CN108766367A - Backlight brightness control method, television terminal and computer readable storage medium - Google Patents
Backlight brightness control method, television terminal and computer readable storage medium Download PDFInfo
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- CN108766367A CN108766367A CN201810528389.5A CN201810528389A CN108766367A CN 108766367 A CN108766367 A CN 108766367A CN 201810528389 A CN201810528389 A CN 201810528389A CN 108766367 A CN108766367 A CN 108766367A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- General Physics & Mathematics (AREA)
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention discloses a kind of backlight brightness control method, television terminal and computer readable storage medium, which includes：When receiving image to be displayed data, according to the image to be displayed data, the initial backlight brightness value of each LED backlight subregion is determined, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；Corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain the practical backlight brightness values of each LED backlight subregion；According to the practical backlight brightness values of luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight subregion, the backlight illumination of each LED backlight subregion is adjusted.The present invention can improve the accuracy of backlight illumination, and improve the backlight illumination uniformity of each LED backlight subregion, promote image display effect.
Description
Technical field
The present invention relates to a kind of LCD TV field more particularly to backlight brightness control method, television terminal and computers
Readable storage medium storing program for executing.
Background technology
With the fast development of LCD technology, the resolution ratio of liquid crystal display is also higher and higher, can support
Image enhancement technique is also more and more, and the size of liquid crystal display is also increasing.In the prior art, LED (Light
Emitting Diode, light emitting diode) it is widely used in large-sized liquid crystal display as backlight.Backlight control
When circuit drives circuit drives backlight, the LED for controlling multiple backlight subareas simultaneously is needed, electric current is adjusted by driving circuit
Size controls the electric current of the LED of each backlight subarea, to control the backlight illumination of backlight subarea.
Currently, the brightness of each LED of composition backlight subarea can be adjusted according to the light and shade of image, that is, the high bright part of image is turned up
The backlight illumination of corresponding LED, while the backlight illumination that image darkness part corresponds to LED is reduced, to reach best contrast, by
To the influence of light reflection and boundary effect, being had differences between the backlight illumination and actual value after adjusting, accuracy is not high, this
Outside, since LED has discreteness, and the problem of display screen glass substrate uniformity, the brightness that the LED of different subregions is sent out is endless
It is exactly the same, cause the backlight illumination of each LED backlight subregion uneven, influences image display effect.
Therefore, the accuracy of backlight illumination how is improved, and improves the backlight illumination uniformity of each LED backlight subregion,
It is current urgent problem to be solved to promote image display effect.
Invention content
The main purpose of the present invention is to provide a kind of backlight brightness control method, television terminal and computer-readable storages
Medium, it is intended to how to improve the accuracy of backlight illumination, and improve the backlight illumination uniformity of each LED backlight subregion, be promoted
Image display effect.
To achieve the above object, the present invention provides a kind of backlight brightness control method, the backlight brightness control method packet
Include following steps：
When receiving image to be displayed data, according to the image to be displayed data, the original of each LED backlight subregion is determined
Beginning backlight brightness values, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
Corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain each LED backlight point
The practical backlight brightness values in area；
According to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight point
The practical backlight brightness values in area adjust the backlight illumination of each LED backlight subregion.
Optionally, basis luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and
The practical backlight brightness values of each LED backlight subregion, the backlight illumination step for adjusting each LED backlight subregion include：
The mapping table between the practical backlight brightness values to prestore and luminance compensation coefficient is inquired, determines each LED backlight
The corresponding luminance compensation coefficient of practical backlight brightness values of subregion；
It is multiplied by corresponding luminance compensation coefficient with the practical backlight brightness values of each LED backlight subregion, to obtain each LED backlight
The brightness offset value of subregion；
With the practical backlight brightness values of each LED backlight subregion, in addition the corresponding brightness offset of each LED backlight subregion, with
Obtain the final backlight brightness values of each LED backlight subregion；
According to the final backlight brightness values of each LED backlight subregion, the backlight illumination of each LED backlight subregion is adjusted.
Optionally, basis luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and
The practical backlight brightness values of each LED backlight subregion further include after the step of adjusting the backlight illumination of each LED backlight subregion：
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjusting higher than pre-
If when electric current, the driving current of an at least LED backlight subregion described in determination is higher than the accumulative duration of predetermined current；
If the accumulative duration reaches predetermined threshold value, the driving current of an at least LED backlight subregion is dropped
Low is default safe current, and continues preset duration.
Optionally it is determined that the driving current of an at least LED backlight subregion is higher than the accumulative duration of predetermined current
The step of include：
If detecting the driving current that there is an at least LED backlight subregion in each LED backlight subregion after adjusting higher than pre-
If electric current, then the driving current of an at least LED backlight subregion described in record is higher than the first continuous duration of predetermined current；
When detecting that the driving current of an at least LED backlight subregion becomes less than or by being higher than predetermined current equal to pre-
If when electric current, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current continuously continues
Duration determines the back-off duration of the described first continuous duration；
The difference of described first continuous duration and the back-off duration is determined as to the driving of an at least LED backlight subregion
Electric current is higher than the accumulative duration of predetermined current.
Optionally, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current connects
The step of continuous duration, the back-off duration for determining the described first continuous duration includes：
The mapping table inquired continuous duration and be buckled between coefficient determines that involving meter with described second continues duration
Corresponding back-off coefficient；
The back-off coefficient is multiplied with the described second continuous duration, with the described first continuous duration of determination
It is buckled to duration.
