CN108780627A - A kind of the backlight power control method and liquid crystal display of liquid crystal display - Google Patents
A kind of the backlight power control method and liquid crystal display of liquid crystal display Download PDFInfo
- Publication number
- CN108780627A CN108780627A CN201780013528.4A CN201780013528A CN108780627A CN 108780627 A CN108780627 A CN 108780627A CN 201780013528 A CN201780013528 A CN 201780013528A CN 108780627 A CN108780627 A CN 108780627A
- Authority
- CN
- China
- Prior art keywords
- pulse width
- backlight
- led
- amplitude
- modulating signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A kind of the backlight power control method and liquid crystal display of liquid crystal display.This method includes the LED pulse width modulating signals that LCD obtains LCD；LCD determines that backlight reduces ratio using content-adaptive backlight control (CABC) algorithm；LCD according to backlight reduce ratio adjust LED pulse width modulating signals amplitude or pulse width at least one of；LED backlight light source in LCD sends out backlight according to the LED pulse width modulating signals after adjustment.Due to according to calculated backlight reduce ratio to the width of the LED pulse width modulating signals or amplitude at least one of be adjusted, to achieve the purpose that reduce backlight power consumption under identical display effect.
Description
Technical field
This application involves liquid crystal display technical fields, and in particular to a kind of backlight power control method of liquid crystal display
And liquid crystal display.
Background technology
Liquid crystal display (Liquid Crystal Display, abbreviation LCD) is in the parallel glass substrate of two panels
Liquid crystal layer is placed, thin film transistor (TFT) (Thin Film Transistor, abbreviation TFT), upper substrate glass are set on lower baseplate glass
Colored filter is set on glass, is changed to control the rotation direction of liquid crystal molecule, to reach with voltage by the signal on TFT
Achieve the purpose that show different colours whether controlling each pixel polarised light outgoing.
Since LCD itself can't shine, that is, need that user is allowed to see that the display content on LCD needs at the back side of LCD
Back light is provided, there are two types of the back lights of current common LCD, and one is use cathode fluorescent tube (Cold
Cathode Fluorescent Lamp, abbreviation CCFL) it is used as back light, the advantage of CCFL is that color representation is good, and deficiency exists
It is higher in power consumption；Another kind is to be used as back light using light emitting diode (Light Emitting Diode, abbreviation LED),
The advantage of LED is small, low in energy consumption, therefore uses LED as backlight, can be reached while taking into account frivolous higher bright
Degree, deficiency are mainly color representation ratio CCFL poor.But with the development of LED technology, this gap is reducing, and in view of
Current mobile terminal device is more demanding cruise duration to equipment, therefore most of mobile terminal device is all made of
LED light source.
In addition, for LCD, since the displaying principle of LCD is to be penetrated through change driving voltage to change liquid crystal layer
Rate reaches different grayscale picture elements, i.e., being transformed into adjacent grayscale from a grayscale needs the regular hour, and weighs one
The grayscale conversion time of a LCD is then the conversion time of its most slow rank, and the conversion reaction time of the most slow rank of traditional LC D can be up to
30~40 milliseconds, caused by effect be exactly that the object that quickly moves of display has apparent smear；The most slow rank of quick LCD turns
Can be then reduced to by changing the reaction time by 5~6 milliseconds, then backlight black insertion technology of arranging in pairs or groups will be always on type and show that becoming impulse type shows i.e.
Smear can effectively be reduced.
But since the liquid crystal layer penetrance of quick LCD is lower than traditional LCD, it is necessary to improve the power consumption of back light
The display brightness of traditional LC D can be reached.
Invention content
The embodiment of the present application provides backlight power control method and the liquid crystal display of a kind of liquid crystal display to solve
Quickly the backlight of LCD consumes high problem at present.
The first aspect of the embodiment of the present application provides a kind of backlight power control method of liquid crystal display, in this method,
LCD can obtain the LED pulse width modulating signals of the LCD first, then corresponding to the LED pulse width modulating signals to wait showing
Show that content carries out content-adaptive backlight technology (Content Adaptive Brightness Control, abbreviation CABC) and handles
Obtaining the backlight of the backlight of the content to be displayed reduces ratio, then, reduces ratio according to the backlight and adjusts LED pulse width tune
At least one of the amplitude of signal processed or pulse width so that the pulse of the LED pulse width modulating signals after adjustment is wide
The product of degree and amplitude is the pulse width of LED pulse width modulating signals before adjustment reduces ratio with the backlight of amplitude product
Example；Finally, LED backlight light source can send out backlight according to the LED pulse width modulating signals after adjustment, i.e., according to the LED pulses
The pulse width and amplitude of bandwidth modulation signals shine.
As can be seen that due to just reducing ratio according to calculated backlight before LED pulse width modulating signals are sent out
Width or amplitude to the LED pulse width modulating signals at least one of be adjusted, and backlight proportionally reduces
The reduction that power consumption can then be brought, to realize that LED backlight light source shines according to the LED pulse width modulating signals after the adjustment
Power dissipation ratio LED backlight light source want low according to the luminous power consumption of the LED pulse width modulating signals before adjustment, to reach in phase
The purpose of backlight power consumption is reduced under same display effect.
In some embodiments, the width that ratio adjusts the LED pulse width modulating signals is being reduced according to the backlight
Before value or at least one of pulse width, can also first obtain the corresponding backlight reduce ratio preset pulse width and
Preset amplitude.Wherein, the preset pulse width is the corresponding LED pulse width modulating signals of the content to be displayed
The backlight of pulse width reduces ratio, and the preset amplitude is the corresponding LED pulse widths modulation letter of the content to be displayed
Number amplitude backlight reduce ratio.The preset pulse width of ratio setting is reduced for backlight and preset amplitude enables to
When at least one of pulse-width or amplitude are adjusted, adjustment reference value can be used as so that adjustment is more convenient.
In some embodiments, one mode in pulse width and amplitude is adjusted, i.e., ratio is reduced according to the backlight
Example adjusts the pulse width or amplitude of the LED pulse width modulating signals.Pulse width adjustment can be specifically according to
Backlight reduces ratio and the pulse width of the LED pulse width modulating signals is shorten to preset pulse width；Range-adjusting
Can be specifically to reduce ratio according to the backlight amplitude of the LED pulse width modulating signals is reduced to preset width
Value.When can be seen that one in dull whole pulse width and amplitude, it is only necessary to directly adjust to corresponding preset pulse width
Or amplitude.It can realize quick adjustment, enhance the realizability of display backlight Poewr control method.
In some embodiments, the adjustment of only pulse-width also has another way, i.e., reduces ratio according to the backlight
Pulse width in the LED pulse width modulating signals is adjusted to the spaced subpulse width of at least two tools, institute by example
It is the preset pulse width to state the sum of pulse width of at least two subpulse width.In this mode, it is equivalent to and uses high frequency
Pulse replaces the pulse of the LED pulse width modulating signals of script so that a pulse of LED pulse width modulating signals becomes
Multiple subpulses, but the sum of pulse width of these subpulses is preset pulse width, after being equally reached adjustment
The pulse width of LED pulse width modulating signals and the product of amplitude are the pulse of the LED pulse width modulating signals before adjustment
The backlight of width and amplitude product reduces ratio this purpose.
