CN105741765B - A kind of Poewr control method of display device, system and smart television - Google Patents
A kind of Poewr control method of display device, system and smart television Download PDFInfo
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- CN105741765B CN105741765B CN201610208611.4A CN201610208611A CN105741765B CN 105741765 B CN105741765 B CN 105741765B CN 201610208611 A CN201610208611 A CN 201610208611A CN 105741765 B CN105741765 B CN 105741765B
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Classifications
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The present invention provides a kind of Poewr control method of display device, system and smart televisions, are rgb image data by obtaining the image data received in display screen, and by the output of described image data；The rgb image data is synchronized as two parts；It will be in the storage to DDR memory of the first image data；By the second image data input gray level power look-up table memory, the permit notification of input previous frame image is obtained；The permit notification is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；The frame image data with input frame image synchronization sequential in frame power accumulator is read out of described DDR memory, and passes through multiplier and the correction factor is multiplied with the frame image data, is shown according to the image data driving display screen exported in multiplier.The method of the invention and system control the power of display device, while preventing display device high energy consumption from burning out, also save energy consumption.
Description
Technical field
The present invention relates to power control techniques field more particularly to a kind of Poewr control method of display device, it is
System and smart television.
Background technology
High dynamic range（HDR）Image can record the true brightness of each object in scene truly, can both record night
Late very dark details and brightness, can also record brightness very dazzling under sunlight, dynamic range can reach simultaneously
1010:1.But for existing custom liquid crystals TV maximum display brightness generally between 100 ~ 200cd/ ㎡, current standard provides liquid
The maximum brightness of brilliant TV be 100cd/ ㎡, contrast（That is dynamic range）It is 100:1.Unfortunately human eye can identify bright
Degree dynamic range is far longer than the dynamic range that custom liquid crystals TV can be shown.In order to true reappearance natural scene, people
Increase the LED backlight power of LCD TV and introduce local dimming technology to save energy consumption or using OLED display screen.
By taking OLED display screen as an example, the minimum display unit of OLED is equivalent to a LED, when have electric current by when will send out
Light, electric current is smaller, and the light emission luminance of LED is lower, conversely, electric current is bigger, the light emission luminance of LED is higher.The light emitting host of OLED
Millions of or even ten million LED is equivalent to, OLED power consumptions are related with the image content that it shows, when display picture entirety is partially dark
When, OLED power consumptions are smaller, and when showing that picture entirety is partially bright, OLED power consumptions are larger, when the picture of display " superbright is complete white ",
If not limiting LED unit electric current, OLED power consumptions are very big, even more than Switching Power Supply peak power output, and OLED screen fever is tight
Weight, it could even be possible to be burned out, so, OLED television internals must have power limit circuit.If OLED screen is used to show HDR
Image, the maximum current Imax of LED unit is big by the Imax than conventional OLED, and power limit circuit is even more important.
Invention content
In view of in OLED TVs power limit circuit importance, it is an object of the invention to provide a kind of display to the user
Poewr control method, system and the smart television of device overcome OLED TVs when showing high-power image data, due to the use of
Power is larger, leads to defect.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of Poewr control method of display device, wherein, include the following steps：
A, obtain the image data that receives of display screen, and by described image data by HDR decoders after, export RGB
Image data；
B, the rgb image data is synchronized as the first image data and the second image data；By described first image number
According to being input in DDR controller, by the DDR controller, store in DDR memory；Meanwhile by second picture number
It is point-by-point to obtain the previous frame image for being input to the gray scale power look-up table memory according to input gray level power look-up table memory
In each corresponding power consumption number of pixel；
C, by the power consumption number input frame power accumulator, the permit notification of the previous frame image is obtained；It will be described total
Power consumption number is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；
D, the frame picture number with input frame image synchronization sequential in frame power accumulator is read out of described DDR memory
According to, and pass through multiplier and the correction factor is multiplied with the frame image data, according to the image data exported in multiplier
Driving display screen is shown.
The Poewr control method of the display device, wherein, include before the step A：
A0, prestore rgb image data in gray scale power look-up table memory in advance in pixel it is corresponding with power
Gray scale power look-up table.
The Poewr control method of the display device, wherein, the step C is further included：
If permit notification is more than predetermined power threshold value, chooses pre-set value and subtract the result subtracted each other after a correction definite value
As correction factor；If permit notification is less than predetermined power threshold value, chooses after pre-set value corrects definite value plus one and be added
Result as correction factor；If permit notification is equal to predetermined power threshold value, predetermined definite value is chosen as correction factor.
