CN107424572A - A kind of display drive method, device and display - Google Patents
A kind of display drive method, device and display Download PDFInfo
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- CN107424572A CN107424572A CN201710440186.6A CN201710440186A CN107424572A CN 107424572 A CN107424572 A CN 107424572A CN 201710440186 A CN201710440186 A CN 201710440186A CN 107424572 A CN107424572 A CN 107424572A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Embodiments of the invention provide a kind of display drive method, device and display, are related to display technology field, for improving the display effect of display device.This method includes：Obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea；The luminosity of each backlight subarea is obtained according to the average gray-scale value of the pixel in each backlight subarea；Judge whether the luminosity of each backlight subarea is less than first threshold；If the luminosity of any backlight subarea is less than first threshold, when then showing that signal is shown to the frame, it is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea, and the peak value of the corresponding backlight drive electric current in the backlight subarea is adjusted with the ratio of first threshold according to the luminosity of the backlight subarea.Embodiments of the invention are used for the driving of display device.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of display drive method, device and display.
Background technology
Contrast is one of parameter for evaluating display performance, and contrast is higher, and the picture level of display device reduction is sympathetic
Better, the sharp keen degree of image is higher, and image is also more clear.
Tradition improves display panel and improves the contrast of display panel by improving the maximum brightness of display panel, although
By improving the maximum brightness of display panel, the contrast of display panel is relatively easy easy improving, but the brightness of back light
Higher, the life-span of back light is shorter, is influenceed by the life-span of back light, and the luminosity of back light can not be carried infinitely
It is high.In the prior art in order to further improve the contrast of display device, it is proposed that a kind of with dynamic backlight adjustment function
Liquid crystal display device, there is the liquid crystal display device of dynamic backlight adjustment function when showing gray scale image, by LCD
The backlight module of plate is divided into multiple backlight subareas, according to the monochrome information dynamic included in display signal when carrying out image display
The luminance of each backlight subarea is adjusted, when luminosity corresponding to a certain backlight subarea is larger, makes the driving backlight subarea
Luminous pulse width modulation (English name：Pulse Width Modulation, referred to as：PWM) duty of signal is bigger,
And then make the luminosity of the backlight subarea larger, when luminosity corresponding to a certain backlight subarea is smaller, make this point of driving
The duty of the luminous pwm signal in area is smaller, and then makes the luminosity of the subregion smaller, passes through backlight module luminosity
The contrast of low GTG and high gray in difference increase display image, improve the display effect of display device.Due to display device
In mos field effect transistor (English name：Metal Oxide Semiconductor Field
Effect Transistor, referred to as：MOSFET the limitation of on state characteristic), can exist when the dutycycle of pwm signal is smaller and adjust
The problem of light precision and stability difference, show as backlight flicker.Current way is to limit the minimum duty of a pwm signal
Than, when luminosity corresponding to backlight subarea is less than threshold value, all lighted with this minimum duty cycle driving backlight subarea, but this
Shi Wufa increases the contrast of low GTG and high gray in display image by adjusting backlight luminance, therefore can influence display dress
The display effect put.
The content of the invention
Embodiments of the invention provide a kind of display drive method, device and display, for improving the aobvious of display device
Show effect.
To reach above-mentioned purpose, embodiments of the invention adopt the following technical scheme that：
First aspect, there is provided a kind of display drive method, for driving display to be shown；The backlight of the display
Module includes at least one backlight subarea, and each backlight subarea passes through corresponding backlight drive galvanoluminescence respectively；Methods described bag
Include：
Obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea；
The luminosity of each backlight subarea is obtained according to the average gray-scale value of the pixel in each backlight subarea；
Judge whether the luminosity of each backlight subarea is less than first threshold；
If the luminosity of any backlight subarea is less than first threshold, when showing that signal is shown to the frame, by this
The duty cycle adjustment of backlight drive electric current corresponding to backlight subarea is default dutycycle, and according to the luminosity of the backlight subarea
The peak value of the corresponding backlight drive electric current in the backlight subarea is adjusted with the ratio of the first threshold.