In some embodiments, while the adjustment of pulse-width and amplitude can be, ratio is reduced according to the backlight
Shorten the pulse width of the LED pulse width modulating signals to more than the preset pulse width, and reduces the LED arteries and veins
Rush the amplitude of bandwidth modulation signals to more than the preset amplitude.I.e. in this mode, while by the value of pulse width and amplitude
Become smaller, to which the product of the pulse width and amplitude that reach adjustment is the backlight drop of the product of the pulse width and amplitude before adjustment
Low ratio.Enhance the realizability of display backlight Poewr control method.
In some embodiments, while the adjustment of pulse-width and amplitude is also possible that according to backlight reduction ratio
Example shortens the pulsewidth of the LED pulse width modulating signals to less than the preset pulse width, and increases the LED pulses
The amplitude of bandwidth modulation signals.In this mode, be by pulse width adjustment to less than preset pulse width, and in order to enable adjust
The product of whole pulse width and amplitude, which is the backlight of the product of the pulse width and amplitude before adjustment, reduces ratio, then needs pair
Amplitude is increased.The realizability of display backlight Poewr control method can be enhanced.
In some embodiments, while the adjustment of pulse-width and amplitude is also possible that according to backlight reduction ratio
The amplitude value that example reduces the LED pulse width modulating signals is less than the preset amplitude, and increases the LED pulse widths
The pulse width of modulated signal.In this mode, be by range-adjusting to less than preset amplitude, and in order to enable adjustment pulse
The product of width and amplitude, which is the backlight of the product of the pulse width and amplitude before adjustment, reduces ratio, then needs pulse-width
Increased.The realizability of display backlight Poewr control method can be enhanced.
The embodiment of the present application second aspect also provides a kind of liquid crystal display, should include LCD panel, with the LCD panel
The LCD drive integrated circults (Integrated circuit, abbreviation IC) for driving the LCD panel of electrical connection, it is described
The back side of LCD panel is additionally provided with LED backlight light source, and the driving LED backlight light source is also associated in the LED backlight light source
LED drives IC, the LCD drivings IC to be also connected with LED drivings IC, wherein
LCD drivings IC is used to obtain the LED pulse width modulating signals of the LCD；
LCD driving IC be additionally operable to using content correspond to backlight control CABC algorithms determine backlight reduction ratio, the backlight
Reduction ratio, which is the backlight of the backlight of the corresponding content to be displayed of the LED pulse width modulating signals, reduces ratio；
LCD drivings IC is additionally operable to reduce the amplitude that ratio adjusts the LED pulse width modulating signals according to the backlight
At least one of or pulse width, wherein the pulse width of LED pulse width modulating signals after adjustment and multiplying for amplitude
Product reduces ratio for the pulse width of the LED pulse width modulating signals before adjustment and the backlight of amplitude product；
LED drivings IC is used to drive the LED backlight light source to send out the back of the body according to the LED pulse width modulating signals after adjustment
Light；
LCD panel is for showing content to be displayed.
In some embodiments, LCD drives IC to be additionally operable to obtain preset pulse width and preset amplitude, described default
Pulse width and preset amplitude correspond to the content to be displayed backlight reduce ratio；Wherein, the preset pulse is wide
Degree, which is the backlight of the pulse width of the corresponding LED pulse width modulating signals of the content to be displayed, reduces ratio；It is described default
Amplitude be the corresponding LED pulse width modulating signals of the content to be displayed amplitude backlight reduce ratio.
In some embodiments, LCD drives IC to be specifically used for：Ratio is reduced according to the backlight, and the LED pulses is wide
The pulse width of degree modulated signal shorten to preset pulse width；Ratio is either reduced by the LED according to the backlight
The amplitude of pulse width modulating signal is reduced to preset amplitude.
In some embodiments, LCD drives IC to be specifically used for reducing ratio by the LED pulse widths according to the backlight
Pulse width in modulated signal is adjusted to the spaced subpulse width of at least two tools, at least two subpulses width
The sum of pulse width be the preset pulse width.
In some embodiments, LCD drives IC to be specifically used for wide according to the backlight reduction ratio shortening LED pulses
The pulse width of modulated signal to more than the preset pulse width are spent, and reduces the LED pulse width modulating signals
Amplitude to more than the preset amplitude.
In some embodiments, LCD drives IC to be specifically used for wide according to the backlight reduction ratio shortening LED pulses
The pulsewidth of modulated signal to less than the preset pulse width are spent, and increases the amplitude of the LED pulse width modulating signals.
In some embodiments, LCD drives IC to be specifically used for wide according to the backlight reduction ratio reduction LED pulses
The amplitude value for spending modulated signal is less than the preset amplitude, and increases the pulse width of the LED pulse width modulating signals.
The another aspect of the application provides a kind of computer readable storage medium, in the computer readable storage medium
It is stored with instruction, when run on a computer so that computer executes the method described in above-mentioned various aspects.
The another aspect of the application provides a kind of computer program product including instruction, when it runs on computers
When so that computer executes the method described in above-mentioned various aspects.
Description of the drawings
Fig. 1 is the schematic diagram of VR display systems；
Fig. 2 is grayscale transition diagram in liquid crystal display；
It is showing for the fast reaction LCD display high-speed motion pictures using black insertion technology of traditional LC D and VR shown in Fig. 3
It is intended to；
Fig. 4 is the schematic diagram that fast reaction LCD uses black insertion technology；
Fig. 5 a are the schematic diagrames that no black plug is always on display；
Fig. 5 b are the schematic diagrames for having black plug pulse to show；
Fig. 6 is the configuration diagram of the liquid crystal display of the embodiment of the present application；
Fig. 7 is the configuration diagram of the liquid crystal display of the embodiment of the present application；
Fig. 8 is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application；
Fig. 9 is the schematic diagram using CABC dynamic backlight adjusting displayed contents；
Figure 10 is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application；
Figure 11 is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application；
Figure 12 is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application；
Figure 13 is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application.
Specific implementation mode
The embodiment of the present application provides backlight power control method and the liquid crystal display of a kind of liquid crystal display to solve
Quickly the backlight of LCD consumes high problem at present.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
The embodiment of the present application is described in attached drawing.
Term " first ", " second ", " third " in the description and claims of this application and above-mentioned attached drawing, "
The (if present)s such as four " are for distinguishing similar object, without being used to describe specific sequence or precedence.It should manage
The data that solution uses in this way can be interchanged in the appropriate case, so that the embodiments described herein can be in addition to illustrating herein
Or the sequence other than the content of description is implemented.In addition, term " comprising " or " having " and its any deformation, it is intended that covering is not
Exclusive includes, for example, contain the process of series of steps or unit, method, system, product or equipment be not necessarily limited to it is clear
Step or unit those of are listed in ground, but may include not listing clearly or for these processes, method, product or set
Standby intrinsic other steps or unit.
