CN105390096A - Method and device for over-driving control of regional dimming - Google Patents
Method and device for over-driving control of regional dimming Download PDFInfo
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- CN105390096A CN105390096A CN201510823877.5A CN201510823877A CN105390096A CN 105390096 A CN105390096 A CN 105390096A CN 201510823877 A CN201510823877 A CN 201510823877A CN 105390096 A CN105390096 A CN 105390096A
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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
- G09G3/36—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 using liquid crystals
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
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Abstract
The invention discloses a method and device for over-driving control of regional dimming. The method for over-driving control of regional dimming includes the steps of: performing initialization during electrification, and collecting an image brightness signal of each subarea of an image; calculating a pre-driving current value and pre-output total power consumption according to the image brightness signal, and comparing the pre-output total power consumption with target power consumption; when the pre-output total power consumption is smaller than the target power consumption, lighting up a target area with pre-driving current; and when the pre-output total power consumption is larger than the target power consumption, lighting up the target area after reducing the pre-driving current. Driving current of different magnitude is selected according to different situations, the overall brightness can be guaranteed, particularly contribution to the brightness of a bright scene of a small area is prominent, and the overall power consumption can also be controlled, thereby solving the problem that in existing backlight drive, when a small-area bright field is adopted, the brightness is not enough, or when a large-area bright field is adopted, power consumption is too high, and further improving the contrast ratio of display of a liquid crystal display panel.
Description
Technical field
The present invention relates to backlight control techniques field, the mistake particularly relating to a kind of local dimming drives control method and device thereof.
Background technology
LocalDimming technology and territory regulation technology, can according to the different brightness of picture zones of different, and go the backlight control changing corresponding region, the region that picture is brighter, corresponding backlight just lightens, the region that picture is darker, and corresponding backlight just dims.The change of this backlight is that every frame picture goes adjustment immediately, and can strengthen picture contrast, at darker picture, corresponding backlight can be dimmed, and such picture will become darker, thus strengthens picture contrast.
Liquid crystal display panel can be divided into several regions by local dimming technology (i.e. territory regulation technology), and there is corresponding LED backlight in each region, and the brightness in each region removes drived control separately.Control end can gather the brightness of image of the picture in region corresponding to every LED lamp, and this brightness of image exports corresponding brightness control signal and goes to drive corresponding region.For tradition back of the body mode, local dimming is saved while power consumption can the contrast of effective improving picture, and black picture can be deeper, and bright picture can be more penetrating.But because current subregion is more and more thinner, the lamp grain of backlight area gets more and more, and to this, reach a higher brightness, the drive current of required each subregion is just less, cause the bright spot of the black middle part zonule of large area will brightly not get up or brightness not obvious.The highlight effect of every lamp can not have been given play to.And if transitional region around or dark scene can not form stronger contrast, but the predrive electric current of Integral lifting backlight drive, not only can sacrifice some contrasts, and overall power can be caused very large.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, a kind of mistake of local dimming is the object of the present invention is to provide to drive control method and device thereof, the problem that during to solve existing backlight drive small area bright field bright not or large regions bright field, power consumption is too high.
In order to achieve the above object, this invention takes following technical scheme:
The mistake of local dimming drives a control method, and it comprises
Initialization when powering on, gathers the image brightness signal of each subregion of image;
Calculate predrive current value and pre-output total power consumption according to described image brightness signal, and compare the size of pre-output total power consumption and target power consumption;
When pre-output total power consumption is less than target power consumption, light target area with predrive electric current; When pre-output total power consumption is greater than target power consumption, after reducing predrive electric current, light target area.
The mistake of described local dimming is driven in control method, and the described step according to described image brightness signal calculating predrive current value and pre-output total power consumption specifically comprises:
The pre-output numerical value estimating to export to drive IC is first calculated according to image brightness signal;
According to the predrive current value of pre-output numerical evaluation corresponding to it;
The pre-output total power consumption of backlight module and circuit board consumption is calculated according to predrive current value.
The mistake of described local dimming is driven in control method, and the step lighting target area after described reduction predrive electric current specifically comprises:
Calculate the first ratio of target power consumption and pre-output total power consumption;
Described predrive electric current is multiplied by the first ratio and obtains output driving current;
Target area is lighted with output driving current.