Second aspect, there is provided a kind of display drive apparatus, for driving display to be shown；The backlight of the display
Module includes at least one backlight subarea, and each backlight subarea passes through corresponding backlight drive galvanoluminescence respectively；Described device bag
Include：Acquiring unit, processing unit and adjustment unit；
The acquiring unit is used to obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea, and
The luminosity of each backlight subarea is obtained according to the average gray-scale value of the pixel in each backlight subarea；
The processing unit is used to judge whether the luminosity of each backlight subarea is less than first threshold；
The luminosity that the adjustment unit is used in any backlight subarea is less than first threshold and shows signal to the frame
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea when being shown, and according to the back of the body
The luminosity of light subregion is carried out with the ratio of the first threshold to the peak value of the corresponding backlight drive electric current in the backlight subarea
Regulation.
The third aspect, there is provided a kind of display, including：Above-mentioned display drive apparatus.
The display drive method that embodiments of the invention provide, a frame is obtained first and is shown in signal in each backlight subarea
The average gray-scale value of pixel, the luminance of each backlight subarea is then obtained according to the average gray-scale value of the pixel in each backlight subarea
Degree；When showing that signal is shown to the frame if the luminosity of any backlight subarea is less than first threshold, by the backlight point
The duty cycle adjustment of backlight drive electric current corresponding to area is default dutycycle, and according to the luminosity of the backlight subarea and first
The peak value of backlight drive electric current corresponding to the backlight subarea is adjusted the ratio of threshold value, due to the luminance in backlight subarea
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to backlight subarea, so can when degree is less than first threshold
With the backlight flicker for avoiding backlight subarea from sending, and because when the luminosity of backlight subarea is less than first threshold, according to this
The luminosity of backlight subarea is adjusted with the ratio of first threshold to the peak value of the corresponding backlight drive electric current in the backlight subarea
Section, it is possible to the luminosity of backlight subarea is adjusted by the peak value of backlight drive electric current, so as to increase in display image
The contrast of low GTG and high gray, therefore embodiments of the invention can improve the display effect of display device.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is one of step flow chart of display drive method provided in an embodiment of the present invention；
Fig. 2 is the comparison of wave shape figure of backlight drive electric current after regulation provided in an embodiment of the present invention；
Fig. 3 is the two of the step flow chart of display drive method provided in an embodiment of the present invention；
Fig. 4 is the three of the step flow chart of display drive method provided in an embodiment of the present invention；
Fig. 5 is the four of the step flow chart of display drive method provided in an embodiment of the present invention；
Fig. 6 is the schematic diagram of first, second linear relationship provided in an embodiment of the present invention；
Fig. 7 is display drive method application hardware schematic diagram provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of pwm driver provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of backlight subarea provided in an embodiment of the present invention；
Figure 10 is the schematic diagram of display drive apparatus provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It should be noted that in the embodiment of the present invention, " exemplary " or " such as " etc. word make example, example for expression
Card or explanation.Be described as in the embodiment of the present invention " exemplary " or " such as " any embodiment or design should
It is interpreted than other embodiments or design more preferably or more advantage.Specifically, " exemplary " or " example are used
Such as " word is intended to that related notion is presented in a concrete fashion.
It should also be noted that, for the ease of clearly describing the technical scheme of the embodiment of the present invention, in the implementation of the present invention
In example, employ the printed words such as " first ", " second " and function and the essentially identical identical entry of effect or similar item are made a distinction, this
Art personnel are appreciated that the printed words such as " first ", " second " are not to be defined to quantity and execution order.
The total design concept of the present invention is：For when the luminosity of backlight subarea is relatively low, if making pwm signal dutycycle
Backlight flicker can be made by reducing with the luminosity of backlight subarea, and make pwm signal dutycycle for fixed minimum duty cycle then without
The problem of luminosity of backlight module is adjusted method, luminosity of the embodiment of the present invention in backlight subarea are less than certain
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to backlight subarea during threshold value, so as to avoid backlight flicker,
And the peak value of the corresponding backlight drive electric current in backlight subarea is adjusted with the ratio of threshold value by the luminosity of backlight subarea
Section, so as to adjust the luminosity of backlight subarea.