It is main in such a way that head is aobvious at present in the field virtual reality (Virtual Reality, VR), i.e., in a head
Show that different two images, the different image of this two width are equal to two respectively by the way that one piece or two pieces of display screens is arranged in aobvious
It is driven by the display chip of the display screen, two images have fine distinction, and similar to the binocular parallax of people, human eye arrives the difference
It is emulated by the virtual image of lens one amplification of generation between display screen, to generate the feeling of immersion of real world, specifically,
Referring to Fig. 1, Fig. 1 is the schematic diagram of VR display systems, the distance between human eye 101 to eyepiece 102 is L1, and eyepiece 102 arrives aobvious
The distance between display screen 103 is L2, and the distance of human eye 101 to virtual image face 104 is L3, i.e. the L3 in 101 front of human eye of people's perception
The picture generated at distance, the wherein eyepiece 102 can be Fresnel Lenses also known as Fresnel lens, mostly be by polyolefine material
Thin slice made of injection pressure also has glass to make, and lens surface one side is smooth surface, ascending concentric of another side imprinting
Circle, its texture are that the interference according to light and disturbing is penetrated and relative sensitivity and receiving angle requirement design, and can be solved
Dimmed, the fuzzy phenomenon in common convex lens corner.
When being moved to different directions with VR aobvious human body heads, the change in moving process can be shown on display screen
The image of change, for example, can be shown when head moves downward, on display screen one by animation simulation human eye from left to right in true generation
The visual variation that boundary can be appreciated that.However due to being the movement even picture of high-speed mobile, shown on traditional LCD such
When content, picture, which has serious smear, to be existed, and the user using VR can be caused to lead to the problem of dizzy and nauseous, so VR heads
Aobvious in general use is the fast reaction liquid crystal display with backlight black insertion technology, and the conversion reaction event of most slow rank is
5~6 milliseconds.As shown in Fig. 2, Fig. 2 is grayscale transition diagram in liquid crystal display, abscissa is the time wherein in figure, indulges and sits
It is designated as grayscale percentage, even to have 256 ranks, black be 0% position to grayscale to white from black, and white is 100% position.Song in figure
Line indicates that liquid crystal is transformed into grayscale M from grayscale N, then is transformed into the process of grayscale N from grayscale M, with Gray (N) table in grayscale N Fig. 2
Show, indicated with Gray (M) in grayscale M Fig. 2, it is the single order in 256 rank grayscale that wherein N, which is less than M, N and M, and Tr is grayscale N to ash
The reaction time of rank M, Tf are the reaction time of grayscale M to grayscale N.
It is the fast reaction LCD display high-speed motion pictures using black insertion technology of traditional LC D and VR as shown in Figure 3
Schematic diagram, it can be seen that the smear of traditional LC D uses the smear of the fast reaction LCD of black insertion technology almost not have than more serious
Have.Wherein, impulse type is can reach using backlight black insertion technology, to be greatly reduced compared to the smear for being always on display, specifically may be used
It is the schematic diagram that fast reaction LCD uses black insertion technology referring to Fig. 4, Fig. 5 a and Fig. 5 b, Fig. 4, Fig. 5 a are that no black plug is always on display
Schematic diagram；Fig. 5 b are the schematic diagrames for having black plug pulse to show；In Fig. 4, the P1 stages indicate that backlight dwell period, P2 stages indicate
Backlight open stage, the S1 stages in the P1 stages are the sweep phases of data, in the stage, can determine whether that each pixel needs to show
Grayscale voltage；The S2 stages in the P1 stages are liquid crystal response operation parts after the completion of data scanning；In the portion
It can need gray scale voltage to be shown that liquid crystal is turned to corresponding angle according to each pixel in data scanning stage.Complete this
After two parts operation, you can the execution P2 stages open backlight and shown；The P1 stages add the P2 stages to indicate the duration of a frame,
It can be seen that each frame picture includes backlight close session and backlight open section, Vsync indicates the synchronization of each frame, for example,
The length of backlight open section is 1/10th of an auspicious display time.
As can be seen that the actually data scanning stage and liquid crystal response stage is the part that need not be seen by the user, i.e.,
This part carries out in the case of being not turned on backlight, and black insertion technology is carried out using this feature.
Each lattice indicates that a pixel, Fig. 5 a are the display modes of no black plug in Fig. 5 a and Fig. 5 b, and Fig. 5 b are to use
The display mode of 50% black plug, in comparison diagram 5a and Fig. 5 b as can be seen that in the case of same frame, no black plug is always on display
Smear length has 4 pixels, and the smear length of the pulse display mode of 50% black plug is used to only have 2 pixels.
In addition, for traditional LCD, the backlight power consumption for reducing LCD also has ambient light detecting to adapt to backlight control
(Light Adaptive Brightness Control, abbreviation LABC) and CABC two ways, brightness are adaptively commonly used in
Ambient light is adapted to, is taken less than substantially in the case of VR systems, CABC technologies are by identifying content, and according to content to backlight
It is controlled.
Wherein, what CABC dynamic backlights were adjusted is to adjust backlight according to the content being particularly shown.By to be shown
Content is analyzed, and backlight illumination is reduced, while in order to ensure the content of display and not carry out the effect before CABC adjustment
It is essentially identical, then the penetrance of grayscale in Suitable content is needed to carry out luminance compensation.For liquid crystal display, human eye sense
The display brightness for the liquid crystal display being subject to is to be multiplied by the penetrance of grayscale by the light emission luminance of LED backlight light source to obtain.Its
In certain level-one grayscale the corresponding voltage of i.e. this grade of grayscale of penetrance.
For example, the brightness of LED backlight light source is 1000 units, and the penetrance of X grades of grayscale is 60%, the value of the X
Between being 0 to 255, then the display brightness of final liquid crystal display is 600 units.Find that backlight can drop if being calculated by CABC
As low as 80%, i.e. backlight becomes 800 units, and in order to enable final display brightness remains as 600 units, then it needs to X grades
The penetrance of grayscale is adjusted, if penetrance is adjusted to 75% (adjustment really to voltage), then final liquid crystal display
Display brightness be 800 units be multiplied by 75%, remain as 600 units.To reach in the case where not losing display brightness, drop
The light emission luminance of low LED backlight light source.
When using CABC, the function of increasing content analysis on LCD drivings IC is needed, increasing the function can be by soft
Part realizes the function that can also realize content analysis by increasing specific content analysis circuit in driving IC in LCD.CABC's
Specific work process is as follows：
Content to be displayed (such as image data) is sent from application processor to LCD drivings IC first, by content analysis work(
The image data can be analyzed, and determines that backlight reduces ratio according to certain rule.The rule for example analyzes the image data
In, dark-coloured or black portions ratios are more than certain proportion, then backlight reduction ratio are set as a fixed value；Certainly should
Rule can be preset in design content analytic function or circuit, in addition, in the LCD drives IC, is also stored with the back of the body
Light reduces the correspondence of the penetrance adjustment of ratio and grayscale.Then, after determining backlight reduction ratio, just according to backlight
The correspondence of the penetrance of reduction ratio and grayscale adjustment carries out the penetrance adjustment of grayscale, and last LCD drivings IC drives LCD
Panel shows content to be shown with the penetrance of the grayscale after the adjustment, and the back light of LCD driving IC drivings LCD is pressed
Reducing ratio according to backlight reduces backlight illumination so that the effect of the effect of the picture finally shown and the picture before progress CABC
It is basically the same.And due to reducing the brightness of back light, electric quantity consumption can be reduced.Therefore, this CABC technologies
It is suitable for use in using battery as in the mobile device of power supply.