The mistake of described local dimming is driven in control method, and described circuit board comprises mainboard, power panel, constant current plate.
The mistake of described local dimming is driven in control method, describedly lights target area with predrive electric current, before lighting the step of target area, also comprises after reducing predrive electric current:
Verify the predrive current value of the predrive current value exported or reduction, verification is correctly then lighted target area and enters image brightness signal collection next time, and check errors then asks to resend.
The mistake of local dimming drives a control device, is connected with backlight module, and it comprises image capture module, output control module and backlight drive module;
Described image capture module gathers each sectional image luminance signal and passes to output control module; Output control module calculates predrive current value and pre-output total power consumption according to described image brightness signal, and compares the size of pre-output total power consumption and target power consumption; When pre-output total power consumption is less than target power consumption, output control module controls backlight drive module and lights target area with predrive electric current; When pre-output total power consumption is greater than target power consumption, output control module controls backlight drive module after reducing predrive electric current and lights target area.
The mistake of described local dimming is driven in control device, and described backlight module comprises several lamp districts; Described backlight drive module comprises the drive IC for controlling the light on and off of lamp district, and each drive IC controls to preset Ge Deng district.
The mistake of described local dimming is driven in control device, and described image capture module, output control module are integrated into Soc chip, and the drive IC that the SPI interface of Soc chip is corresponding with lamp district communicates to connect.
Compared to prior art, the mistake of a kind of local dimming provided by the invention drives control method and device thereof, by gathering the image brightness signal of each subregion of image, calculate predrive current value and pre-output total power consumption according to described image brightness signal, and compare the size of pre-output total power consumption and target power consumption; Target area is lighted with predrive electric current when pre-output total power consumption is less than target power consumption; When pre-output total power consumption is greater than target power consumption, after reducing predrive electric current, light target area; The drive current of different size is selected according to different situations, overall brightness can be ensured, Overall Power Consumption can be controlled again, thus the problem that when solving existing backlight drive small area bright field bright not or large regions bright field, power consumption is too high, further improve the contrast of display panels display.
Accompanying drawing explanation
Fig. 1 is the local dimming schematic diagram that the embodiment of the present invention provides;
Fig. 2 is that the mistake of the local dimming that the embodiment of the present invention provides drives control method process flow diagram;
Fig. 3 is the subregion schematic diagram of the local dimming that the embodiment of the present invention provides;
Fig. 4 is the white field window schematic diagram of the Window20% that the embodiment of the present invention provides;
Fig. 5 is the brightness schematic diagram of the white field of the Window20% that the embodiment of the present invention provides;
Fig. 6 is the brightness of the white field window of the Window20% that the embodiment of the present invention provides is the schematic diagram of 800nits;
Fig. 7 is the structured flowchart that mistake that the embodiment of the present invention provides drives control device;
Fig. 8 is the schematic diagram that mistake that the embodiment of the present invention provides drives control device;
Fig. 9 is the subregion schematic diagram in little bright piece of the upper left corner in the local dimming that provides of the embodiment of the present invention.
Embodiment
The mistake that the invention provides a kind of local dimming drives control method and device thereof, is applicable to the backlight control of liquid crystal flat-panel display screen.For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, the backlight of the liquid crystal panel of region light modulation is divided into several districts equably according to linescan method, as 1,2,3,4,5,6 ..., N district.In Fig. 1, V represents row, and H represents first district of last column, and N represents last district.The image change that whether these districts light and brightness value Dou Yugai district is corresponding associates with brightness of image, and along with brightness, the moving direction of image, corresponding district also can change in brightness, and direction also becomes along with image, and namely drive current is in change.Usual at present image is divided into 0 to 255 GTGs by 8 bits of encoded, wherein the corresponding complete black field of 0x00, now brightness is the most black, and namely gray-scale value is 0, and the value in its R, G, B tri-chamber is 0.The corresponding complete white field of 0xFF, now brightness is the brightest, and gray-scale value is 255, and the value in its R, G, B tri-chamber is 255.