Based on the above, embodiments of the invention provide a kind of display drive method, and the display drive method is used to drive
Dynamic display is shown that the backlight module of display includes at least one backlight subarea, and each backlight subarea passes through correspondingly respectively
Backlight drive galvanoluminescence.
That is, the backlight module of display provided in an embodiment of the present invention can only include a backlight subarea, can also wrap
Two or more backlight subareas are included, each backlight subarea drives luminous by independent backlight drive electric current respectively.
Shown in reference picture 1, display drive method provided in an embodiment of the present invention comprises the following steps：
S11, obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea.
Specifically, each backlight subarea corresponds with the viewing area on display panel respectively, carried out to display signal
During display, if any pixel is located at corresponding to any backlight subarea in viewing area, the pixel is the picture in the backlight subarea
Element.
S12, the luminosity according to each backlight subarea of the average gray-scale value of the pixel in each backlight subarea acquisition.
Specifically, it can be obtained according to the corresponding relation of the average gray-scale value of pixel and the luminosity of backlight subarea each
The luminosity of backlight subarea.Wherein, the corresponding relation of the luminosity of the average gray-scale value of pixel and backlight subarea can be with
The modes such as mapping table, functional relation store in the display, so as to the average ash according to the pixel in each backlight subarea
Rank value is called when obtaining the luminosity of each backlight subarea.
S13, judge whether the luminosity of each backlight subarea is less than first threshold.
It should be noted that first threshold could be arranged to empirical value, it can also be tested and obtained according to specific backlight module
Take.Specifically, test process can be：The dutycycle of backlight drive electric current is sequentially reduced, acquisition can send backlight subarea
The threshold value dutycycle that does not flash of backlight, by hair of the backlight subarea when the dutycycle of backlight drive electric current is threshold value dutycycle
Brightness is arranged to first threshold.
In above-mentioned steps S13, if the luminosity of any backlight subarea is less than first threshold, step S14 is performed.
S14, when showing that signal is shown to the frame, the dutycycle of backlight drive electric current corresponding to the backlight subarea is adjusted
Save to preset dutycycle, and according to the luminosity of the backlight subarea back of the body corresponding to the backlight subarea with the ratio of first threshold
The peak value of CD-ROM drive streaming current is adjusted.
Default dutycycle in the embodiment of the present invention is it can also be provided that empirical value, or is surveyed according to specific backlight module
Examination obtains the threshold value dutycycle that the backlight that can send backlight subarea does not flash and is used as default dutycycle.Exemplary, preset
Dutycycle can be 5%.
According to the luminosity of the backlight subarea back of the body corresponding to backlight subarea with the ratio of first threshold in above-described embodiment
The peak value of CD-ROM drive streaming current is adjusted, and is specifically as follows：The peak value of backlight drive electric current corresponding to backlight subarea is adjusted to
The luminosity of backlight subarea and the ratio of first threshold and before not adjusting the peak value of backlight drive electric current product.
It is exemplary, shown in reference picture 2, the luminosity in Fig. 2 using first threshold as 5IRE, backlight subarea is 3IRE,
When default dutycycle is 5%, according to prior art and display drive method provided in an embodiment of the present invention to backlight drive electricity
The waveform state diagram of backlight drive electric current after stream regulation.As shown in the waveform a in Fig. 2, a kind of scheme of the prior art is will
The duty-cycle limit of backlight drive electric current so can be such that backlight illumination does not adjust, influence display effect 5%；Such as Fig. 2 medium waves
Shown in shape b, it by the duty cycle adjustment of backlight drive electric current is 3% that another scheme of the prior art, which is, can so make backlight
In the presence of flicker, display effect is equally influenceed；Waveform c is the regulation scheme of the embodiment of the present invention in Fig. 2, and the backlight subarea is corresponding
The duty cycle adjustment of backlight drive electric current be 5%, and before the peak value of backlight drive electric current is adjusted not carry out peak value regulation
Backlight drive electric current peak value 60%, so will not both cause backlight flicker, again can be to the luminosity of backlight subarea
It is adjusted, therefore display effect can be improved.