Since the characteristics of fast reaction liquid crystal display, determines that its backlight power consumption can be relatively high, in order to solve the problems, such as this, this
Application embodiment provides a kind of backlight power control method i.e. liquid crystal display of fast reaction liquid crystal display to solve to carry on the back
Light power consumption can be relatively high problem.The framework of the liquid crystal display of the application is illustrated first, referring to Fig. 6, Fig. 6 is this
Apply for the configuration diagram of the liquid crystal display display screen of embodiment.The liquid crystal display include LCD panel and be arranged in LCD
The LED backlight light source of back side of panel, wherein LCD driving IC are connected in LCD panel, LED backlight light source is connected with driving should
The LED of LED backlight light source drives IC, LCD drivings IC to be additionally coupled to LED drivings IC.The specific work process of this liquid crystal display
Can be that LCD drives IC to receive content to be displayed, LCD drives IC to generate pwm signal, the pwm signal is then sent to LED
Drive IC, LED that IC is driven to drive LED to shine according to the pwm signal.
It should be noted that LED driving IC and LCD drivings IC can be arranged in different function modules, specifically, can
It is the configuration diagram of the liquid crystal display display screen of the embodiment of the present application refering to Fig. 7, Fig. 7, wherein main board is equipped with
It can be WLED (white LED) driving IC that MPU or CPU and LED, which drives IC, LED drivings IC, and on LCD modules then
IC is driven equipped with LCD panel, LCD and multiple LED at the LCD panel back side are set, and certainly, these LED can also be WLED.
The specific work process can be that MPU or CPU send content to be shown to LCD drivings IC, and then on the one hand LCD drives IC
It generating pwm signal and is sent to LED driving IC, another aspect LCD drivings IC can also be exported according to content to be displayed to LCD panel,
Then, LED drives IC after receiving pwm signal, while can adjust the electric current inputted to LED so that LED shines.
Below to the backlight power control method of the liquid crystal display of the embodiment of the present application, the liquid crystal of the embodiment of the present application
The backlight power control method of display screen can be used in Fig. 6 or liquid crystal display framework shown in Fig. 7.Below to be based on Fig. 6 institutes
For showing framework, the backlight power control method of the liquid crystal display of the embodiment of the present application is illustrated.Referring to Fig. 8, Fig. 8
It is one embodiment figure of the backlight power control method of the liquid crystal display of the embodiment of the present application, this method may include：
801, LCD drivings IC obtains the LED pulse width modulating signals of the LCD.
Wherein, black insertion technology is used in the liquid crystal display, therefore the LED signal of output to LED backlight light source is LED
Pulse width modulating signal, the pulse width of the pulse width modulating signal are the duration of the backlight open in the duration of a frame.
Wherein, PWM is controlled the break-make of inverter circuit switching device, so that output end is obtained a series of amplitudes equal
Pulse control mode.If being adjusted to the width of each pulse of pwm signal by certain rule in the case of not changing amplitude
System, that is, the duty ratio for adjusting pulse are the size of changeable inverter circuit output voltage, and the adjustment of certain pulse width can also
Change the output frequency of pwm signal.
It is to change forward current by being opened and closed periodically LED in such a way that PWM technologies carry out LED light modulations
Turn-on time control the bright dark time of LED；Since the brightness of human eye perception is an accumulation, i.e., in a cycle
It is interior, bright LED time it is shared in whole cycle ratio it is bigger, human eye can feel brighter.If the bright dark frequencies of LED are more than
100Hz, then seen by person is exactly average brightness, rather than LED is flickering, at this time in the case where amplitude is constant, to arteries and veins
When rushing width and being adjusted, increasing pulse width will make human eye perceived brightness increase, conversely, then can perceived brightness reduce.
Using PWM light modulation liquid crystal display LED backlight light source working frequency generally in 200Hz-1000Hz or so, due to PWM
Luminous essence is the process of " bright-to go out-bright-go out ", is equivalent to visible light and is impacted in the flicker for carrying out certain frequency to human eye, when
PWM frequency is higher, that is, the frequency flickered is higher, weaker to the perception of impact to human eye；Brightness simultaneously is higher, can also reduce people
Perception of the eye to the impact of this flashing type.
As it can be seen that PWM dimming modes are different from the size of current by changing LED to change the linearity light adjusting side of LED luminance
Formula, PWM light modulations only make LED discontinuously work, bright so as to just change LED in the case where not changing size of current
Degree.
It should be noted that for LCD, due to the difference of refresh rate, the duration of a frame is also not quite similar, such as
The refresh rate of LCD is set as 60hz, indicates to redraw the image shown on 60 LCD in, and the duration of a frame at this time is then 1/
60 seconds, similarly, if the refresh rate of LCD is 90hz, then it represents that redraw within one second the image shown on 90 LCD, at this time a frame
Duration then becomes 1/90 second.Certainly, for the fields VR, the higher the better for refresh rate, in the case of low refresh rate, as 60hz is seen
To picture will appear and significantly flicker unstable situation, and such case will appear eye hardly possible plus scene with visual angle movement
By the symptoms such as dizzy.For the LCD in the embodiment of the present application, refresh rate can be the LCD for being more than 90hz, can effectively drop
Low above-mentioned symptom.
802, LCD drives IC to determine that backlight reduces ratio using CABC algorithms.
Wherein, which reduces the backlight for the backlight that ratio is the corresponding content to be displayed of LED pulse width modulating signals
Reduction ratio, which can adjust backlight in real time according to content to be shown reduces ratio, is illustrated below citing
For, referring to Fig. 9, Fig. 9 is the schematic diagram using CABC dynamic backlight adjusting displayed contents.Wherein, the first image 901 is original
Beginning picture, the second image 903 carry out the penetrance of grayscale corresponding to find that 30% backlight illumination can be reduced after content analysis
Be adjusted to script 10/7；First backlight illumination 902 is original backlight illumination, and the second backlight illumination 903 is then by interior
After holding analysis, backlight illumination can be dimmed the backlight illumination after 30% by discovery, and third image 905 is the tune in conjunction with grayscale penetrance
It is whole for script 10/7 and when backlight illumination is adjusted to the second backlight illumination 903 finally in the figure of liquid crystal display screen display
Picture, the display effect of third image 905 and the display effect of the first image 901 are essentially identical.
