration parameter of power consumption to carry out work.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a control method for screen back light source, described screen includes multiple viewing area, it is characterized in that, the control method for the arbitrary viewing area of described screen comprises:
Determine that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Using each pixel in described viewing area for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
Calculate the output power consumption of described viewing area for each candidate's allocation plan;
To the minimum candidate's allocation plan of power consumption be exported as described viewing area at the allocation plan that described frame to be shown is final.
2. control method according to claim 1, is characterized in that, also comprises:
In described frame to be shown, according to the configuration data of each pixel in the described viewing area that described final allocation plan is corresponding, the corresponding each pixel driven in described viewing area.
3. control method according to claim 1, is characterized in that,
Calculate the output power consumption of described viewing area for each candidate's allocation plan, comprising:
According to the back facet current in candidate's allocation plan that described display area is corresponding, calculate the backlight power consumption of described viewing area;
According to the gray scale voltage of each pixel in candidate's allocation plan that described display area is corresponding, calculate the logical drive power consumption of described viewing area;
The backlight power consumption of candidate's allocation plan corresponding for described display area is added with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
4. control method according to claim 3, is characterized in that,
The backlight power consumption P of described viewing area
light=I
2* R
light/ η
light; Wherein, I is the back facet current of described viewing area, R
lightfor the lamp bar resistance of viewing area, η
lightfor the lamp bar work efficiency of viewing area;
The logical drive power consumption P of described viewing area
logic=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
d-IC (n)+ P
loss]/η
power; Wherein, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-IC (1)to P
d-IC (n)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; P
lossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
5. a control device for screen back light source, is applied to one of them viewing area of described screen, it is characterized in that, comprising:
First processing module, for determining that each pixel in viewing area is reaching under the predetermined luminance required by frame to be shown, all possible configuration data, described configuration data includes back facet current and gray scale voltage;
Second processing module, for using each pixel for the configuration data of the back facet current of identical value as candidate's allocation plan of a described viewing area;
3rd processing module, for calculating the output power consumption of described viewing area for each candidate's allocation plan;
4th processing module, will export the minimum candidate's allocation plan of power consumption as described viewing area at the allocation plan that described frame to be shown is final.
6. control device according to claim 5, is characterized in that, also comprises:
Driver module, in described frame to be shown, according to the configuration data of each pixel in the described viewing area that described final allocation plan is corresponding, the corresponding each pixel driven in described viewing area.
7. control device according to claim 5, is characterized in that,
Described 3rd processing module comprises:
First computing unit, for according to the back facet current in candidate's allocation plan corresponding to described display area, calculates the backlight power consumption of described viewing area;
Second computing unit, for the gray scale voltage according to each pixel in candidate's allocation plan corresponding to described display area, calculates the logical drive power consumption of described viewing area;
3rd computing unit, for the backlight power consumption of candidate's allocation plan corresponding for described display area being added with logical drive power consumption, obtains the output power consumption of described viewing area for this candidate's allocation plan.
8. control device according to claim 5, is characterized in that,
The backlight power consumption P of described viewing area
light=I*V
light/ η
light; Wherein, I is the back facet current of described viewing area; V
lightfor the lamp bar voltage of viewing area; η
lightfor the lamp bar work efficiency of viewing area;
The logical drive power consumption P of described viewing area
logic=[P
tcon+ P
d-IC (1)+ P
d-IC (2)+ ... P
c-IC (n)+ P
loss]/η
power; Wherein, P
tconfor control register is for the power consumption of described viewing area, determined by the output mode of control register; P
d-IC (1)to P
d-IC (n)for the driving circuit of described viewing area is respectively for the power consumption of n pixel of described viewing area,
u
nfor the gray scale voltage of pixel n, R
d-ICfor the resistance of driving circuit; P
lossfor the loss on the transmission line of control register and driving circuit; η
powerfor the power supplying efficiency of control register and driving circuit.
9. a display device, is characterized in that, comprises the control device as described in any one of claim 5-8.
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| CN105185322B (en) | 2018-02-23 |
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