In order to reach localdimming effect, the traditionally way of localdimming, when zonule bright field, lamp around zonule can be reduced, or brightness reduces, thus ensure the dark of black scene, like this by causing the brightness of zonule bright field scape on the low side, the brightness requirement of zonule can not be reached.If zonule will obtain larger brightness, need the lamp ring around it to open larger, or the brightness of transitional region strengthens, and can cause so again the brightness lifting of dark scene, picture contrast declines, and picture can feel inclined illiteracy.
This is that the present embodiment is intended to allow details in a play not acted out on stage, but told through dialogues not float, and bright field can give play to highlighted advantage; The brightness of the bright picture in zonule is promoted, simultaneously (as complete white field) limit dissipation power when large area is bright, the contrast of more outstanding picture during local dimming; And the more problem causing overall power excessive in backlight subarea can be solved.Refer to Fig. 2, it is the process flow diagram that the mistake of local dimming of the present invention drives the preferred embodiment of control method.The mistake of described local dimming is driven control method and is comprised the following steps:
S100, initialization when powering on, gather the image brightness signal of each subregion of image;
S200, calculate predrive current value and pre-output total power consumption according to described image brightness signal, and compare the size of pre-output total power consumption and target power consumption;
S300, when pre-output total power consumption is less than target power consumption, light target area with predrive electric current; When pre-output total power consumption is greater than target power consumption, after reducing predrive electric current, light target area.
In the present embodiment, during initialization, continuous current is set to a less drive current to light backlight module.Gather the image brightness signal in each region of image afterwards.As shown in Figure 3, Gong240Ge district, is evenly distributed on the backlight module of screen in concrete backlight subarea.Namely the image brightness signal gathering each region of image is gather the image brightness signal will delivering to the data in each district of screen display.The brightness value of described image brightness signal and corresponding region.In the present embodiment, the region of lighting is needed to be target area.The white field window of the Window20% shown in Fig. 4, represents target area in dotted line frame, and extrabold represents corresponding area code.Brightness effects corresponding to Fig. 4 as shown in Figure 5.As target area corresponds to a full white region, other region correspondences are entirely black regions, the data of the monochrome information that 89th district collect be 0xFF(90 district, 91st district, 92nd district, 109th district, 110th district, 111st district, 112nd district, 129th district, 130th district, 131st district, 132nd district, 149th district, 150th district, 151st district, 152nd district, etc. data equal with 89th district), the data of the monochrome information that other districts (entirely black) collects are 0x00.
In described step S200, first calculating according to image brightness signal (adopts localdimming algorithm to calculate, this is prior art) go out the pre-output numerical value that backlight drive IC is exported in expectation, by the predrive current value of pre-output numerical evaluation corresponding to it, then according to the size of drive current, calculate and add up pre-output total power consumption that backlight module and circuit board (as mainboard, power panel, constant current plate) consume (i.e. pre-output drive Overall Power Consumption).Pre-output total power consumption P1 and target power consumption P2 is compared, both ratio P1/P2 can be obtained.The maximum constant current driving power consumption that described target power consumption and power supply can provide.
In described step S300, when pre-output total power consumption is less than target power consumption, namely pre-output total power consumption is under target power consumption, then directly export driving numerical value corresponding to the predrive electric current that calculates to corresponding constant current drive IC to light target area.When pre-output total power consumption is greater than target power consumption, then reduce predrive electric current, as reduced predrive current value according to the ratio of target power consumption and pre-output total power consumption, be specially: by target power consumption acquisition first ratio compared with pre-output total power consumption, thus by predrive current value (namely overall constant current motivation value) by the first ratio calculated toward calculating drive current, to be multiplied with ratio value the output driving current value obtained by predrive current value.Driving numerical value corresponding for output driving current value is sent to corresponding constant current drive IC to light.
In the specific implementation, in order to driving data is correctly transferred to drive end, also need to carry out verification also feedback result to the predrive electric current exported or transmission data corresponding to output driving current value.If verification is correct, lights target area and the image brightness signal collection entered next time display image signals, if check errors, ask to resend.