It should be noted that it is schematical, the reduction of 30% power consumption that the reduction of 30% power consumption, which corresponds to grayscale to be turned up 30%,
The grayscale that the picture might not be corresponded to is turned up 30%, can determine that grayscale is turned up with the actual content of the image in actual conditions
Ratio, similarly, for LED backlight light source, it is also schematical that lower power consumption 30%, which corresponds to backlight illumination and dims 30%, and
Actually lower power consumption 30% also not necessarily corresponds to backlight illumination and dims 30%, and the ratio specifically dimmed is according to LED backlight light source
Difference and it is different.
803, LCD drives IC to reduce amplitude or pulse width that ratio adjusts LED pulse width modulating signals according to backlight
At least one of.
It wherein, can basis after the backlight reduction ratio by the backlight of CABC technical limit spacings content to be displayed
The ratio adjust LED pulse width modulating signals amplitude or pulse width at least one of, and so that after adjustment
The pulse width of LED pulse width modulating signals and the product of amplitude are the pulse of the LED pulse width modulating signals before adjustment
The backlight of width and amplitude product reduces ratio.That is, it is 70% that if backlight, which reduces ratio, i.e. backlight is reduced to former backlight
70%, at this point, pulse width and the amplitude product of the LED pulse width modulating signals after adjustment are that LED pulses before adjusting are wide
Spend the 70% of the pulse width of modulated signal and the product of amplitude.Wherein, the duration of pulse width actually backlight lightening, and width
Current value when value is actually backlight lightening, the i.e. product are physically the product of electric current and time.
It should be noted that the minimum duration unit of CABC adjustment can be the duration of a frame, and liquid crystal display
The LED pulse width modulating signals to be sent obtained are then the LED pulse width modulating signals for including continuous at least one frame.
That is, different CABC adjustment may be used in the different frame on a LED pulse width modulating signal, to reach root
Adjusting backlight in real time according to content to be shown reduces the effect of ratio.
Optionally, also set up in liquid crystal display reduces the corresponding preset pulse width of ratio and preset width with backlight
There are many acquisition modes for value, the preset pulse width and preset amplitude, such as the preset pulse width and preset amplitude
It is stored directly on LED drivings IC, it is of course also possible to which being stored in LED drivings IC can read on the memory of data, specifically
Mode is simultaneously not construed as limiting.The preset pulse width is the arteries and veins of the corresponding LED pulse width modulating signals of the content to be displayed
Rushing the backlight of width reduces ratio；The product of pulse width and amplitude is made to reach backlight that is, being equivalent to only adjustment pulse width
Reduction ratio；The preset threshold value is that the preset amplitude is the corresponding LED pulse widths modulation letter of the content to be displayed
Number amplitude backlight reduce ratio, that is, be equivalent to only adjustment amplitude make the product of pulse width and amplitude reach backlight drop
Low ratio.
With preset pulse width and on the basis of preset amplitude, liquid crystal display reduces ratio according to the backlight
The amplitude of example adjustment LED pulse width modulating signals and/or the mode of pulse width can have following several classes, carry out separately below
Explanation.
The first kind is only adjusted pulse width.With the different situation of two classes in such mode, the first situation be by
Pulse width shortens.It is for second at least two subpulse generations by there is spacing than LED pulse width modulating signal higher frequencies
For a pulse of script.It is illustrated below：
The first, pulse width is shortened.At this point, step 803 can be changed to reduces ratio by LED pulse widths according to backlight
The pulse width of modulated signal shorten to preset pulse width.Only pulse width is contracted that is, directly reducing ratio according to backlight
Short is preset pulse width, without adjusting amplitude.It is the embodiment of the present application for details, reference can be made to Figure 10 and Figure 11, Figure 10
One embodiment figure of the backlight power control method of liquid crystal display, Figure 11 are the back ofs the body of the liquid crystal display of the embodiment of the present application
One embodiment figure of light power control method, the wherein Figure 10 and Figure 11 indicate the timing chart of the duration of two frames, two
In figure by taking backlight reduction ratio is 70% as an example, abscissa is the time, and ordinate is electric current；After wherein solid line indicates adjustment
LED pulse width modulating signals, dotted line then indicate the LED pulse width modulating signals before adjustment；The difference of Figure 10 and Figure 11 exists
It is slightly different in actual adjustment mode, is to fix the rising edge of pulse in Figure 10, failing edge is shifted to an earlier date, to reach pulse
The product of width and amplitude is the 70% of the product of the pulse width and amplitude before adjustment；And then fix failing edge in Figure 11,
And lag rising edge, it can equally realize that the product of pulse width and amplitude is the product of the pulse width and amplitude before adjustment
70%.
Second, by there is at least two subpulses of spacing to replace originally than LED pulse width modulating signal higher frequencies
A pulse.Step 603 can be changed to reduces ratio by the pulse in the LED pulse width modulating signals according to the backlight
Width adjustment is at least two spaced subpulse width of tool, and the pulse width of at least two subpulses width it
With for the preset pulse width.It is the LED pulses before adjustment to be equivalent to the sum of width of width of at least two subpulses
The 70% of the pulse width of bandwidth modulation signals.For details, reference can be made to the liquid crystal displays that Figure 12, Figure 12 are the embodiment of the present application
One embodiment figure of backlight power control method, the wherein Figure 12 indicate the timing chart of the duration of two frames, in Figure 12
By taking backlight reduction ratio is 70% as an example, abscissa is the time, and ordinate is electric current；It is putting for the pulse of first frame below Figure 12
Big schematic diagram, wherein solid line indicate that the LED pulse width modulating signals after adjustment, dotted line then indicate that the LED pulses before adjustment are wide
Spend modulated signal；As can be seen that by the way that a pulse is adjusted to the identical subpulse of multiple amplitudes, the spacing of these subpulses
It does not limit, as long as the pulse that the sum of the pulse width of these subpulses reaches the LED pulse width modulating signals before adjustment is wide
Degree 70%, you can reach these subpulses pulse width and amplitude product and accumulated result be adjust before arteries and veins
Rush the 70% of the product of width and amplitude.
Second class, is only adjusted amplitude.At this point, step 603 can be changed to according to backlight reduction ratio that LED pulses is wide
The amplitude of degree modulated signal is reduced to preset amplitude.That is, directly reduce ratio according to backlight is reduced to preset width by amplitude
Value, without adjusting pulse width.For details, reference can be made to the backlight work(that Figure 13, Figure 13 are the liquid crystal display of the embodiment of the present application
One embodiment figure of rate control method, the wherein Figure 13 indicate the timing chart of the duration of two frames, with backlight in Figure 13
For reduction ratio is 70%, abscissa is the time, and ordinate is electric current；Wherein solid line indicates the LED pulse widths after adjustment
Modulated signal, dotted line then indicate the LED pulse width modulating signals before adjustment；As can be seen that amplitude is directly reduced to 70%,
The product that can reach pulse width and amplitude is the 70% of the product of the pulse width and amplitude before adjustment.
Third class, while pulse-width and amplitude are adjusted, it, can be there are three types of different feelings when two kinds are adjusted simultaneously
Shape, the first is that the amplitude that the pulse width after adjustment is more than after preset pulse width and adjustment is more than preset amplitude.The
Two kinds to be amplitude before the opposite adjustment of amplitude after pulse width after adjustment is less than preset pulse width and adjusts have increase.