The display drive method that embodiments of the invention provide, a frame is obtained first and is shown in signal in each backlight subarea
The average gray-scale value of pixel, the luminance of each backlight subarea is then obtained according to the average gray-scale value of the pixel in each backlight subarea
Degree；When showing that signal is shown to the frame if the luminosity of any backlight subarea is less than first threshold, by the backlight point
The duty cycle adjustment of backlight drive electric current corresponding to area is default dutycycle, and according to the luminosity of the backlight subarea and first
The peak value of backlight drive electric current corresponding to the backlight subarea is adjusted the ratio of threshold value, due to the luminance in backlight subarea
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to backlight subarea, so can when degree is less than first threshold
With the backlight flicker for avoiding backlight subarea from sending, and because when the luminosity of backlight subarea is less than first threshold, according to this
The luminosity of backlight subarea is adjusted with the ratio of first threshold to the peak value of the corresponding backlight drive electric current in the backlight subarea
Section, it is possible to the luminosity of backlight subarea is adjusted by the peak value of backlight drive electric current, so as to increase in display image
The contrast of low GTG and high gray, therefore embodiments of the invention can improve the display effect of display device.
Optionally, shown in reference picture 3, the above method also includes：
If the luminosity of any backlight subarea is more than first threshold in above-mentioned steps S13, step S15 is performed.
S15, to the frame show signal show when, according to the luminosity of the backlight subarea and the ratio of first threshold
The dutycycle of backlight drive electric current corresponding to the backlight subarea is adjusted.
When the luminosity of backlight subarea is more than first threshold, the dutycycle of backlight drive electric current corresponding to backlight subarea
It is larger, the flicker of backlight will not be caused, therefore when the luminosity of backlight subarea is more than first threshold, can be by backlight
The dutycycle of driving current is adjusted, so as to adjust the luminosity of backlight subarea.
Further alternative, shown in reference picture 4, the above method also includes：
If the luminosity of any backlight subarea is equal to first threshold in above-mentioned steps S13, step S16 is performed.
S16, when showing that signal is shown to the frame, the dutycycle of backlight drive electric current corresponding to the backlight subarea is adjusted
Save to preset dutycycle.
Further, when the grey decision-making of pixel is smaller, its corresponding data voltage is smaller, and the film in display is brilliant
Body pipe (English name：Thin Film Transistor, referred to as：TFT low-voltage response) is generally undesirable, it is thus possible to meeting
Make display effect of the pixel when showing the image of low grey decision-making poor.Based on upper technical problem, provided in above-described embodiment
On the basis of display drive method, the embodiment of the present invention further provides a kind of display characteristic when improving the low grey decision-making of pixel
Method.Specifically, shown in reference picture 5, this method includes：
Whether S51, the grey decision-making for judging to show any pixel in signal are more than Second Threshold.
In above-mentioned steps S51, if the grey decision-making of pixel is more than Second Threshold, step S52 is performed, if the GTG of pixel
Value is less than or equal to Second Threshold, then performs step S53.
S52, according to the first linear relationship the grey decision-making of the pixel is adjusted.
S53, according to the second linear relationship the grey decision-making of the pixel is adjusted.
Wherein, as shown in fig. 6, Second Threshold a is more than the minimum gray value b of pixel and less than the maximum gray value c of pixel；
It is linear according to first when the grey decision-making (input grey decision-making) of any pixel is the maximum gray value c or minimum gray value b of pixel
Relation L1 or the second linear relationship L2 the grey decision-making of the pixel is adjusted the grey decision-making of rear (output grey decision-making) pixel not
Become；When the grey decision-making of any pixel is Second Threshold a, the grey decision-making of the pixel is adjusted according to the first linear relationship L1
The grey decision-making d of the pixel is more than Second Threshold a and with the grey decision-making of the pixel is adjusted according to the second linear relationship L2 afterwards
The grey decision-making of the pixel is equal afterwards.
Above-mentioned steps S51-S53 can specifically be realized by the graphics processing unit in display, exemplary, display
The graphics processing unit of device can be logic card (English name：Timer Control Register, referred to as：TCON).
Optionally, the backlight drive electric current in above-described embodiment is pulse width modulation (English name：Pulse Width
Modulation, referred to as：PWM) signal；
The peak value of backlight drive electric current is adjusted, including：By the reference electricity for adjusting pulse width modulation drivers
The peak value of pressure regulation pulse width modulating signal.
Exemplary, as shown in fig. 7, the hardware configuration of the executive agent of display drive method provided in an embodiment of the present invention
Including：DC/DC converters 71, backlight processing unit 72, pwm driver 73, back light 74 (being usually light emitting diode).Its
In, DC/DC converters 71 connect electric network source, for the operating voltage by the voltage conversion of electric network source for back light 74；
Backlight processing unit 72 connects pwm driver 73, for handling the monochrome information of each backlight subarea, according to each backlight subarea
Monochrome information obtain the dutycycle and peak value of driving current corresponding to each backlight subarea, it is and each backlight subarea is corresponding
Driving current dutycycle and peak value send to pwm driver 73；PMW drivers 73 drive according to corresponding to each backlight subarea
The dutycycle and peak value of streaming current produce pulse width modulating signal and drive the back light 74 of each backlight subarea luminous.Enter one
Step, the operation principle of above-mentioned PMW drivers 73 is：By controlling the dutycycle of PMW drivers 73 come controlling transistor 732
ON/OFF frequency, and then the dutycycle for the electric current for flowing through back light 74 is controlled, by the reference for controlling PMW drivers 73
The magnitude of voltage of voltage carrys out the conducting degree of controlling transistor 732, and then controls the peak value for the electric current for flowing through back light 74, therefore
The peak of pulse width modulating signal can be adjusted in above-described embodiment by adjusting the reference voltage of pulse width modulation drivers
Value, so as to realize the regulation of the peak value to backlight drive electric current.
It should also be noted that, shown in reference picture 8, usual pwm driver 73 is cascaded by multiple PWM driving chips and formed,
Each PWM driving chips can produce multiple pwm signals again, and the peak value of the multi-channel PWM signal of part PWM driving chips passes through
Same reference voltage control, i.e., the peak value of the pwm signal of same PWM driving chips output is identical, different PMW driving cores
Piece can just export the pwm signal of different peak values, therefore include two or more in the backlight module of display display
, it is necessary to distribute PWM during backlight subarea (as shown in figure 9, backlight module 90 includes the backlight subarea 91 of the column matrix of 3 row 4 arrangement)
The connection line of driving chip, avoid same PWM chip while connect the backlight light of two or more backlight subareas
Source, so that the peak brightness of each backlight subarea can be with independent control.
Illustrate the device embodiment corresponding with embodiment of the method presented above provided in an embodiment of the present invention below.
It should be noted that in following apparatus embodiment related content explanation, may be referred to above method embodiment.Equally, should
Display drive apparatus is used to drive display to be shown；The backlight module of display includes at least one backlight subarea, each back of the body
Light subregion passes through corresponding backlight drive galvanoluminescence respectively.
In the case where dividing each functional module using corresponding each function, Figure 10 shows involved in above-described embodiment
And display drive apparatus a kind of possible structural representation.Shown in reference picture 10, the display drive apparatus 100 includes：Obtain
Take unit 101, processing unit 102 and adjustment unit 103.
Acquiring unit 101 is used to obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea, and
The luminosity of each backlight subarea is obtained according to the average gray-scale value of the pixel in each backlight subarea；
Processing unit 102 is used to judge whether the luminosity of each backlight subarea is less than first threshold；
The luminosity that adjustment unit 103 is used in any backlight subarea is less than first threshold and shows that signal enters to the frame
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea during row display, and according to the backlight
The peak value of the corresponding backlight drive electric current in the backlight subarea is adjusted with the ratio of first threshold for the luminosity of subregion.