The present embodiment is for Fig. 3 to Fig. 6, and the concrete mistake setting forth local dimming drives control method.As shown in Figure 4 and Figure 5, send the white field of Window20% with instrument, for the image bright spot of a zonule, the white portion of the centre shown in Fig. 5 represents has a zonule to need brightness very high in abundant dynamic menu, i.e. target area, it corresponds to each district in Fig. 4 in dotted line frame.The lamp lighted due to needs is less, then the pre-output total power consumption calculated is less than target power consumption.Now the direct constant current drive IC that sent to by driving numerical value corresponding for the predrive electric current calculated is to light 16 districts in target area.Now only need light minimum lamp can reach the brightness wanted, and the brightness of transition zone also can be less, ensure that picture transition smooth homogeneous is just passable, whole like this details in a play not acted out on stage, but told through dialogues will be deeper, the bright field of zonule is also more bright obvious and bright picture is more outstanding, and contrast is improved significantly.
And complete white field represents the maximal value of consumed power, if now all drive currents are all used maximum, the power consumption of complete machine so may be caused very high, especially along with subregion gets more and more, when more and more thinner, power consumption can be larger, very high to power requirement, and now merely improving more brightness has not had enough large contribution to image quality raising.
The pre-output total power consumption that during complete white field, the present embodiment calculates is greater than target power consumption, and the ratio P2/P1 of target power consumption and pre-output total power consumption is 60%, exports after output driving current is multiplied by 60% all accordingly again.Like this according to current total power consumption and target power consumption do than after in proportion value lower final drive current further, thus serve Power Limitation effect, the situation that when solving large regions bright field, power consumption is too high.
Based on above-described embodiment, the present invention also provides a kind of mistake to drive control device, and be connected with backlight module, as shown in Figure 7, described mistake is driven control device and comprised; Image capture module 10, output control module 20 and backlight drive module 30.Image capture module 10, according to the partitioning scenario of backlight module, gathers the image brightness signal that each subregion is corresponding respectively, and the image brightness signal collected is passed to output control module 20.Output control module 20 calculates predrive current value according to described image brightness signal, calculates the pre-output total power consumption of backlight module and circuit board consumption according to predrive current value; When pre-output total power consumption is less than target power consumption, output control module 20 controls backlight drive module 30 and lights target area with predrive electric current.When pre-output total power consumption is greater than target power consumption, output control module 20 reduces predrive current value, and control backlight drive module 30 with reduce after predrive electric current light target area.
In the present embodiment, described output control module 20 according to the corresponding relation of the sequence of each subregion of backlight module and each lamp district and backlight drive module 30, serial by predrive electric current or driving data transfer corresponding to the predrive electric current after reducing to backlight drive module 30.Backlight drive module 30 comprises drive IC (i.e. constant current drive IC), and each drive IC controls the light on and off in 16 corresponding Ge Deng districts.Corresponding drive IC is according to the driving numerical value adjustment driver output received, control the size of the electric current exported to reach the value of continuous current or output driving current, light target area with this electric current, thus achieve the luminance dynamic adjustment region backlight according to picture image.
Described backlight module comprises several lamp districts, is 240 Ge Deng districts in the present embodiment.Each drive IC controls to preset Ge Deng district (the present embodiment is 16), and the model of drive IC is different, the lamp district number correspondence change controlled.The Zong Deng district number of the lamp district that the number of drive IC can be controlled by it and backlight module determines.
In the specific implementation, image capture module 10, output control module 20 can be integrated into Soc chip (system level chip), it is communicated by the drive IC of SPI interface with lamp district.As shown in Figure 8, the signal of communication comprises chip selection signal CS, leads from entering signal SDO, leading from going out signal SDI, field sync signal Vsync and enable signal EN.
When chip selection signal CS is low level, data could pass to drive IC from Soc chip effectively.Master goes out from entering signal SDO, and transmission driving data, is outputted to the drive IC in lamp district by Soc chip.Master enters from going out signal SDI, and the feedback data of transmission drive IC, returns to Soc chip by drive IC.Field sync signal Vsync, comprise transmission data between two negative pulses, this signal is produced according to vision signal by Soc chip.Soc chip also needs to drive an enable signal EN to lamp district, enable for drive IC, and only when enable signal EN is high level, so drive IC could start normal work, when needing to close drive IC, is dragged down by enable signal EN.