Optionally, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current connects
The step of continuous duration, the back-off duration for determining the described first continuous duration further includes：
Obtain default back-off coefficient；
The default back-off coefficient is multiplied with the described second continuous duration, when continuously being continued with determination described first
Long back-off duration.
Optionally, basis luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and
The practical backlight brightness values of each LED backlight subregion further include after the step of adjusting the backlight illumination of each LED backlight subregion：
The power of each LED backlight subregion is calculated, and the power consumption of each LED backlight subregion is added, to obtain LED general powers；
Determine the LED general powers whether higher than default power；
If the LED general powers are higher than default power, the current backlight brightness of each LED backlight subregion is reduced.
Optionally, the step of current backlight brightness for reducing each LED backlight subregion includes：
The mapping table for inquiring the LED general powers and backlight illumination decreasing value that prestore determines that the LED general powers correspond to
Backlight illumination decreasing value, and according to the backlight illumination decreasing value, reduce the current backlight brightness of each LED backlight subregion.
In addition, to achieve the above object, the present invention also provides a kind of television terminal, the television terminal includes：Memory,
The backlight illumination control program that processor and being stored in can be run on the memory and on the processor, the backlight are bright
The step of degree control program realizes backlight brightness control method as described above when being executed by the processor.
In addition, to achieve the above object, it is described computer-readable the present invention also provides a kind of computer readable storage medium
Backlight illumination control program is stored on storage medium, the backlight illumination control program realizes institute as above when being executed by processor
The step of backlight brightness control method stated.
The present invention proposes a kind of backlight brightness control method, television terminal and computer readable storage medium, by working as
When receiving image to be displayed data, the image to be displayed data are based on, determine the initial backlight brightness of each LED backlight subregion
Value, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion, then with each LED backlight subregion
Initial backlight brightness value subtract corresponding brightness influence value, to reduce the initial backlight brightness of each LED backlight subregion with it is true
Difference between real backlight illumination improves the accuracy of backlight illumination, meanwhile, according to the practical backlight with each LED backlight subregion
The practical backlight brightness values of the corresponding luminance compensation coefficient of brightness value and each LED backlight subregion, adjust each LED backlight subregion
Backlight illumination improves the backlight illumination uniformity of each LED backlight subregion, improves image display effect.
Description of the drawings
Fig. 1 is the television terminal structural schematic diagram for the hardware running environment that the embodiment of the present invention is related to；
Fig. 2 is the flow diagram of backlight brightness control method first embodiment of the present invention；
Fig. 3 is the refinement flow diagram of step S103 in first embodiment of the invention；
Fig. 4 is the flow diagram of backlight brightness control method second embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to Fig.1, Fig. 1 is the television terminal structural schematic diagram for the hardware running environment that the embodiment of the present invention is related to.
As shown in Figure 1, the television terminal may include：Processor 1001, such as CPU, communication bus 1002, user interface
1003, network interface 1004, memory 1005.Wherein, communication bus 1002 is for realizing the connection communication between these components.
User interface 1003 may include display screen (Display), input unit such as keyboard (Keyboard), optional user interface
1003 can also include standard wireline interface and wireless interface.Network interface 1004 may include optionally that the wired of standard connects
Mouth, wireless interface (such as WI-FI interfaces).Memory 1005 can be high-speed RAM memory, can also be stable memory
(non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of aforementioned processor
1001 storage device.
Optionally, television terminal can also include camera, RF (Radio Frequency, radio frequency) circuit, sensor,
Voicefrequency circuit, WiFi module etc..
It will be understood by those skilled in the art that television terminal structure shown in Fig. 1 does not constitute the limit to television terminal
It is fixed, may include either combining certain components or different components arrangement than illustrating more or fewer components.
As shown in Figure 1, as may include that operating system, network are logical in a kind of memory 1005 of computer storage media
Believe that module, Subscriber Interface Module SIM and backlight illumination control program.
In television terminal shown in Fig. 1, processor 1001 can be used for calling the backlight stored in memory 1005 bright
Degree control program, and execute following steps：
When receiving image to be displayed data, according to the image to be displayed data, the original of each LED backlight subregion is determined
Beginning backlight brightness values, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
Corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain each LED backlight point
The practical backlight brightness values in area；
According to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight point
The practical backlight brightness values in area adjust the backlight illumination of each LED backlight subregion.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
The mapping table between the practical backlight brightness values to prestore and luminance compensation coefficient is inquired, determines each LED backlight
The corresponding luminance compensation coefficient of practical backlight brightness values of subregion；
It is multiplied by corresponding luminance compensation coefficient with the practical backlight brightness values of each LED backlight subregion, to obtain each LED backlight
The brightness offset value of subregion；
With the practical backlight brightness values of each LED backlight subregion, in addition the corresponding brightness offset of each LED backlight subregion, with
Obtain the final backlight brightness values of each LED backlight subregion；
According to the final backlight brightness values of each LED backlight subregion, the backlight illumination of each LED backlight subregion is adjusted.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjusting higher than pre-
If when electric current, the driving current of an at least LED backlight subregion described in determination is higher than the accumulative duration of predetermined current；
If the accumulative duration reaches predetermined threshold value, the driving current of an at least LED backlight subregion is dropped
Low is default safe current, and continues preset duration.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
If detecting the driving current that there is an at least LED backlight subregion in each LED backlight subregion after adjusting higher than pre-
If electric current, then the driving current of an at least LED backlight subregion described in record is higher than the first continuous duration of predetermined current；
When detecting that the driving current of an at least LED backlight subregion becomes less than or by being higher than predetermined current equal to pre-
If when electric current, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current continuously continues
Duration determines the back-off duration of the described first continuous duration；
The difference of described first continuous duration and the back-off duration is determined as to the driving of an at least LED backlight subregion
Electric current is higher than the accumulative duration of predetermined current.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
The mapping table inquired continuous duration and be buckled between coefficient determines that involving meter with described second continues duration
Corresponding back-off coefficient；
The back-off coefficient is multiplied with the described second continuous duration, with the described first continuous duration of determination
It is buckled to duration.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
Obtain default back-off coefficient；
The default back-off coefficient is multiplied with the described second continuous duration, when continuously being continued with determination described first
Long back-off duration.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
The power of each LED backlight subregion is calculated, and the power consumption of each LED backlight subregion is added, to obtain LED general powers；
Determine the LED general powers whether higher than default power；
If the LED general powers are higher than default power, the current backlight brightness of each LED backlight subregion is reduced.