The third be adjustment after pulse width relative to the pulse width before adjustment have increase and adjust after amplitude be less than it is preset
Amplitude.
It should be noted that from the various situations in the first kind and the second class it can be found that whether adjust before or
The product of pulse width and amplitude after adjustment actually indicates the area of pulse.The ratio of area before adjustment and after adjustment is straight
Connect with backlight reduce ratio it is corresponding, for example, backlight reduce ratio be 70%, actually by the LED pulse widths before adjustment
The area of one pulse of modulated signal is reduced to original 70%.It, can be to the area on the basis of this mode
Two dimensions adjust, i.e. pulse width and amplitude.Therefore, in three kinds of situations in third class situation, the first is originally
On the basis of in such a way that pulse width and amplitude are turned down so that area meets for 70% demand before adjustment, the
Two kinds be then on the basis of script chopped pulse width and increase amplitude make area meet for adjustment before 70% demand.
The third is then to increase pulse width on the basis of script and reduce amplitude area to be met for 70% need before adjustment
It asks.
804, the LED pulse width modulating signals after LCD drives IC to drive IC output adjustments to LED.
It is understood that LED drives IC after the adjustment for completing LED pulse width modulating signals, it can be by the adjustment
LED pulse width modulating signals afterwards are sent to LED drivings IC so that LED drives IC driving LED backlight light sources to shine.
805, LED drives IC to be shone according to the LED pulse width modulating signals control LED backlight light source after adjustment.
It is understood that LED drives IC after the LED pulse width modulating signals after receiving adjustment, meeting basis should
LED pulse width modulating signals after adjustment are to LED backlight light source according to the pulse of the LED pulse width modulating signals after adjustment
It is powered so that LED backlight light source sends out backlight according to the LED pulse width modulating signals after adjustment.
806, LED backlight light source sends out backlight according to the LED pulse width modulating signals after adjustment.
Wherein, after the adjustment for completing LED pulse width modulating signals, you can send out the LED pulse width modulating signals
It send to LED backlight light source, backlight is sent out according to LED pulse width modulating signals after the adjustment by LED backlight light source, so that
The content to be displayed that LCD is shown with according to the LED pulse width modulating signals before adjustment send out backlight display go out it is to be shown
The effect of content is almost the same, i.e., the loss of image displaying quality is in preset acceptable range.
Furthermore, it is necessary to explanation, embodiment illustrated in fig. 8 is the backlight power control method using the embodiment of the present application
A kind of realization method of liquid crystal display, in the liquid crystal display of the embodiment of the present application, in addition to using Fig. 6 or shown in Fig. 7
Liquid crystal display framework, LCD drive IC to determine that backlight reduces ratio by CABC algorithms, and to LED pulse width modulating signals
It, can be with individually designed one piece adjustment IC, referring to Fig. 10, being the IC companies of the embodiment of the present application shown in Figure 10 except being adjusted
Connect schematic diagram, wherein adjustment IC be located at LCD driving IC and LED driving IC between, when liquid crystal display works, first by
LCD drives IC to generate LED pulse width modulating signals can lead to while adjustment IC receives the LED pulse width modulating signals
It crosses CABC algorithms and determines that backlight reduces ratio, then the pulse width and amplitude of the LED pulse width modulating signals are adjusted
It is whole, the LED pulse width modulating signals after being adjusted, then send it to LED drivings IC.
It should be noted that adjustment IC can be exclusively for CABC algorithms and adjustment LED pulse width modulating signals
The chip of design, which can also be another LCD driving IC, LCD drivings IC, can receive the LED that previous LCD drivings IC is sent out
Pulse width modulating signal.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or its arbitrary combination real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.
The computer program product includes one or more computer instructions.Load and execute on computers the meter
When calculation machine program instruction, entirely or partly generate according to the flow or function described in the embodiment of the present invention.The computer can
To be all-purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction can be deposited
Storage in a computer-readable storage medium, or from a computer readable storage medium to another computer readable storage medium
Transmission, for example, the computer instruction can pass through wired (example from a web-site, computer, server or data center
Such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave) mode to another website
Website, computer, server or data center are transmitted.The computer readable storage medium, which can be computer, to be deposited
Any usable medium of storage is either set comprising data storages such as one or more usable mediums integrated server, data centers
It is standby.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or partly lead
Body medium (such as solid state disk Solid State Disk (SSD)) etc..
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
It closes or communicates to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in the embodiment of the present application can be integrated in a processing unit, can also be each
A unit physically exists alone, can also be during two or more units are integrated in one unit.Above-mentioned integrated unit was both
The form that hardware may be used is realized, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the application
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (Read-Only Memory,
ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can store program
The medium of code.
The above, above example are only to illustrate the technical solution of the application, rather than its limitations；Although with reference to before
It states embodiment the application is described in detail, those skilled in the art should understand that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified or equivalent replacement of some of the technical features；And these are changed
Or it replaces, each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution and range.
Claims (16)
1. a kind of backlight power control method of liquid crystal display, which is characterized in that including：
Liquid crystal display LCD obtains the Light-emitting diode LED pulse width modulating signal of the LCD；
The LCD corresponds to backlight control CABC algorithms using content and determines that backlight reduces ratio, and it is institute that the backlight, which reduces ratio,
Stating the backlight of the backlight of the corresponding content to be displayed of LED pulse width modulating signals reduces ratio；
The LCD according to the backlight reduce ratio adjust the LED pulse width modulating signals amplitude or pulse width it
At least one of, wherein before the pulse width of the LED pulse width modulating signals after adjustment and the product of amplitude are adjustment
The pulse width of LED pulse width modulating signals and the backlight of amplitude product reduce ratio；
LED backlight light source in the LCD sends out backlight according to the LED pulse width modulating signals after adjustment.
2. the backlight power control method of liquid crystal display according to claim 1, which is characterized in that the LCD according to
Before the backlight reduction ratio adjusts at least one of amplitude or pulse width of the LED pulse width modulating signals,
The method further includes：
The LCD obtains preset pulse width and preset amplitude, and the preset pulse width and preset amplitude correspond to
The backlight reduces ratio；Wherein, the preset pulse width is the corresponding LED pulse widths modulation of the content to be displayed
The backlight of the pulse width of signal reduces ratio；The preset amplitude is the corresponding LED pulse widths of the content to be displayed
The backlight of the amplitude of modulated signal reduces ratio.
3. the backlight power control method of liquid crystal display according to claim 2, which is characterized in that described in the basis
Backlight reduction ratio adjusts the pulse width of the LED pulse width modulating signals or amplitude includes：
Reducing ratio according to the backlight, that the pulse width of the LED pulse width modulating signals shorten to preset pulse is wide
Degree；Or,
Ratio is reduced according to the backlight, and the amplitude of the LED pulse width modulating signals is reduced to preset amplitude.