The various signals that Soc chip exports directly enter next stage, the drive IC in Ji Deng district.Described drive IC has 15, and each can drive 16 districts, and each district is equivalent to a light emitting LED lamp.Wherein the 1st 16 road drived control pin driven connect the negative electrode in the 1 to 16th district respectively, and the 2nd 16 road drived control pin driven connect the negative electrode in the 17 to 32nd district respectively, and by that analogy, the 15th 16 road drived control pin driven connect the negative electrode in the 225 to 240th district respectively; The anode in each district is connected in the output of DC/DC module (power supply).Wherein the anode in the 1 to 16th district links 1DC/DC, the anode in module the 17 to 32 district links 2DC/DC module, by that analogy, the anode in the 225 to 240th district links 15DC/DC module, so constitute the matrix area of 20*12, as shown in Figure 3, it is the 1st district from the upper left corner, and the lower right corner is the 240th district.
Drive IC, by adjustment output duty cycle, namely can tune to the driving current value of needs, also namely achieves the brightness that the corresponding lamp of adjustment is trivial.In the backlight module in 240 Ge Deng districts, correspondence is uniformly distributed 240 LED when being shown as complete white field, namely image is the gray-scale value of 255, if employing traditional approach, this 240 Ge Deng district reaches high-high brightness, and the driving of Soc chip reaches maximum, if predrive electric current is 320mA, overall power is 500W, and brightness is 1600nits.Now the power consumption of complete machine is very high, and when reaching this current value, the IC of constant current plate is also subject to great test simultaneously, and screen backboard and the temperature rise of constant current plate all can be very high.Found by test, the brightness of 1600nits is too bright for LCD TV, sees for a long time and can hurt eyes, also result in the significant wastage of resource.But for the bright field of some zonules in picture, wish that again it can be brighter.
Complete white field state belongs to the situation that pre-output total power consumption is greater than target power consumption, the present embodiment is by the ratio value down transfer drive streaming current of predrive current value according to target power consumption and pre-output total power consumption, Shi Mei road drive current is 220mA, then brightness requirement 1000nits under the state of complete white field, power consumption is now 370W, can not make that plate is overheated and brightness does not hinder eye, make overall performance reach best.
Bright when what meet compared with zonule, as shown in Figure 4.If lamp district corresponding under only lighting Window20% image, only have Window20% to be shown as in image complete white, namely gray-scale value is 255, and other places are entirely black, and gray-scale value is 0, and it belongs to the situation that pre-output total power consumption is less than target power consumption.Predrive current value is 220mA, and brightness is now 550nits, and the bright scene effect playing dynamic menu then zonule under the state that brightness is now 1000nits in complete machine high-high brightness is poor.The brightness suggestion of Window20% can be a desirable selection close to 800nits or higher.If put more lamp (the lamp district within bold box as black in Fig. 6, beyond dotted line frame), now maximum drive current is still 220mA, and the place entirely black at picture will have slight light leak, and picture becomes illiteracy, and the black contrast of stereovision of image is poor.To this, the present embodiment is being no more than the requirement of complete machine maximum power dissipation, under being no more than the prerequisite of constant current plate and backlight module specification, improves the drive current of zonule, lights zonule, can improve the brightness of zonule bright field with the continuous current preset.And Overall Power Consumption controls as within 350W by Power Limitation, and predrive electric current can be 320mA, when Window20% window be entirely in vain time, high-high brightness can to about 800nits.If when now having brighter zonule in picture signal, the brightness of zonule can be allowed more obvious, the stereovision of image is also higher, and picture is more penetrating and gorgeous.
For another example in Fig. 9, there is the region of little two pieces of correspondence sun in the upper left corner, to the region at image being so now a sun, corresponding 22nd district, 23rd district, 42nd district and 43rd district, and other regions high building occlusion area that to be brightness lower.By 22nd district, 23rd district, the drive current in 42nd district and 43rd district is mentioned maximum, and brightness value just can be very high, and high building occlusion area and the sun form striking contrast, and the stereovision of whole picture just improves, and the sun can look can be very penetrating.
In sum, the mistake of a kind of local dimming provided by the present invention drives control method and device thereof, when certain zonule is very bright, judges that pre-output total power consumption is less than target power consumption, then provide relatively large drive current to improve brightness to this region; When there is the bright field of large regions, pre-output total power consumption is greater than target power consumption, by lowering the drive current of backlight area, overall brightness can be ensured, can Overall Power Consumption be controlled again, thus the problem that when solving existing backlight drive small area bright field bright not or large regions bright field, power consumption is too high, further improve the contrast of display panels display, can display deeper black, more obvious is bright.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (8)
1. the mistake of local dimming drives a control method, it is characterized in that, comprises the steps:
Initialization when powering on, gathers the image brightness signal of each subregion of image;
Calculate predrive current value and pre-output total power consumption according to described image brightness signal, and compare the size of pre-output total power consumption and target power consumption;
When pre-output total power consumption is less than target power consumption, light target area with predrive electric current; When pre-output total power consumption is greater than target power consumption, after reducing predrive electric current, light target area.
2. the mistake of local dimming according to claim 1 drives control method, it is characterized in that, the described step according to described image brightness signal calculating predrive current value and pre-output total power consumption specifically comprises:
The pre-output numerical value estimating to export to drive IC is first calculated according to image brightness signal;
According to the predrive current value of pre-output numerical evaluation corresponding to it;
The pre-output total power consumption of backlight module and circuit board consumption is calculated according to predrive current value.
3. the mistake of local dimming according to claim 1 drives control method, it is characterized in that, the step lighting target area after described reduction predrive electric current specifically comprises:
Calculate the first ratio of target power consumption and pre-output total power consumption;
Described predrive electric current is multiplied by the first ratio and obtains output driving current;
Target area is lighted with output driving current.
4. the mistake of local dimming according to claim 2 drives control method, it is characterized in that, described circuit board comprises mainboard, power panel, constant current plate.
5. the mistake of local dimming according to claim 1 drives control method, it is characterized in that, describedly lights target area with predrive electric current, before lighting the step of target area, also comprises after reducing predrive electric current:
Verify the predrive current value of the predrive current value exported or reduction, verification is correctly then lighted target area and enters image brightness signal collection next time, and check errors then asks to resend.
6. the mistake of local dimming drives a control device, is connected with backlight module, it is characterized in that, comprises image capture module, output control module and backlight drive module;
Described image capture module gathers each sectional image luminance signal and passes to output control module; Output control module calculates predrive current value and pre-output total power consumption according to described image brightness signal, and compares the size of pre-output total power consumption and target power consumption; When pre-output total power consumption is less than target power consumption, output control module controls backlight drive module and lights target area with predrive electric current; When pre-output total power consumption is greater than target power consumption, output control module controls backlight drive module after reducing predrive electric current and lights target area.
7. the mistake of local dimming according to claim 6 drives control device, it is characterized in that, described backlight module comprises several lamp districts; Described backlight drive module comprises the drive IC for controlling the light on and off of lamp district, and each drive IC controls to preset Ge Deng district.
8. the mistake of local dimming according to claim 7 drives control device, it is characterized in that, described image capture module, output control module are integrated into Soc chip, and the drive IC that the SPI interface of Soc chip is corresponding with lamp district communicates to connect.
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| CN201510823877.5A CN105390096A (en) | 2015-11-24 | 2015-11-24 | Method and device for over-driving control of regional dimming |
| PCT/CN2016/084006 WO2017088420A1 (en) | 2015-11-24 | 2016-05-31 | Over-driving control method for local dimming and apparatus therefor |
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| CN201510823877.5A CN105390096A (en) | 2015-11-24 | 2015-11-24 | Method and device for over-driving control of regional dimming |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105575343A (en) * | 2016-03-25 | 2016-05-11 | 京东方科技集团股份有限公司 | Backlight control method, backlight module group and display apparatus |
| CN106128372A (en) * | 2016-09-14 | 2016-11-16 | 广州创维平面显示科技有限公司 | The control method of a kind of direct-light-type backlight, control system and LCD TV |
| CN106448570A (en) * | 2016-09-14 | 2017-02-22 | 深圳创维－Rgb电子有限公司 | High-power area dimming control method, control device and television |
| WO2017088420A1 (en) * | 2015-11-24 | 2017-06-01 | 深圳创维－Rgb电子有限公司 | Over-driving control method for local dimming and apparatus therefor |
| CN107666576A (en) * | 2016-07-29 | 2018-02-06 | 四川长虹电器股份有限公司 | A kind of method and apparatus of LCD TV backlight control |
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