The Poewr control method of the display device, wherein, it is further included in the A:
A1, image data that display screen receives is judged for HDR image data or rgb image data, if HDR image
The HDR image data is then reduced to rgb image data by data by HDR decoders, if rgb image data, then HDR
Decoder does not process, and directly exports.
A kind of power control system of display device, wherein, the system comprises：
Image data acquisition module for obtaining the image data that display screen receives, and described image data is passed through
After HDR decoders, rgb image data is exported；
Image data synchronization module, for synchronizing the rgb image data for the first image data and the second picture number
According to；Described first image data are input in DDR controller, by the DDR controller, are stored in DDR memory；Together
When, by the second image data input gray level power look-up table memory, point-by-point obtain is input to the gray scale power search
The corresponding power consumption number of each pixel in the previous frame image of table memory；
Correction factor chooses module, for by the power consumption number input frame power accumulator, obtaining the previous frame image
Permit notification；The permit notification is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；
Display module is controlled, for being read out of described DDR memory and input frame image synchronization in frame power accumulator
The frame image data of sequential, and pass through multiplier and the correction factor is multiplied with the frame image data, according in multiplier
The image data driving display screen of output is shown；
The power control system of the display device, wherein, the system also includes：
The pre- storing module of comparison data, for prestoring picture in rgb image data in gray scale power look-up table memory
Element and the corresponding gray scale power look-up table of power.
The power control system of the display device, wherein, the correction factor is chosen module and is further included：
Correction factor selecting unit, for when permit notification is more than predetermined power threshold value, choosing pre-set value and subtracting one
The result subtracted each other after correction definite value is as correction factor；When permit notification is less than predetermined power threshold value, pre-set value is chosen
In addition the result being added after a correction definite value is as correction factor；When permit notification is equal to predetermined power threshold value, choose pre-
Definite value is as correction factor.
The power control system of the display device, wherein, described image data acquisition module includes：
Date Conversion Unit, for judging the image data received in display screen for HDR image data or RGB image
The HDR image data if HDR image data, is then reduced to rgb image data by data by HDR decoders, if
Rgb image data, then HDR decoders do not process, directly export.
A kind of smart television, wherein, including：Power control system as mentioned.
Advantageous effect, the present invention provides a kind of Poewr control method of display device, system and smart televisions, obtain aobvious
The image data received in display screen, and by described image data by HDR decoders after, export as rgb image data；By institute
Rgb image data is stated to synchronize as two parts；First image data and the second image data；Described first image data are input to
In DDR controller, by the DDR controller, store in DDR memory；Meanwhile second image data is inputted into ash
Power look-up table memory is spent, point-by-point obtain is input to each picture in the previous frame image of the gray scale power look-up table memory
The corresponding power consumption number of element；By the power consumption number input frame power accumulator, the permit notification of the previous frame image is obtained；By institute
Permit notification is stated compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；From the DDR memory
It is interior reading with frame power accumulator in input frame image synchronization sequential frame image data, and pass through multiplier by the correction because
It is sub to be multiplied with the frame image data, it is shown according to the image data driving display screen exported in multiplier.Side of the present invention
Method and system control effectively to the power of display device, are obtained simultaneously improving display terminal security performance, have saved energy consumption.
Description of the drawings
Fig. 1 is the step flow chart of the Poewr control method of display device of the present invention.
Fig. 2 is the schematic diagram of the Poewr control method specific embodiment of display device of the present invention.
Fig. 3 be display device of the present invention Poewr control method in control strategy schematic diagram.
Fig. 4 is the theory structure schematic diagram of the power control system of display device provided by the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and do not have to
It is of the invention in limiting.
In order to increase the presentation to natural scene, OLED display screen needs to increase the power of display unit, and power is more than
Certain threshold value may result in display screen damage, it is therefore desirable to the power of display screen be controlled, and invention is by obtaining image
The gray value of pixel in data, and lookup and the corresponding power of gray value, and according to the performance number found out to display screen
Power carries out corresponding adjusting control, so as to ensure that display screen power control in certain range.
The invention discloses a kind of Poewr control method of display device, as shown in Figure 1, the method includes following steps
Suddenly：
S1, obtain the image data that receives of display screen, and by described image data by HDR decoders after, export RGB
Image data.