Further, processor 1001 can be used for calling the backlight illumination control program stored in memory 1005, and
Execute following steps：
The mapping table for inquiring the LED general powers and backlight illumination decreasing value that prestore determines that the LED general powers correspond to
Backlight illumination decreasing value, and according to the backlight illumination decreasing value, reduce the current backlight brightness of each LED backlight subregion.
The basic phase of each specific embodiment of the specific embodiment of television terminal of the present invention and following backlight brightness control methods
Together, therefore not to repeat here.
It is the flow diagram of backlight brightness control method first embodiment of the present invention with reference to Fig. 2, Fig. 2.
The backlight brightness control method is applied to television terminal, is chosen as television terminal shown in FIG. 1, the backlight illumination control
Method processed includes the following steps：
Step S101, according to image to be displayed data, determines each LED backlight point when receiving image to be displayed data
The initial backlight brightness value in area, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
Step S102 subtracts corresponding brightness influence value with the initial backlight brightness value of each LED backlight subregion, each to obtain
The practical backlight brightness values of LED backlight subregion；
Step S103, according to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and respectively
The practical backlight brightness values of LED backlight subregion adjust the backlight illumination of each LED backlight subregion.
Forming the brightness of each LED of backlight subarea can be adjusted according to the light and shade of image, that is, the high bright part of image is turned up and corresponds to
The backlight illumination of LED, while the backlight illumination that image darkness part corresponds to LED is reduced, to reach best contrast, by light
Reflection and the influence of boundary effect, have differences between the backlight illumination and actual value after adjusting, and accuracy is not high, in addition,
Since LED has discreteness, and the problem of display screen glass substrate uniformity, the brightness that the LED of different subregions is sent out is incomplete
It is identical, cause the backlight illumination of each LED backlight subregion uneven, influences image display effect.To solve the above problems, this implementation
Example proposes a kind of backlight brightness control method, and each step of backlight brightness control method is described in detail below：
Step S101, according to image to be displayed data, determines each LED backlight point when receiving image to be displayed data
The initial backlight brightness value in area, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
In the present embodiment, television terminal includes liquid crystal display, and the liquid crystal display uses LED as backlight, together
When liquid crystal display include multiple LED backlight subregions, and each LED backlight subregion includes at least a LED.It waits showing when receiving
When showing image data, according to image to be displayed data, determines the initial backlight brightness value of each LED backlight subregion, that is, count and wait showing
The backlight illumination for showing each LED backlight subregion in image data obtains the brightness histogram of each LED backlight subregion, and by the brightness
Histogram determines the initial backlight brightness value of each LED backlight subregion；Then determine each LED backlight subregion by remaining each LED backlight
The brightness influence value that subregion influences, that is, obtain several association LED backlight subregions of each LED backlight subregion, and obtain several associations
The initial backlight brightness value of LED backlight subregion is each associated in LED backlight subregion, then according to several association LED backlight subregions
In be each associated with the initial backlight brightness value of LED backlight subregion, calculate the average backlight brightness values of association LED backlight subregion, and
The mapping table between the average backlight brightness values to prestore and brightness influence value is inquired, the flat of association LED backlight subregion is obtained
The equal corresponding brightness influence value of backlight brightness values, and the brightness that the brightness influence value is determined as to corresponding LED backlight subregion influences
Value.
By taking single led backlight subarea as an example, the specific acquisition modes of association LED backlight subregion are selection one LED backlight point
Area, and the zonal coding of the LED backlight subregion is obtained, remaining subregion that then obtain has incidence relation with the zonal coding is compiled
Code, and obtains the corresponding LED backlight subregion of remaining zonal coding, i.e. the association LED backlight subregion of the LED backlight subregion.It needs
Illustrate, the incidence relation between zonal coding is configured by those skilled in the art based on actual conditions, average backlight
Mapping table between brightness value and brightness influence value is obtained by those skilled in the art by test of many times.
In specific implementation, the association LED backlight subregion of different ladders can be set according to distance, to based on different ladders
Association LED backlight subregion determines brightness influence value, improves the accuracy of brightness influence value, it should be noted that association LED backlight
The step number of subregion can be configured by actual conditions, be said for the association LED backlight subregion of two ladders is arranged
Bright, association LED backlight subregion and associated LED backlight subregion positioned at the first ladder contact with each other, and are located at the second ladder
Association LED backlight subregion and associated LED backlight subregion between be spaced a LED backlight subregion.