The display drive apparatus that embodiments of the invention provide, a frame is obtained by acquiring unit first and shown in signal respectively
The average gray-scale value of pixel in backlight subarea, each backlight is then obtained according to the average gray-scale value of the pixel in each backlight subarea
The luminosity of subregion；If the luminosity of any backlight subarea is less than first threshold, signal, which is shown, to be shown to the frame
When, by adjustment unit regulation by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea to preset dutycycle, and
Peak value according to the ratio of the luminosity of the backlight subarea and first threshold to the corresponding backlight drive electric current in the backlight subarea
It is adjusted, due to when the luminosity of backlight subarea is less than first threshold, by backlight drive electric current corresponding to backlight subarea
Duty cycle adjustment be default dutycycle, it is possible to the backlight flicker for avoiding backlight subarea from sending, and because in backlight subarea
Luminosity when being less than first threshold, according to the luminosity of the backlight subarea and the ratio of first threshold to the backlight subarea
The peak value of corresponding backlight drive electric current is adjusted, it is possible to adjusts backlight subarea by the peak value of backlight drive electric current
Luminosity, so as to and increase the contrast of low GTG and high gray in display image, therefore embodiments of the invention can be with
Improve the display effect of display device.
Optionally, the luminosity that adjustment unit 103 is additionally operable in any backlight subarea is more than first threshold and to the frame
It is corresponding to the backlight subarea with the ratio of first threshold according to the luminosity of the backlight subarea when display signal is shown
The dutycycle of backlight drive electric current is adjusted.
Optionally, the luminosity that adjustment unit 103 is additionally operable in any backlight subarea is equal to first threshold and to the frame
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea when display signal is shown.
Optionally, above-mentioned display drive apparatus 100 also includes：Compensating unit；
Whether the grey decision-making that processing unit is additionally operable to judge to show any pixel in signal is more than Second Threshold；
If so, then compensating unit is used to the grey decision-making of the pixel be adjusted according to the first linear relationship；
If it is not, then compensating unit is used to the grey decision-making of the pixel be adjusted according to the second linear relationship；
Wherein, Second Threshold is more than the minimum gray value of pixel and less than the maximum gray value of pixel；When any pixel
When grey decision-making is the maximum gray value or minimum gray value of pixel, according to the first linear relationship or the second linear relationship to the pixel
Grey decision-making be adjusted after the pixel grey decision-making it is constant；When the grey decision-making of any pixel is Second Threshold, according to first
After the grey decision-making of the pixel is adjusted linear relationship the grey decision-making of the pixel be more than Second Threshold and with it is linear according to second
The grey decision-making of the pixel is equal after the grey decision-making of the relation pair pixel is adjusted.
Optionally, backlight drive electric current is pulse width modulating signal；
Adjustment unit the peak value of backlight drive electric current is adjusted including：By adjusting pulse width modulation drivers
Reference voltage adjusts the peak value of pulse width modulating signal.
Yet another embodiment of the invention provides a kind of display, including：The display drive apparatus that any of the above-described embodiment provides.
Specifically, display can be：Electronic Paper, mobile phone, tablet personal computer, television set, computer, notebook computer, number
Any product or part with display function such as code-phase frame, navigator.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of display drive method, it is characterised in that for driving display to be shown；The backlight module of the display
Including at least one backlight subarea, each backlight subarea passes through corresponding backlight drive galvanoluminescence respectively；Methods described includes：
Obtain the average gray-scale value that a frame shows the pixel in signal in each backlight subarea；
The luminosity of each backlight subarea is obtained according to the average gray-scale value of the pixel in each backlight subarea；
Judge whether the luminosity of each backlight subarea is less than first threshold；
If the luminosity of any backlight subarea is less than first threshold, when showing that signal is shown to the frame, by the backlight
The duty cycle adjustment of backlight drive electric current corresponding to subregion is to preset dutycycle, and the luminosity according to the backlight subarea and institute
The peak value of backlight drive electric current corresponding to the backlight subarea is adjusted the ratio for stating first threshold.
2. according to the method for claim 1, it is characterised in that methods described also includes：
If the luminosity of any backlight subarea is more than the first threshold, when showing that signal is shown to the frame, according to
Duty of the ratio of the luminosity of the backlight subarea and the first threshold to the corresponding backlight drive electric current in the backlight subarea
Than being adjusted.
3. according to the method for claim 1, it is characterised in that methods described also includes：
If the luminosity of any backlight subarea is equal to the first threshold, when showing that signal is shown to the frame, by this
The duty cycle adjustment of backlight drive electric current corresponding to backlight subarea is default dutycycle.
4. according to the method for claim 1, it is characterised in that methods described also includes：
Judge whether the grey decision-making of any pixel in the display signal is more than Second Threshold；
If so, then the grey decision-making of the pixel is adjusted according to the first linear relationship；
If it is not, then the grey decision-making of the pixel is adjusted according to the second linear relationship；
Wherein, the Second Threshold is more than the minimum gray value of pixel and less than the maximum gray value of pixel；When any pixel
When grey decision-making is the maximum gray value or minimum gray value of pixel, according to the first linear relationship or the second linear relationship to the pixel
Grey decision-making be adjusted after the pixel grey decision-making it is constant；When the grey decision-making of any pixel is Second Threshold, according to first
After the grey decision-making of the pixel is adjusted linear relationship the grey decision-making of the pixel be more than Second Threshold and with it is linear according to second
The grey decision-making of the pixel is equal after the grey decision-making of the relation pair pixel is adjusted.
5. according to the method described in claim any one of 1-4, it is characterised in that the backlight drive electric current is adjusted for pulse width
Signal processed；
The peak value to backlight drive electric current is adjusted, including：By the reference electricity for adjusting pulse width modulation drivers
The peak value of pressure regulation pulse width modulating signal.
6. a kind of display drive apparatus, it is characterised in that for driving display to be shown；The backlight module of the display
Including at least one backlight subarea, each backlight subarea passes through corresponding backlight drive galvanoluminescence respectively；Described device includes：Obtain
Take unit, processing unit and adjustment unit；
Average gray-scale value of the acquiring unit for obtaining the pixel in frame display signal in each backlight subarea, and according to
The average gray-scale value of pixel in each backlight subarea obtains the luminosity of each backlight subarea；
The processing unit is used to judge whether the luminosity of each backlight subarea is less than first threshold；
The luminosity that the adjustment unit is used in any backlight subarea is less than first threshold and shows that signal is carried out to the frame
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea during display, and according to the backlight point
The peak value of the corresponding backlight drive electric current in the backlight subarea is adjusted with the ratio of the first threshold for the luminosity in area.
7. device according to claim 6, it is characterised in that
The luminosity that the adjustment unit is additionally operable in any backlight subarea is more than first threshold and shows that signal enters to the frame
During row display, the corresponding backlight in the backlight subarea is driven with the ratio of the first threshold according to the luminosity of the backlight subarea
The dutycycle of streaming current is adjusted.
8. device according to claim 6, it is characterised in that
The luminosity that the adjustment unit is additionally operable in any backlight subarea is equal to first threshold and shows that signal enters to the frame
It is default dutycycle by the duty cycle adjustment of backlight drive electric current corresponding to the backlight subarea during row display.
9. device according to claim 6, it is characterised in that described device also includes：Compensating unit；
The processing unit is additionally operable to judge whether the grey decision-making of any pixel in the display signal is more than Second Threshold；
If so, then the compensating unit is used to the grey decision-making of the pixel be adjusted according to the first linear relationship；
If it is not, then the compensating unit is used to the grey decision-making of the pixel be adjusted according to the second linear relationship；
Wherein, the Second Threshold is more than the minimum gray value of pixel and less than the maximum gray value of pixel；When any pixel
When grey decision-making is the maximum gray value or minimum gray value of pixel, according to the first linear relationship or the second linear relationship to the pixel
Grey decision-making be adjusted after the pixel grey decision-making it is constant；When the grey decision-making of any pixel is Second Threshold, according to first
After the grey decision-making of the pixel is adjusted linear relationship the grey decision-making of the pixel be more than Second Threshold and with it is linear according to second
The grey decision-making of the pixel is equal after the grey decision-making of the relation pair pixel is adjusted.
A kind of 10. display, it is characterised in that including：Display drive apparatus described in claim any one of 6-9.
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