It obtains the image data received in current display screen, and by described image data transmission to HDR decoders, uses institute
It states HDR decoders and converts it into rgb image data.If due to showing HDR image data on a display screen, since it can be with
More dynamic ranges and image detail are improved, then when being shown to it, then display screen needs bigger power, therefore
It is converted into rgb image data first in this step, is saving display screen energy consumption volume simultaneously,
In S1 steps, further include：
The image data received in display screen is judged for HDR image data or rgb image data, if HDR image
The HDR image data is then reduced to rgb image data by data by HDR decoders, if rgb image data, then HDR
Decoder does not process, and directly exports.
S2, the rgb image data is synchronized as the first image data and the second image data；By described first image number
According to being input in DDR controller, by the DDR controller, store in DDR memory；Meanwhile by second picture number
It is point-by-point to obtain the previous frame image for being input to the gray scale power look-up table memory according to input gray level power look-up table memory
In each corresponding power consumption number of pixel.
S3, by the power consumption number input frame power accumulator, obtain the permit notification of the previous frame image；It will be described total
Power consumption number is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result.
The step S3 is further included：
If permit notification is more than predetermined power threshold value, chooses pre-set value and subtract the result subtracted each other after a correction definite value
As correction factor；If permit notification is less than predetermined power threshold value, chooses after pre-set value corrects definite value plus one and be added
Result as correction factor；If permit notification is equal to predetermined power threshold value, predetermined definite value is chosen as correction factor.
The correction factor come out according to power limit policy calculation feeds back to power limit policy module as next time
The initial calibration factor.
It is smaller to correct definite value, correction is finer, and brightness flicker sense is weaker, and correction time is longer；Conversely, correction definite value is got over
Greatly, correction is more coarse, and brightness flicker sense is stronger, and correction time is shorter.
S4, reading and the frame picture number of input frame image synchronization sequential in frame power accumulator out of described DDR memory
According to, and pass through multiplier and the correction factor is multiplied with the frame image data, according to the image data exported in multiplier
Driving display screen is shown.
The step S4 is further included：
Image data is read out of DDR memory and just postpones a frame, correction factor C and the image data time of multiplier
On be only it is corresponding.
In order to realize the power corresponding to quickly finding out pixel according to image data, further included before the step S1：
Pixel in rgb image data is prestored in gray scale power look-up table memory in advance to look into the corresponding gray scale power of power
Look for table.
In order to which the above method is further described in more detail, Fig. 2, Fig. 3 give method provided by the invention specific
Using when schematic diagram.
User connects the power supply of OLED display screen, the LED of entire screen electric current by when shine, light-emitting LED set
Constitute the image of display screen;The set of the gray scale of these pixels constitutes the image data in display screen；Pass through picture number
The image data of display screen is obtained according to acquisition module.
After image data is obtained, the RGB image that is made up of image data decoding into three primary color components HDR decoders
Data;If the image data that acquisition module obtains for HDR image data, by HDR decoders by the HDR image data also
Originally it was rgb image data, if the graph data that acquisition module obtains is rgb image data, HDR decoders do not process, directly
Output is connect as original rgb image data.
It is same to gray scale power look-up table memory and DDR controller respectively after graph data is decoded as rgb image data
Step sends the rgb image data after same frame image decoding;The frame image data being sent in DDR controller（First image
Data）It is saved in DDR memory;It is sent to a frame image data of gray scale power look-up table（Second image data）It carries out
The lookup of power;Each gray value of image data is corresponding with the driving current of LED unit, i.e., each gray value and LED
The power attenuation of unit is also one-to-one；Each gray value corresponds to a power in gray scale power look-up table memory
Value, one by one compares each gray value of the image data of input, then can export the performance number of correspondence image data.
After the performance number that the second image data is exported by gray scale power look-up table memory, pass through frame power accumulator
The performance number of this image data is added up to obtain total performance number PF。
After ingoing power restriction strategy module, according to the performance number P calculatedFWith the power threshold P of settingthComparison
As a result correction factor C is corrected；Automatically the power threshold P of last power down user setting is read after being powered on display screenth, correction
Factor C and amendment definite value X, user can also change power threshold P at any timeth, correction factor C and correct definite value X.
The strategy that power limit corrects correction factor C is as follows：Work as PF>PthWhen, C=C-X;Work as PF<PthWhen, C=C+X;When
PF=PthWhen, C=C;(the range 0.05~0.2 of X）;X is smaller, and correction is finer, and brightness flicker sense is weaker, and correction time is longer；X
Bigger, correction is more coarse, and brightness flicker sense is stronger, and correction time is shorter.
The first image data in DDR memory is restored by multiplier on the basis of power limit；By work(
Rate restriction strategy judges one correction factor C of output, and correction factor C is a multiplier of multiplier, is read from DDR memory
Raw image data is the multiplicand of multiplier.Due to frame power accumulator be calculate a frame in each pixel power attenuation it
With, thus calculate the time be to delay a frame, from DDR memory read image data also just to postpone a frame, multiply in this way
The correction factor C and image data of musical instruments used in a Buddhist or Taoist mass are corresponding.
Display is driven display screen according to the image data exported from multiplier.
Based on the above method, the invention also discloses a kind of power control system of display device, such as Fig. 4 institutes
Show, the system comprises：
Image data acquisition module 110, for obtaining the image data received in display screen, and by described image data
After HDR decoders, export as rgb image data；Its function is as described in step S1.
Image data synchronization module 120, for synchronizing the rgb image data for two parts；First image data and
Second image data；Described first image data are input in DDR controller, pass through the DDR controller, storage to DDR
In memory；Meanwhile by the second image data input gray level power look-up table memory, point-by-point obtain is input to the ash
Spend the corresponding power consumption number of each pixel in the previous frame image of power look-up table memory；Its function is as described in step S2.
Correction factor chooses module 130, for by the power consumption number input frame power accumulator, obtaining the former frame figure
The permit notification of picture；The permit notification is compared with predetermined power threshold value, selection with the corresponding correction of comparison result because
Son；Its function is as described in step S3.
Display module 140 is controlled, it is same with input frame image in frame power accumulator for being read out of described DDR memory
The frame image data of sequential is walked, and passes through multiplier and the correction factor is multiplied with the frame image data, according to multiplier
The image data driving display screen of middle output is shown；Its function is as described in step S4.
The system also includes：
The pre- storing module of comparison data, for prestoring picture in rgb image data in gray scale power look-up table memory
Element and the corresponding gray scale power look-up table of power.
The correction factor is chosen module and is further included：
Correction factor selecting unit, for when permit notification is more than predetermined power threshold value, choosing pre-set value and subtracting one
The result subtracted each other after correction definite value is as correction factor；When permit notification is less than predetermined power threshold value, pre-set value is chosen
In addition the result being added after a correction definite value is as correction factor；When permit notification is equal to predetermined power threshold value, choose pre-
Definite value is as correction factor.
The power control system of the display device, wherein, described image data acquisition module includes：
Date Conversion Unit, for judging the image data received in display screen for HDR image data or RGB image
The HDR image data if HDR image data, is then reduced to rgb image data by data by HDR decoders, if
Rgb image data, then HDR decoders do not process, directly export.
On the basis of above system, the invention also discloses a kind of smart television, the smart television includes：Described
Power control system.The smart television passes through display of the power control system to the image data received in display screen
Power is controlled,
Advantageous effect, the present invention provides a kind of Poewr control method of display device, system and smart televisions, obtain aobvious
The image data received in display screen, and by described image data by HDR decoders after, export as rgb image data；By institute
Rgb image data is stated to synchronize as two parts；First image data and the second image data；Described first image data are input to
In DDR controller, by the DDR controller, store in DDR memory；Meanwhile second image data is inputted into ash
Power look-up table memory is spent, point-by-point obtain is input to each picture in the previous frame image of the gray scale power look-up table memory
The corresponding power consumption number of element；By the power consumption number input frame power accumulator, the permit notification of the previous frame image is obtained；By institute
Permit notification is stated compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；From the DDR memory
It is interior reading with frame power accumulator in input frame image synchronization sequential frame image data, and pass through multiplier by the correction because
It is sub to be multiplied with the frame image data, it is shown according to the image data driving display screen exported in multiplier.Side of the present invention
Method and system control effectively to the power of display device, are obtained simultaneously improving display terminal security performance, have saved energy consumption.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect range.
Claims (7)
1. a kind of Poewr control method of display device, which is characterized in that include the following steps：
A, the image data that receives of display screen is obtained, and after described image data are decoded by HDR, exports RGB image number
According to；
B, the rgb image data is synchronized as the first image data and the second image data；Described first image data are defeated
Enter into DDR controller, by the DDR controller, store in DDR memory；It is meanwhile second image data is defeated
Enter gray scale power look-up table memory, point-by-point obtain is input in the previous frame image of the gray scale power look-up table memory often
The corresponding power consumption number of a pixel；
C, by the power consumption number input frame power accumulator, the permit notification of the previous frame image is obtained；By the total power consumption
Value is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；
D, the frame image data with input frame image synchronization sequential in frame power accumulator is read out of described DDR memory, and
The correction factor with the frame image data is multiplied by multiplier, is driven according to the image data exported in multiplier aobvious
Display screen is shown；
The step C is further included：
If permit notification is more than predetermined power threshold value, chooses pre-set value and subtract the result conduct subtracted each other after a correction definite value
Correction factor；If permit notification is less than predetermined power threshold value, pre-set value is chosen plus the knot being added after a correction definite value
Fruit is as correction factor；If permit notification is equal to predetermined power threshold value, predetermined definite value is chosen as correction factor；
It is smaller to correct definite value, correction is finer, and brightness flicker sense is weaker, and correction time is longer；Conversely, correction definite value is bigger, school
Just more coarse, brightness flicker sense is stronger, and correction time is shorter.
2. the Poewr control method of display device according to claim 1, which is characterized in that include before the step A：
A0, pixel and the corresponding ash of power in rgb image data are prestored in gray scale power look-up table memory in advance
Spend power look-up table.
3. the Poewr control method of display device according to claim 1, which is characterized in that further included in the A:
A1, the image data received in display screen is judged for HDR image data or rgb image data, if HDR image number
According to the HDR image data then being reduced to rgb image data by HDR decoders, if rgb image data, then HDR is solved
Code device does not process, and directly exports.
4. a kind of power control system of display device, which is characterized in that the system comprises：
Image data acquisition module obtains the image data that display screen receives, and described image data is passed through HDR decoders
Afterwards, rgb image data is exported；
Image data synchronization module, for synchronizing the rgb image data for the first image data and the second image data；It will
Described first image data are input in DDR controller, by the DDR controller, are stored in DDR memory；It meanwhile will
The second image data input gray level power look-up table memory, point-by-point obtain are input to the gray scale power look-up table storage
The corresponding power consumption number of each pixel in the previous frame image of device；
Correction factor chooses module, for by the power consumption number input frame power accumulator, obtaining the total of the previous frame image
Power consumption number；The permit notification is compared with predetermined power threshold value, selection and the corresponding correction factor of comparison result；
Display module is controlled, for being read out of described DDR memory and input frame image synchronization sequential in frame power accumulator
Frame image data, and pass through multiplier and the correction factor be multiplied with the frame image data, exported according in multiplier
Image data driving display screen show；
The correction factor is chosen module and is further included：
Correction factor selecting unit, for when permit notification is more than predetermined power threshold value, choosing pre-set value and subtracting a correction
The result subtracted each other after definite value is as correction factor；When permit notification is less than predetermined power threshold value, chooses pre-set value and add
The result being added after one correction definite value is as correction factor；When permit notification is equal to predetermined power threshold value, it is predetermined fixed to choose
Value is as correction factor；
It is smaller to correct definite value, correction is finer, and brightness flicker sense is weaker, and correction time is longer；Conversely, correction definite value is bigger, school
Just more coarse, brightness flicker sense is stronger, and correction time is shorter.
5. the power control system of display device according to claim 4, which is characterized in that the system also includes：
The pre- storing module of comparison data, for prestored in gray scale power look-up table memory in rgb image data pixel with
The corresponding gray scale power look-up table of power.
6. the power control system of display device according to claim 4, which is characterized in that described image data acquisition module
Including：
Date Conversion Unit, for judging the image data received in display screen for HDR image data or RGB image number
According to if HDR image data, then the HDR image data being reduced to rgb image data by HDR decoders, if RGB
Image data, then HDR decoders do not process, directly export.
7. a kind of smart television, which is characterized in that including：Such as claim 4-6 any one of them power control systems.
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| CN108766364B (en) | 2018-05-18 | 2020-07-07 | 京东方科技集团股份有限公司 | Image display processing method and device, display device and storage medium |
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