By taking single led backlight subarea as an example, if the specific method of determination of brightness influence value is to obtain a LED backlight subregion
Dry first association LED backlight subregion (being located at the first ladder) and several second association LED backlight subregions (being located at the second ladder),
And the initial backlight brightness value of each first association LED backlight subregion in several first association LED backlight subregions is obtained, and obtain
The initial backlight brightness value of each second association LED backlight subregion in several second association LED backlight subregions is taken, if then basis
The initial backlight brightness value of each first association LED backlight subregion, calculates the first association in dry first association LED backlight subregion
The average backlight brightness values of the first of LED backlight subregion, and it is associated with each second association in LED backlight subregion according to several second
The initial backlight brightness value of LED backlight subregion calculates the second average backlight brightness values of the second association LED backlight subregion, finally
The mapping table between the average backlight brightness values to prestore and brightness influence value is inquired, the first average backlight brightness values pair are obtained
The the first brightness influence value answered, and obtain the second average corresponding first brightness influence value of backlight brightness values is used in combination first bright
Degree influence value is multiplied by the first default weight coefficient, to obtain the first weight brightness influence value, and is multiplied with the second brightness influence value
It is to obtain the second weight brightness influence value, the first weight brightness influence value and the second weight is bright with the second default weight coefficient
The sum of degree influence value is determined as the brightness influence value of corresponding LED backlight subregion.It should be noted that above-mentioned average backlight brightness values
Mapping table between brightness influence value is obtained by those skilled in the art based on test of many times, and the first default weight system
Number and the second default weight coefficient can be configured by those skilled in the art based on actual conditions, and the present embodiment does not make this to have
Body limits.
Step S102 subtracts corresponding brightness influence value with the initial backlight brightness value of each LED backlight subregion, each to obtain
The practical backlight brightness values of LED backlight subregion；
In the present embodiment, television terminal is in the brightness shadow for determining that each LED backlight subregion is influenced by remaining each LED backlight subregion
After ringing value, corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain each LED backlight
The practical backlight brightness values of subregion.
Step S103, according to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and respectively
The practical backlight brightness values of LED backlight subregion adjust the backlight illumination of each LED backlight subregion.
In the present embodiment, television terminal after the practical backlight brightness values for getting each LED backlight subregion, according to it is each
The corresponding luminance compensation coefficient of practical backlight brightness values of LED backlight subregion and the practical backlight illumination of each LED backlight subregion
Value, adjusts the backlight illumination of each LED backlight subregion.
Specifically, include with reference to Fig. 3, step S103：
Step S1031 inquires the mapping table between the practical backlight brightness values to prestore and luminance compensation coefficient, determines
The corresponding luminance compensation coefficient of practical backlight brightness values of each LED backlight subregion；
In the present embodiment, the mapping that television terminal is inquired between the practical backlight brightness values to prestore and luminance compensation coefficient is closed
It is table, determines the corresponding luminance compensation coefficient of the practical backlight brightness values of each LED backlight subregion, it should be noted that above-mentioned original
Mapping table between beginning backlight illumination and luminance compensation coefficient can be obtained by those skilled in the art by test of many times.Tool
Body test method be when often receiving an image to be displayed data, from image to be displayed data obtain maximum brightness number
According to, and each LED backlight subregion is lighted with maximum luminance data, then acquires the present intensity value of each LED backlight subregion, and according to
The present intensity value of each LED backlight subregion calculates average brightness value, subsequently calculate the present intensity value of each LED backlight subregion with
Luminance difference between average brightness value, and the corresponding brightness difference for calculating each LED backlight subregion accounts for the ratio of present intensity value,
That is luminance difference ratio, and be the present intensity value of each LED backlight subregion by the luminance difference ratio-dependent of each LED backlight subregion
Luminance compensation coefficient, by test of many times, obtain each LED backlight subregion brightness value and for luminance compensation coefficient,
To establish the mapping table between initial backlight brightness and luminance compensation coefficient, wherein present intensity value is bright higher than average
The luminance compensation coefficient of the LED backlight subregion of angle value is that just, present intensity value is bright less than the LED backlight subregion of average brightness value
Degree penalty coefficient is negative, and the luminance compensation coefficient that present intensity value is equal to the LED backlight subregion of average brightness value is zero.
Step S1032 is multiplied by corresponding luminance compensation coefficient, to obtain with the practical backlight brightness values of each LED backlight subregion
Take the brightness offset value of each LED backlight subregion；
Step S1033, with the practical backlight brightness values of each LED backlight subregion, in addition the corresponding brightness of each LED backlight subregion
Offset, to obtain the final backlight brightness values of each LED backlight subregion；
Step S1034, according to the final backlight brightness values of each LED backlight subregion, the backlight for adjusting each LED backlight subregion is bright
Degree.
In the present embodiment, television terminal is multiplied by corresponding luminance compensation with the practical backlight brightness values of each LED backlight subregion
The practical backlight brightness values of each LED backlight subregion are used in combination to obtain the brightness offset value of each LED backlight subregion in coefficient, in addition each
The corresponding brightness offset of LED backlight subregion, to obtain the final backlight brightness values of each LED backlight subregion, then according to each LED
The final backlight brightness values of backlight subarea adjust the backlight illumination of each LED backlight subregion.
In the present embodiment, the present invention is by when receiving image to be displayed data, being based on the image to be displayed data, really
The initial backlight brightness value of fixed each LED backlight subregion, and determine what each LED backlight subregion was influenced by remaining each LED backlight subregion
Then brightness influence value subtracts corresponding brightness influence value with the initial backlight brightness value of each LED backlight subregion, each to reduce
Difference between the initial backlight brightness and true backlight brightness of LED backlight subregion, improves the accuracy of backlight illumination, meanwhile,
According to the reality of luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight subregion
Backlight brightness values adjust the backlight illumination of each LED backlight subregion, improve the backlight illumination uniformity of each LED backlight subregion, improve
Image display effect.
Further, with reference to Fig. 4, it is based on aforementioned first embodiment, it is proposed that the of backlight brightness control method of the present invention
Two embodiments, difference lies in after step S103, which further includes with previous embodiment：
Step S104, when detect adjust after each LED backlight subregion in exist an at least LED backlight subregion driving electricity
When stream is higher than predetermined current, determine that the driving current of an at least LED backlight subregion is higher than the accumulative duration of predetermined current；
In the present embodiment, television terminal is each after detection adjustment after the backlight illumination for adjusting each LED backlight subregion
Whether the driving current of LED backlight subregion is higher than predetermined current, exists at least when detecting in each LED backlight subregion after adjusting
When the driving current of one LED backlight subregion is higher than predetermined current, determine the driving current of an at least LED backlight subregion higher than default
The accumulative duration of electric current.It should be noted that above-mentioned predetermined current can by those skilled in the art be based on actual conditions into
Row setting, the present embodiment are not especially limited this.
Specifically, in the present embodiment, step S104 includes：
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after adjusting if detecting in step a1
Higher than predetermined current, then the driving current for recording an at least LED backlight subregion is higher than the first continuous duration of predetermined current；
In the present embodiment, the driving current that television terminal records an at least LED backlight subregion is higher than the first of predetermined current
That is, there is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment in continuous duration
When higher than predetermined current, the driving current of a start recording at least LED backlight subregion is higher than the duration of predetermined current, and works as
When detecting that the driving current of an at least LED backlight subregion is become less than by being higher than predetermined current or is equal to predetermined current, terminate
The driving current for recording an at least LED backlight subregion is higher than the duration of predetermined current, to obtain an at least LED backlight point
The driving current in area is higher than the first continuous duration of predetermined current.
Step a2, when detecting that the driving current of an at least LED backlight subregion becomes less than or waited by being higher than predetermined current
When predetermined current, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current continuously continues
Duration determines the back-off duration of the first continuous duration；
The difference of first continuous duration and the back-off duration is determined as the driving of an at least LED backlight subregion by step a3
Electric current is higher than the accumulative duration of predetermined current.
In the present embodiment, when detecting that the driving current of an at least LED backlight subregion becomes less than by being higher than predetermined current
Or when equal to predetermined current, the driving current of a television terminal start recording at least LED backlight subregion is become by being higher than predetermined current
For the duration less than or equal to predetermined current, and when detect the driving current of an at least LED backlight subregion by being less than or
When being changed to above predetermined current equal to predetermined current, the driving current for terminating a record at least LED backlight subregion is default by being higher than
Electric current become less than or equal to predetermined current duration, the driving current for obtaining an at least LED backlight subregion is less than or waits
In the second continuous duration of predetermined current, and determine according to the second continuous duration the back-off of the first continuous duration
Duration, then driving current that the difference of the first continuous duration and back-off duration is determined as to an at least LED backlight subregion are high
In the accumulative duration of predetermined current.
In specific implementation, during determining accumulative duration, when the driving for detecting an at least LED backlight subregion
When electric current is become less than by being higher than predetermined current or is equal to predetermined current, the first Current Temperatures of corresponding LED backlight subregion are obtained,
And when detecting that the driving current of an at least LED backlight subregion is changed to above predetermined current by being less than or equal to predetermined current,
The second Current Temperatures for obtaining corresponding LED backlight subregion, then determine back-off according to the first Current Temperatures and the second Current Temperatures
Coefficient, that is, calculate the temperature gap of the first Current Temperatures and the second Current Temperatures, and inquires between temperature gap and back-off coefficient
Mapping table, the corresponding back-off coefficient of the temperature gap is determined, then by the back-off coefficient and the second continuous duration
It is multiplied, to obtain back-off duration.It should be noted that the mapping table between temperature gap and back-off coefficient is by this field
Technical staff is obtained based on test of many times.
Specifically, in the present embodiment, step a2 includes：
Step a21, the mapping table inquired continuous duration and be buckled between coefficient determine that involving meter with second continues
The corresponding back-off coefficient of duration；
Back-off coefficient is multiplied by step a22 with the described second continuous duration, to determine the first continuous duration
It is buckled to duration.
The mapping table that television terminal is inquired continuous duration and is buckled between coefficient determines and continuously continues with second
The corresponding back-off coefficient of duration, and back-off coefficient is multiplied with the described second continuous duration, to determine that first continuously continues
The back-off duration of duration.It should be noted that the mapping table between continuous duration and back-off coefficient can be by by ability
Field technique personnel are obtained based on test of many times, and are buckled to coefficient and are less than or equal to 1.For example, setting the first continuous duration as 8
Second, the second continuous duration is 2 seconds, and the corresponding back-off coefficient of the second continuous duration is 0.5, then accumulative duration
It is 8-2*0.5=7 seconds.It, can be with by the way that the mapping table between continuous duration and back-off coefficient is arranged in the present embodiment
It obtains more accurately being buckled to coefficient, convenient for when meeting back-off condition, carrying out the back-off of accumulative duration, further effectively
Prevent since determining cumulative duration is inaccurate, and reduce the electric current of corresponding LED backlight subregion, reduce television terminal
Image display effect.
Specifically, in the present embodiment, step a2 further includes：
Step a23 obtains default back-off coefficient；
Default back-off coefficient is multiplied by step a24 with the second continuous duration, to determine the first continuous duration
It is buckled to duration.
In the present embodiment, television terminal obtains after getting the first continuous duration and the second continuous duration
Default back-off coefficient is taken, and default back-off coefficient is multiplied with the second continuous duration, to determine the first continuous duration
Back-off duration, it should be noted that above-mentioned default back-off coefficient is obtained by those skilled in the art based on test of many times,
Preferably, it is 0.2 to preset back-off coefficient.For example, setting the first continuous duration as 10 seconds, the second continuous duration is 4 seconds,
And default back-off coefficient is 0.2, then it is 10-4*0.2=9.2 seconds to add up duration.
Step S105 drops the driving current of an at least LED backlight subregion if accumulative duration reaches predetermined threshold value
Low is default safe current, and continues preset duration.
In the present embodiment, television terminal determines whether the cumulative duration reaches after determining cumulative duration
The current reduction of an at least LED backlight subregion is default peace if the cumulative duration reaches predetermined threshold value by predetermined threshold value
Total current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration, that is, pass through reduction pair
The electric current of LED backlight subregion is answered, and is kept for a period of time, can quickly reduce the temperature of corresponding LED backlight subregion.It needs
Bright, above-mentioned predetermined threshold value, default safe current and preset duration can be carried out by those skilled in the art based on actual conditions
Setting, the present embodiment is not especially limited this, it is preferable that predetermined threshold value is 15 seconds, default safe current be 130 milliamperes and
Preset duration is 30 seconds.
In the present embodiment, when detecting that the driving current of LED backlight subregion is higher than predetermined current, and duration is super
When crossing predetermined threshold value, the electric current of corresponding LED backlight subregion is reduced, and keeps preset duration, can quickly reduce the corresponding LED back ofs the body
The temperature of light subregion prevents LED from causing to damage since temperature is excessively high, improves the service life of LED.
Further, above-mentioned first or second embodiments are based on, it is proposed that the third of backlight brightness control method of the present invention
Embodiment, difference lies in the backlight brightness control method further includes with previous embodiment：
Step b calculates the power of each LED backlight subregion, and the power consumption of each LED backlight subregion is added, total to obtain LED
Power；
Whether step c determines LED general powers higher than default power；
Step d reduces the current backlight brightness of each LED backlight subregion if LED general powers are higher than default power.
In the present embodiment, television terminal in the process of running, calculates the power of each LED backlight subregion, and by each LED backlight
The power consumption of subregion is added, and to obtain LED general powers, is then compared LED general powers with default power, if LED
General power is less than or equal to default power, then is not processed, if LED general powers are higher than default power, reduces
The current backlight brightness of each LED backlight subregion.It should be noted that above-mentioned default power can be by those skilled in the art's base
It is configured in actual conditions, the present embodiment is not especially limited this.
Specifically, in the present embodiment, step d includes：
Step d1 inquires the mapping table of the LED general powers and backlight illumination decreasing value that prestore, determines that the LED is total
The corresponding backlight illumination decreasing value of power, and according to the backlight illumination decreasing value, reduce the current backlight of each LED backlight subregion
Brightness.
In the present embodiment, if LED general powers are higher than default power, television terminal inquires the LED total works to prestore
The mapping table of rate and backlight illumination decreasing value determines the corresponding backlight illumination decreasing value of LED general powers, and bright according to backlight
Decreasing value is spent, the current backlight brightness of each LED backlight subregion is reduced.
In the present embodiment, the present invention can be when the sum of power of each LED backlight subregion be higher than setting power, and adjustment is each
The current backlight brightness of LED backlight subregion prevents from causing power supply to damage since power is excessively high, improves the service life of power supply.