4. the backlight power control method of liquid crystal display according to claim 3, which is characterized in that according to the backlight
The pulse width of the LED pulse width modulating signals is shorten to preset pulse width by reduction ratio：
Ratio is reduced according to the backlight, and the pulse width in the LED pulse width modulating signals is adjusted at least two tools
Spaced subpulse width, the sum of pulse width of at least two subpulses width are the preset pulse width.
5. the backlight power control method of liquid crystal display according to claim 2, which is characterized in that described in the basis
Backlight reduction ratio adjusts the pulse width of the LED pulse width modulating signals and amplitude includes：
Ratio, which is reduced, according to the backlight shortens the pulse width of the LED pulse width modulating signals to more than described preset
Pulse width, and reduce the amplitude of the LED pulse width modulating signals to more than the preset amplitude.
6. the backlight power control method of liquid crystal display according to claim 2, which is characterized in that described in the basis
Backlight reduction ratio adjusts the pulse width of the LED pulse width modulating signals and amplitude includes：
Ratio, which is reduced, according to the backlight shortens the pulsewidth of the LED pulse width modulating signals to less than the preset pulse
Width, and increase the amplitude of the LED pulse width modulating signals.
7. the backlight power control method of liquid crystal display according to claim 2, which is characterized in that described in the basis
Backlight reduction ratio adjusts the pulse width of the LED pulse width modulating signals and amplitude includes：
Ratio, which is reduced, according to the backlight reduces the amplitude value of the LED pulse width modulating signals less than the preset width
Value, and increase the pulse width of the LED pulse width modulating signals.
8. a kind of liquid crystal display, which is characterized in that including liquid crystal display LCD panel, the use being electrically connected with the LCD panel
In the LCD drive integrated circults IC for driving the LCD panel, the back side of the LCD panel is additionally provided with Light-emitting diode LED backlight
Light source is also associated in the LED backlight light source and the LED of the LED backlight light source is driven to drive IC, and the LCD drivings IC is also
It is connected with LED drivings IC, wherein
The LCD drivings IC is used to obtain the LED pulse width modulating signals of the LCD；
LCD driving IC, which is additionally operable to correspond to backlight control CABC algorithms using content, determines backlight reduction ratio, the backlight
Reduction ratio, which is the backlight of the backlight of the corresponding content to be displayed of the LED pulse width modulating signals, reduces ratio；
The LCD drivings IC is additionally operable to reduce the amplitude that ratio adjusts the LED pulse width modulating signals according to the backlight
At least one of or pulse width, wherein the pulse width of LED pulse width modulating signals after adjustment and multiplying for amplitude
Product reduces ratio for the pulse width of the LED pulse width modulating signals before adjustment and the backlight of amplitude product；
The LED drivings IC is used to drive the LED backlight light source to send out the back of the body according to the LED pulse width modulating signals after adjustment
Light；
The LCD panel is for showing content to be displayed.
9. liquid crystal display according to claim 8, which is characterized in that the LCD drivings IC is additionally operable to：
Preset pulse width and preset amplitude are obtained, waits showing described in the preset pulse width and preset amplitude correspondence
Show that the backlight of content reduces ratio；Wherein, the preset pulse width is the corresponding LED pulse widths of the content to be displayed
The backlight of the pulse width of modulated signal reduces ratio；The preset amplitude is the corresponding LED pulses of the content to be displayed
The backlight of the amplitude of bandwidth modulation signals reduces ratio.
10. liquid crystal display according to claim 9, which is characterized in that the LCD drivings IC is specifically used for：
Reducing ratio according to the backlight, that the pulse width of the LED pulse width modulating signals shorten to preset pulse is wide
Degree；Or,
Ratio is reduced according to the backlight, and the amplitude of the LED pulse width modulating signals is reduced to preset amplitude.
11. liquid crystal display according to claim 10, which is characterized in that the LCD drivings IC is specifically used for：
Ratio is reduced according to the backlight, and the pulse width in the LED pulse width modulating signals is adjusted at least two tools
Spaced subpulse width, the sum of pulse width of at least two subpulses width are the preset pulse width.
12. liquid crystal display according to claim 9, which is characterized in that the LCD drivings IC is specifically used for：
Ratio, which is reduced, according to the backlight shortens the pulse width of the LED pulse width modulating signals to more than described preset
Pulse width, and reduce the amplitude of the LED pulse width modulating signals to more than the preset amplitude.
13. liquid crystal display according to claim 9, which is characterized in that the LCD drivings IC is specifically used for：
Ratio, which is reduced, according to the backlight shortens the pulsewidth of the LED pulse width modulating signals to less than the preset pulse
Width, and increase the amplitude of the LED pulse width modulating signals.
14. liquid crystal display according to claim 9, which is characterized in that the LCD drivings IC is specifically used for：
Ratio, which is reduced, according to the backlight reduces the amplitude value of the LED pulse width modulating signals less than the preset width
Value, and increase the pulse width of the LED pulse width modulating signals.
15. a kind of computer readable storage medium, including instruction, when run on a computer so that computer executes such as
Method described in claim 1-7 any one.