In addition, the embodiment of the present invention also proposes a kind of computer readable storage medium, the computer readable storage medium
On be stored with backlight illumination control program, backlight illumination control program realizes following steps when being executed by processor：
When receiving image to be displayed data, according to the image to be displayed data, the original of each LED backlight subregion is determined
Beginning backlight brightness values, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
Corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain each LED backlight point
The practical backlight brightness values in area；
According to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight point
The practical backlight brightness values in area adjust the backlight illumination of each LED backlight subregion.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
The mapping table between the practical backlight brightness values to prestore and luminance compensation coefficient is inquired, determines each LED backlight
The corresponding luminance compensation coefficient of practical backlight brightness values of subregion；
It is multiplied by corresponding luminance compensation coefficient with the practical backlight brightness values of each LED backlight subregion, to obtain each LED backlight
The brightness offset value of subregion；
With the practical backlight brightness values of each LED backlight subregion, in addition the corresponding brightness offset of each LED backlight subregion, with
Obtain the final backlight brightness values of each LED backlight subregion；
According to the final backlight brightness values of each LED backlight subregion, the backlight illumination of each LED backlight subregion is adjusted.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjusting higher than pre-
If when electric current, the driving current of an at least LED backlight subregion described in determination is higher than the accumulative duration of predetermined current；
If the accumulative duration reaches predetermined threshold value, the driving current of an at least LED backlight subregion is dropped
Low is default safe current, and continues preset duration.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
If detecting the driving current that there is an at least LED backlight subregion in each LED backlight subregion after adjusting higher than pre-
If electric current, then the driving current of an at least LED backlight subregion described in record is higher than the first continuous duration of predetermined current；
When detecting that the driving current of an at least LED backlight subregion becomes less than or by being higher than predetermined current equal to pre-
If when electric current, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current continuously continues
Duration determines the back-off duration of the described first continuous duration；
The difference of described first continuous duration and the back-off duration is determined as to the driving of an at least LED backlight subregion
Electric current is higher than the accumulative duration of predetermined current.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
The mapping table inquired continuous duration and be buckled between coefficient determines that involving meter with described second continues duration
Corresponding back-off coefficient；
The back-off coefficient is multiplied with the described second continuous duration, with the described first continuous duration of determination
It is buckled to duration.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
Obtain default back-off coefficient；
The default back-off coefficient is multiplied with the described second continuous duration, when continuously being continued with determination described first
Long back-off duration.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
The power of each LED backlight subregion is calculated, and the power consumption of each LED backlight subregion is added, to obtain LED general powers；
Determine the LED general powers whether higher than default power；
If the LED general powers are higher than default power, the current backlight brightness of each LED backlight subregion is reduced.
Further, following steps are also realized when the backlight illumination control program is executed by processor：
The mapping table for inquiring the LED general powers and backlight illumination decreasing value that prestore determines that the LED general powers correspond to
Backlight illumination decreasing value, and according to the backlight illumination decreasing value, reduce the current backlight brightness of each LED backlight subregion.
Each embodiment of the specific embodiment of computer readable storage medium of the present invention and above-mentioned backlight brightness control method
Essentially identical, therefore not to repeat here.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that process, method, article or system including a series of elements include not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or system institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including this
There is also other identical elements in the process of element, method, article or system.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical scheme of the present invention substantially in other words does the prior art
Going out the part of contribution can be expressed in the form of software products, which is stored in one as described above
In storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions use so that a station terminal equipment (can be mobile phone,
Computer, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of backlight brightness control method, which is characterized in that the backlight brightness control method includes the following steps：
When receiving image to be displayed data, according to the image to be displayed data, the original back of the body of each LED backlight subregion is determined
Brightness values, and determine the brightness influence value that each LED backlight subregion is influenced by remaining each LED backlight subregion；
Corresponding brightness influence value is subtracted with the initial backlight brightness value of each LED backlight subregion, to obtain each LED backlight subregion
Practical backlight brightness values；
According to luminance compensation coefficient corresponding with each practical backlight brightness values of LED backlight subregion and each LED backlight subregion
Practical backlight brightness values adjust the backlight illumination of each LED backlight subregion.
2. backlight brightness control method as described in claim 1, which is characterized in that the basis and each LED backlight subregion
The practical backlight brightness values of the practical corresponding luminance compensation coefficient of backlight brightness values and each LED backlight subregion adjust each LED back ofs the body
The backlight illumination step of light subregion includes：
The mapping table between the practical backlight brightness values to prestore and luminance compensation coefficient is inquired, determines each LED backlight subregion
The corresponding luminance compensation coefficient of practical backlight brightness values；
It is multiplied by corresponding luminance compensation coefficient with the practical backlight brightness values of each LED backlight subregion, to obtain each LED backlight subregion
Brightness offset value；
With the practical backlight brightness values of each LED backlight subregion, in addition the corresponding brightness offset of each LED backlight subregion, to obtain
The final backlight brightness values of each LED backlight subregion；
According to the final backlight brightness values of each LED backlight subregion, the backlight illumination of each LED backlight subregion is adjusted.
3. backlight brightness control method as claimed in claim 1 or 2, which is characterized in that the basis and each LED backlight subregion
The corresponding luminance compensation coefficient of practical backlight brightness values and each LED backlight subregion practical backlight brightness values, adjust each LED
After the step of backlight illumination of backlight subarea, further include：
Electricity is preset when detecting that the driving current that there is an at least LED backlight subregion in each LED backlight subregion after adjusting is higher than
When stream, the driving current of an at least LED backlight subregion described in determination is higher than the accumulative duration of predetermined current；
If the accumulative duration reaches predetermined threshold value, the driving current of an at least LED backlight subregion is reduced to
Default safe current, and continue preset duration.
4. backlight brightness control method as claimed in claim 3, which is characterized in that an at least LED backlight subregion described in determining
Driving current be higher than predetermined current accumulative duration the step of include：
If detecting the driving current that there is an at least LED backlight subregion in each LED backlight subregion after adjusting higher than default electricity
It flows, then the driving current of an at least LED backlight subregion described in record is higher than the first continuous duration of predetermined current；
When detecting that the driving current of an at least LED backlight subregion becomes less than or by being higher than predetermined current equal to default electricity
When stream, the second continuous duration of predetermined current is less than or equal to according to the driving current of an at least LED backlight subregion,
Determine the back-off duration of the described first continuous duration；
The difference of described first continuous duration and the back-off duration is determined as to the driving current of an at least LED backlight subregion
Higher than the accumulative duration of predetermined current.
5. backlight brightness control method as claimed in claim 4, which is characterized in that according to an at least LED backlight subregion
Driving current be less than or equal to predetermined current the second continuous duration, determine the back-off of the described first continuous duration
The step of duration includes：
The mapping table inquired continuous duration and be buckled between coefficient determines that involve the continuous duration of meter with described second corresponding
Back-off coefficient；
The back-off coefficient is multiplied with the described second continuous duration, with the back-off of the described first continuous duration of determination
Duration.
6. backlight brightness control method as claimed in claim 4, which is characterized in that according to an at least LED backlight subregion
Driving current be less than or equal to predetermined current the second continuous duration, determine the back-off of the described first continuous duration
The step of duration further includes：
Obtain default back-off coefficient；
The default back-off coefficient is multiplied with the described second continuous duration, with the described first continuous duration of determination
It is buckled to duration.
7. backlight brightness control method as claimed in claim 1 or 2, which is characterized in that the basis and each LED backlight subregion
The corresponding luminance compensation coefficient of practical backlight brightness values and each LED backlight subregion practical backlight brightness values, adjust each LED
After the step of backlight illumination of backlight subarea, further include：
The power of each LED backlight subregion is calculated, and the power consumption of each LED backlight subregion is added, to obtain LED general powers；
Determine the LED general powers whether higher than default power；
If the LED general powers are higher than default power, the current backlight brightness of each LED backlight subregion is reduced.
8. backlight brightness control method as claimed in claim 7, which is characterized in that described to reduce working as each LED backlight subregion
The step of preceding backlight illumination includes：
The mapping table for inquiring the LED general powers and backlight illumination decreasing value that prestore, determines the corresponding back of the body of the LED general powers
Brightness decreasing value, and according to the backlight illumination decreasing value, reduce the current backlight brightness of each LED backlight subregion.
9. a kind of television terminal, which is characterized in that the television terminal includes：Memory, processor and it is stored in the storage
On device and the backlight illumination control program that can run on the processor, the backlight illumination control program by the processor
It is realized such as the step of backlight brightness control method described in any item of the claim 1 to 8 when execution.
10. a kind of computer readable storage medium, which is characterized in that it is bright to be stored with backlight on the computer readable storage medium
Degree control program, the backlight illumination control program are realized when being executed by processor as described in any item of the claim 1 to 8
The step of backlight brightness control method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810528389.5A CN108766367A (en) | 2018-05-28 | 2018-05-28 | Backlight brightness control method, television terminal and computer readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528389.5A CN108766367A (en) | 2018-05-28 | 2018-05-28 | Backlight brightness control method, television terminal and computer readable storage medium |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109637459A (en) * | 2018-11-26 | 2019-04-16 | 惠州市华星光电技术有限公司 | A kind of backlight back light brightness regulating method |
| CN109887468A (en) * | 2019-04-02 | 2019-06-14 | 合肥工业大学 | A kind of liquid crystal display dynamic light adjustment method based on image local feature |
| CN110189715A (en) * | 2019-06-28 | 2019-08-30 | 京东方科技集团股份有限公司 | For controlling the method and device thereof and display device of the display of display equipment |
| CN111383604A (en) * | 2018-12-27 | 2020-07-07 | 深圳Tcl新技术有限公司 | Method, system and storage medium for improving regional dimming algorithm |
| CN113129841A (en) * | 2019-12-30 | 2021-07-16 | 惠州视维新技术有限公司 | Partitioned backlight control method, terminal and storage medium |
| WO2021208827A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳光峰科技股份有限公司 | Light source brightness adjustment method and system, and electronic device and computer readable storage medium |
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2018
- 2018-05-28 CN CN201810528389.5A patent/CN108766367A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109637459A (en) * | 2018-11-26 | 2019-04-16 | 惠州市华星光电技术有限公司 | A kind of backlight back light brightness regulating method |
| CN111383604A (en) * | 2018-12-27 | 2020-07-07 | 深圳Tcl新技术有限公司 | Method, system and storage medium for improving regional dimming algorithm |
| CN109887468A (en) * | 2019-04-02 | 2019-06-14 | 合肥工业大学 | A kind of liquid crystal display dynamic light adjustment method based on image local feature |
| CN110189715A (en) * | 2019-06-28 | 2019-08-30 | 京东方科技集团股份有限公司 | For controlling the method and device thereof and display device of the display of display equipment |
| WO2020259160A1 (en) * | 2019-06-28 | 2020-12-30 | 京东方科技集团股份有限公司 | Method and device thereof for controlling display of display device, and display device |
| CN110189715B (en) * | 2019-06-28 | 2022-08-09 | 京东方科技集团股份有限公司 | Method for controlling display of display device, apparatus thereof, and display apparatus |
| US11676549B2 (en) | 2019-06-28 | 2023-06-13 | BOE MLED Technology Co., Ltd. | Method of controlling display of display device, apparatus thereof, and display apparatus |
| CN113129841A (en) * | 2019-12-30 | 2021-07-16 | 惠州视维新技术有限公司 | Partitioned backlight control method, terminal and storage medium |
| WO2021208827A1 (en) * | 2020-04-13 | 2021-10-21 | 深圳光峰科技股份有限公司 | Light source brightness adjustment method and system, and electronic device and computer readable storage medium |
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