16. a kind of computer program product including instruction, when run on a computer so that computer executes such as right
It is required that the method described in 1-7 any one.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/089962 WO2019000157A1 (en) | 2017-06-26 | 2017-06-26 | Method for controlling backlight power of liquid crystal display and liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108780627A true CN108780627A (en) | 2018-11-09 |
| CN108780627B CN108780627B (en) | 2020-11-27 |
Family
ID=64034074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780013528.4A Active CN108780627B (en) | 2017-06-26 | 2017-06-26 | Backlight power control method of liquid crystal display screen and liquid crystal display screen |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108780627B (en) |
| WO (1) | WO2019000157A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883071A (en) * | 2020-08-12 | 2020-11-03 | 深圳创维－Rgb电子有限公司 | Backlight compensation method and device, display equipment and readable storage medium |
| CN112185310A (en) * | 2019-07-05 | 2021-01-05 | 精工爱普生株式会社 | Display driver, electro-optical device, electronic apparatus, and moving object |
| WO2022041073A1 (en) * | 2020-08-27 | 2022-03-03 | 南京英维尔科技服务有限公司 | Backlight device control method and apparatus for head-mounted device |
| WO2022041072A1 (en) * | 2020-08-27 | 2022-03-03 | 南京英维尔科技服务有限公司 | Backlight apparatus control circuit for head-mounted device |
| WO2022217698A1 (en) * | 2021-04-12 | 2022-10-20 | Tcl华星光电技术有限公司 | Display panel driving method and device, and display terminal |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161065A (en) * | 2015-09-30 | 2015-12-16 | 深圳市华星光电技术有限公司 | LCD signal control circuit, display panel and display device |
| CN204991104U (en) * | 2015-07-31 | 2016-01-20 | 深圳市小行星科技有限公司 | Vehicle mounted LCD display |
| CN105489171A (en) * | 2016-01-14 | 2016-04-13 | 青岛海信电器股份有限公司 | Liquid crystal display device and backlight control method thereof |
| CN105575342A (en) * | 2016-03-18 | 2016-05-11 | 青岛海信电器股份有限公司 | Backlight source brightness control method and device and liquid crystal display equipment |
| CN105632421A (en) * | 2016-03-18 | 2016-06-01 | 青岛海信电器股份有限公司 | Backlight brightness control method and device and liquid crystal display device |
| JP2017041401A (en) * | 2015-08-21 | 2017-02-23 | 京セラドキュメントソリューションズ株式会社 | Electric apparatus |
| WO2017152463A1 (en) * | 2016-03-08 | 2017-09-14 | 深圳市华星光电技术有限公司 | Backlight dimming circuit and liquid crystal display |
| WO2018103357A1 (en) * | 2016-12-08 | 2018-06-14 | 青岛海信电器股份有限公司 | Method and device for generating backlight control signal in liquid crystal display device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001108962A (en) * | 1999-10-04 | 2001-04-20 | Hitachi Ltd | Liquid crystal display device and driving method therefor |
| KR20070095367A (en) * | 2004-12-27 | 2007-09-28 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Scanning backlight for lcd |
| CN101656049B (en) * | 2008-08-18 | 2012-11-21 | 北京京东方光电科技有限公司 | Device and method for controlling brightness of backlight source |
| CN101500361B (en) * | 2009-03-03 | 2012-07-04 | 友达光电股份有限公司 | LED driving apparatus and driving method thereof |
| KR101289651B1 (en) * | 2010-12-08 | 2013-07-25 | 엘지디스플레이 주식회사 | Liquid crystal display and scanning back light driving method thereof |
| TWI460714B (en) * | 2011-12-27 | 2014-11-11 | Himax Media Solutions Inc | System and a method of adaptively controlling an led backlight |
| US9142041B2 (en) * | 2013-07-11 | 2015-09-22 | Pixtronix, Inc. | Display apparatus configured for selective illumination of low-illumination intensity image subframes |
| CN105469747B (en) * | 2014-08-25 | 2019-08-16 | 深圳富泰宏精密工业有限公司 | Electronic device and its backlight drive circuit |
| CN105321478B (en) * | 2015-12-09 | 2019-04-26 | 武汉华星光电技术有限公司 | Backlight drive circuit, liquid crystal display and backlight adjusting method |
| CN106384577B (en) * | 2016-12-14 | 2019-03-01 | 维沃移动通信有限公司 | A kind of backlight adjusting method and mobile terminal of display screen |
-
2017
- 2017-06-26 WO PCT/CN2017/089962 patent/WO2019000157A1/en active Application Filing
- 2017-06-26 CN CN201780013528.4A patent/CN108780627B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204991104U (en) * | 2015-07-31 | 2016-01-20 | 深圳市小行星科技有限公司 | Vehicle mounted LCD display |
| JP2017041401A (en) * | 2015-08-21 | 2017-02-23 | 京セラドキュメントソリューションズ株式会社 | Electric apparatus |
| CN105161065A (en) * | 2015-09-30 | 2015-12-16 | 深圳市华星光电技术有限公司 | LCD signal control circuit, display panel and display device |
| CN105489171A (en) * | 2016-01-14 | 2016-04-13 | 青岛海信电器股份有限公司 | Liquid crystal display device and backlight control method thereof |
| WO2017152463A1 (en) * | 2016-03-08 | 2017-09-14 | 深圳市华星光电技术有限公司 | Backlight dimming circuit and liquid crystal display |
| CN105575342A (en) * | 2016-03-18 | 2016-05-11 | 青岛海信电器股份有限公司 | Backlight source brightness control method and device and liquid crystal display equipment |
| CN105632421A (en) * | 2016-03-18 | 2016-06-01 | 青岛海信电器股份有限公司 | Backlight brightness control method and device and liquid crystal display device |
| WO2018103357A1 (en) * | 2016-12-08 | 2018-06-14 | 青岛海信电器股份有限公司 | Method and device for generating backlight control signal in liquid crystal display device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112185310A (en) * | 2019-07-05 | 2021-01-05 | 精工爱普生株式会社 | Display driver, electro-optical device, electronic apparatus, and moving object |
| CN112185310B (en) * | 2019-07-05 | 2022-05-13 | 精工爱普生株式会社 | Display driver, electro-optical device, electronic apparatus, and moving object |
| CN111883071A (en) * | 2020-08-12 | 2020-11-03 | 深圳创维－Rgb电子有限公司 | Backlight compensation method and device, display equipment and readable storage medium |
| WO2022041073A1 (en) * | 2020-08-27 | 2022-03-03 | 南京英维尔科技服务有限公司 | Backlight device control method and apparatus for head-mounted device |
| WO2022041072A1 (en) * | 2020-08-27 | 2022-03-03 | 南京英维尔科技服务有限公司 | Backlight apparatus control circuit for head-mounted device |
| WO2022217698A1 (en) * | 2021-04-12 | 2022-10-20 | Tcl华星光电技术有限公司 | Display panel driving method and device, and display terminal |
| US12112686B2 (en) | 2021-04-12 | 2024-10-08 | Tcl China Star Optoelectronics Technology Co., Ltd. | Driving method, driving device, and display terminal of display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019000157A1 (en) | 2019-01-03 |
| CN108780627B (en) | 2020-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108780627A (en) | A kind of the backlight power control method and liquid crystal display of liquid crystal display | |
| KR100398011B1 (en) | Liquid crystal display device and driving method thereof | |
| CN102568411B (en) | Liquid crystal display and scanning backlight driving method thereof | |
| CN101399011B (en) | Video displaying apparatus | |
| KR100818013B1 (en) | Video display device and video display method | |
| KR100782240B1 (en) | A method for displaying an image | |
| CN102013232B (en) | Method of dimming a light source and display apparatus for performing the method | |
| CN102568410B (en) | Liquid crystal display and scanning backlight driving method thereof | |
| CN102097070B (en) | Liquid crystal display | |
| CN100392716C (en) | Liquid crystal display | |
| KR101350410B1 (en) | Circuit for Image compensation, LCD including the same and driving method thereof | |
| CN109036295A (en) | Image display processing method and device, display device and storage medium | |
| CN100570694C (en) | Display device and method | |
| CN108269548A (en) | Display device and method for controlling backlight thereof | |
| EP1701332A2 (en) | Backlit display device with reduced flickering and blur | |
| CN102237044B (en) | Light-emitting diode (LED) backlight driving method, drive device and drive circuit | |
| US10170059B2 (en) | Color sequential image method and system thereof | |
| CN101790270B (en) | LED backlight brightness dynamic control method and system adopting same | |
| KR20110132242A (en) | Stereoscopic display system | |
| KR20080033525A (en) | Liquid crystal display comprising a scanning backlight | |
| JP3816505B2 (en) | Video display device and video display method | |
| CN103810986B (en) | Drive method, light supply apparatus and the display device with the light supply apparatus of light source | |
| JP2005266751A (en) | Video display device | |
| CN105810156A (en) | Backlight adjustment method and circuit | |
| CN116047813B (en) | High-contrast display device and display system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |