CN108766366A - LED backlight subregion current control method, television terminal and readable storage medium storing program for executing - Google Patents
LED backlight subregion current control method, television terminal and readable storage medium storing program for executing Download PDFInfo
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- CN108766366A CN108766366A CN201810526939.XA CN201810526939A CN108766366A CN 108766366 A CN108766366 A CN 108766366A CN 201810526939 A CN201810526939 A CN 201810526939A CN 108766366 A CN108766366 A CN 108766366A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of LED backlight subregion current control methods,Television terminal and readable storage medium storing program for executing,The initial backlight brightness of each LED backlight subregion and corresponding luminance compensation coefficient are determined based on image to be displayed data,And the initial backlight brightness based on each LED backlight subregion and corresponding luminance compensation coefficient,Adjust the initial backlight brightness of each LED backlight subregion,Ensure the brightness uniformity of each LED backlight subregion,In addition,It is higher than predetermined current in the driving current for having LED backlight subregion,And duration be more than predetermined threshold value when,Reduce the electric current of corresponding LED backlight subregion,And keep preset duration,The temperature of corresponding LED backlight subregion can quickly be reduced,Prevent LED from causing to damage since temperature is excessively high,Improve the service life of LED,It can be while ensureing the brightness uniformity of each LED backlight subregion,Control the temperature of LED backlight subregion,Prevent LED from causing to damage since temperature is excessively high.
Description
Technical field
The present invention relates to LCD TV field more particularly to a kind of LED backlight subregion current control method, television terminal and
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 accurately 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
There is discreteness in LED, and the problem of display screen glass substrate uniformity, the incomplete phase of brightness that the LED of different subregions is sent out
Together, lead to the brightness irregularities of each LED backlight subregion, in addition, when backlight illumination is higher, need the electric current for flowing through LED also larger,
It is easy to cause LED fevers so that LED is in the higher state of temperature, and works long hours since liquid crystal display generally requires,
So that LED is under the higher state of temperature for a long time, it is easy to cause LED overheats and burns out.
Therefore, how while ensureing the brightness uniformity of each LED backlight subregion, the temperature of LED backlight subregion is controlled, is prevented
Only LED causes damage to be current urgent problem to be solved since temperature is excessively high.
Invention content
The main purpose of the present invention is to provide a kind of LED backlight subregion current control method, television terminal and readable deposit
Storage media, it is intended to while ensureing the brightness uniformity of each LED backlight subregion, control LED backlight subregion temperature, prevent LED by
Cause to damage in temperature is excessively high.
To achieve the above object, the present invention provides a kind of LED backlight subregion current control method, the LED backlight subregion
Current control method includes the 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 illumination and corresponding luminance compensation coefficient；
According to the corresponding luminance compensation coefficient of each LED backlight subregion, the initial backlight brightness of each LED backlight subregion is adjusted,
And detect adjustment after each LED backlight subregion driving current whether be higher than predetermined current；
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment 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, according to the image to be displayed data, initial backlight brightness and the correspondence of each LED backlight subregion are determined
Luminance compensation coefficient the step of include：
According to the image to be displayed data, the initial backlight brightness of each LED backlight subregion is determined；
The mapping table between the initial backlight brightness to prestore and luminance compensation coefficient is inquired, determines each LED backlight point
The corresponding luminance compensation coefficient of initial backlight brightness in area.
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：
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 an at least LED backlight subregion
Driving 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 and the described second continuous 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, the LED backlight subregion current control method further includes：
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；
The LED general powers are compared with 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.
Optionally, the LED backlight subregion current control method further includes：
When the driving current of an at least LED backlight subregion is higher than predetermined current after detecting adjustment, Sleep protection is triggered
Timing；
When the time duration of the Sleep protection timing reaches default time duration, by the driving of each LED backlight subregion
Current reduction is default safe current.
In addition, to achieve the above object, the present invention also provides a kind of television terminal, the television terminal includes：Memory,
Processor and the LED backlight subregion current control program that is stored on the memory and can run on the processor, institute
It states when LED backlight subregion current control program is executed by the processor and realizes LED backlight subregion current control as described above
The step of method.
The present invention also provides a kind of readable storage medium storing program for executing, LED backlight subregion electric current is stored on the readable storage medium storing program for executing
Program is controlled, the LED backlight subregion current control program realizes LED backlight subregion electricity as described above when being executed by processor
The step of method of flow control.
The present invention proposes a kind of LED backlight subregion current control method, television terminal and readable storage medium storing program for executing, based on waiting showing
Show that image data determines the initial backlight brightness of each LED backlight subregion and corresponding luminance compensation coefficient, and is carried on the back based on each LED
The initial backlight brightness of light subregion and corresponding luminance compensation coefficient adjust the initial backlight brightness of each LED backlight subregion, protect
The brightness uniformity of each LED backlight subregion is demonstrate,proved, in addition, it is higher than predetermined current in the driving current for having LED backlight subregion, and it is lasting
When time is more than certain value, the electric current of corresponding LED backlight subregion is reduced, and is kept for a period of time, can quickly reduce correspondence
The temperature of LED backlight subregion prevents LED from causing to damage since temperature is excessively high, improves the service life of LED, can ensure respectively
While the brightness uniformity of LED backlight subregion, the temperature of LED backlight subregion is controlled, prevents LED from causing to damage since temperature is excessively high
It is bad.
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 LED backlight subregion current 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 LED backlight subregion current 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 module, Subscriber Interface Module SIM and LED backlight subregion current control program.
In television terminal shown in Fig. 1, processor 1001 can be used for calling the LED backlight stored in memory 1005
Subregion current 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 illumination and corresponding luminance compensation coefficient；
According to the corresponding luminance compensation coefficient of each LED backlight subregion, the initial backlight brightness of each LED backlight subregion is adjusted,
And detect adjustment after each LED backlight subregion driving current whether be higher than predetermined current；
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment 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 LED backlight subregion current control stored in memory 1005
Program also executes following steps：
According to the image to be displayed data, the initial backlight brightness of each LED backlight subregion is determined；
The mapping table between the initial backlight brightness to prestore and luminance compensation coefficient is inquired, determines each LED backlight point
The corresponding luminance compensation coefficient of initial backlight brightness in area.
Further, processor 1001 can be used for calling the LED backlight subregion current control stored in memory 1005
Program also executes following steps：
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 an at least LED backlight subregion
Driving current is higher than the accumulative duration of predetermined current.
Further, processor 1001 can be used for calling the LED backlight subregion current control stored in memory 1005
Program also executes following steps：
The mapping table inquired continuous duration and be buckled between coefficient determines and the described second continuous 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 LED backlight subregion current control stored in memory 1005
Program also executes 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 LED backlight subregion current control stored in memory 1005
Program also executes 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；
The LED general powers are compared with 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 LED backlight subregion current control stored in memory 1005
Program also executes 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.
Further, processor 1001 can be used for calling the LED backlight subregion current control stored in memory 1005
Program also executes following steps：
When the driving current of an at least LED backlight subregion is higher than predetermined current after detecting adjustment, Sleep protection is triggered
Timing；
When the time duration of the Sleep protection timing reaches default time duration, by the driving of each LED backlight subregion
Current reduction is default safe current.
Each specific embodiment of the specific embodiment of television terminal of the present invention and following LED backlight subregion current control methods
Essentially identical, therefore not to repeat here.
It is the flow diagram of LED backlight subregion current control method first embodiment of the present invention with reference to Fig. 2, Fig. 2.
The LED backlight subregion current control method is applied to television terminal, is chosen as television terminal shown in FIG. 1, the LED
Backlight subarea current control method 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 in area and corresponding luminance compensation coefficient；
Step S102 adjusts the original of each LED backlight subregion according to the corresponding luminance compensation coefficient of each LED backlight subregion
Backlight illumination, and detect adjustment after each LED backlight subregion driving current whether be higher than predetermined current；
Step S103, when detect adjustment 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；
Step S104 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.
Since LED has discreteness, and the problem of display screen glass substrate uniformity, the LED of different subregions sends out bright
It spends not exactly the same, leads to the brightness irregularities of each LED backlight subregion, in addition, when backlight illumination is higher, need to flow through LED's
Electric current is also larger, is easy to cause LED fevers so that LED is in the higher state of temperature, and since liquid crystal display generally requires
It works long hours so that LED under the higher state of temperature, is easy to cause LED overheats and burns out for a long time.To solve above-mentioned ask
Topic, the present embodiment proposes a kind of LED backlight subregion current control method, below to each of LED backlight subregion current control method
Step is described in detail：
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 in area and corresponding luminance compensation coefficient；
In the present embodiment, when receiving image to be displayed data, according to image to be displayed data, each LED backlight is determined
The initial backlight brightness of subregion and corresponding luminance compensation coefficient, wherein television terminal includes liquid crystal display, and the liquid crystal
Display screen uses LED as backlight, while liquid crystal display includes multiple LED backlight subregions, and each LED backlight subregion is extremely
Include a LED less.There are mapping relations with luminance compensation coefficient for initial backlight brightness, i.e., can determine pair by initial backlight brightness
The luminance compensation coefficient answered, luminance compensation coefficient be just, value or zero increase LED backlight point if luminance compensation coefficient is just
The backlight illumination in area reduces the backlight illumination of LED backlight subregion if luminance compensation coefficient is negative, if luminance compensation system
Number is zero, then the backlight illumination of LED backlight subregion does not change.
Specifically, in the present embodiment, step S101 includes：
Step a1 determines the initial backlight brightness of each LED backlight subregion according to image to be displayed data；
Step a2 inquires the mapping table between the initial backlight brightness to prestore and luminance compensation coefficient, determines each LED
The corresponding luminance compensation coefficient of initial backlight brightness of backlight subarea.
In the present embodiment, television terminal determines that the initial backlight of each LED backlight subregion is bright according to image to be displayed data
Degree counts the backlight illumination of each LED backlight subregion in image to be displayed data, obtains the brightness histogram of each LED backlight subregion
Scheme, and determines the initial backlight brightness of each LED backlight subregion by the brightness histogram；Then the initial backlight brightness to prestore is inquired
With the mapping table between luminance compensation coefficient, the corresponding luminance compensation of initial backlight brightness of each LED backlight subregion is determined
Coefficient, it should be noted that the mapping table between above-mentioned initial backlight brightness and luminance compensation coefficient can be by this field skill
Art personnel are obtained by test of many times.
Specifically test method is to be obtained most from image to be displayed data when often receiving an image to be displayed data
Big brightness data, and each LED backlight subregion is lighted with maximum luminance data, then acquire the present intensity of each LED backlight subregion
Value, and average brightness value is calculated according to the present intensity value of each LED backlight subregion, subsequently calculate working as each LED backlight subregion
Luminance difference between preceding brightness value and average brightness value, and the corresponding brightness difference for calculating each LED backlight subregion account for it is current bright
The ratio of angle value, i.e. luminance difference ratio, and be each LED backlight subregion by the luminance difference ratio-dependent of each LED backlight subregion
Present intensity value luminance compensation coefficient, by test of many times, obtain each LED backlight subregion brightness value and for it is bright
Penalty coefficient is spent, to establish the mapping table between initial backlight brightness and luminance compensation coefficient, wherein present intensity value
Luminance compensation coefficient higher than the LED backlight subregion of average brightness value is that just, present intensity value is carried on the back less than the LED of average brightness value
The luminance compensation coefficient of light subregion is negative, and present intensity value is equal to the luminance compensation coefficient of the LED backlight subregion of average brightness value
It is zero.
Step S102 adjusts the original of each LED backlight subregion according to the corresponding luminance compensation coefficient of each LED backlight subregion
Backlight illumination, and detect adjustment after each LED backlight subregion driving current whether be higher than predetermined current；
In the present embodiment, television terminal is mended in the initial backlight brightness for determining each LED backlight subregion and corresponding brightness
After repaying coefficient, according to the corresponding luminance compensation coefficient of each LED backlight subregion, the initial backlight for adjusting each LED backlight subregion is bright
Degree, that is, obtain the initial backlight brightness of each LED backlight subregion, and according to reflecting between initial backlight brightness and luminance compensation coefficient
Relation table is penetrated, corresponding luminance compensation coefficient is obtained, then according to the luminance compensation coefficient, adjusts corresponding LED backlight subregion
Initial backlight brightness is multiplied by corresponding luminance compensation coefficient with the initial backlight brightness of each LED backlight subregion, each to obtain
The compensation backlight illumination of LED backlight subregion is used in combination the initial backlight brightness of each LED backlight subregion plus each LED backlight subregion
Backlight illumination is compensated, so as to adjust the initial backlight brightness of each LED backlight subregion；Then each LED backlight subregion after detection adjustment
Driving current whether be higher than predetermined current, i.e., divide with the presence or absence of an at least LED backlight in each LED backlight subregion after detection adjustment
The driving current in area is higher than predetermined current, if detecting after adjustment there is an at least LED backlight subregion in each LED backlight subregion
Driving current be higher than predetermined current, then it represents that the electric current of an at least LED backlight subregion is excessively high, wherein driving current be used for point
LED light in bright LED backlight subregion.It should be noted that above-mentioned predetermined current can be based on practical feelings by those skilled in the art
Condition is configured, and the present embodiment is not especially limited this.
Step S103, when detect adjustment 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, there is the driving of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment
When electric current is higher than predetermined current, television terminal determines that the driving current of an at least LED backlight subregion is accumulative higher than predetermined current
Duration, the i.e. at least driving current of a LED backlight subregion are higher than the duration of predetermined current, and determine that this is accumulative lasting
Whether duration reaches predetermined threshold value, if the accumulative duration reaches predetermined threshold value, then it represents that corresponding LED backlight subregion is worked as
Preceding temperature is higher, needs the driving current for adjusting corresponding LED backlight subregion, reduces temperature.
Specifically, include with reference to Fig. 3, step S103：
Step S1031, when first of driving current higher than predetermined current of a record at least LED backlight subregion continuously continues
It is long；
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 S1032, become less than by being higher than predetermined current when detecting the driving current of an at least LED backlight subregion or
When equal to predetermined current, second according to the driving current of an at least LED backlight subregion less than or equal to predetermined current continuously holds
Continuous 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 an at least LED backlight subregion by step S1033
Driving current be higher than predetermined current accumulative duration.
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.
Specifically, in the present embodiment, step S1032 includes：
Step b1, the mapping table inquired continuous duration and be buckled between coefficient determine and continuously continue with second
The corresponding back-off coefficient of duration；
Back-off coefficient is multiplied by step b2 with the described second continuous duration, to determine the first continuous duration
It is buckled to duration.
In the present embodiment, television terminal inquire continuous duration and be buckled to coefficient between mapping table, determine with
The corresponding back-off coefficient of second continuous duration, and back-off coefficient is multiplied with the described second continuous duration, with determination
The back-off duration of first continuous duration.It should be noted that the mapping relations between continuous duration and back-off coefficient
Table can be by being obtained by those skilled in the art based on test of many times, and is buckled to coefficient and is less than or equal to 1.For example, it is continuous to set first
Duration is 8 seconds, and the second continuous duration is 2 seconds, and the corresponding back-off coefficient of the second continuous duration is 0.5, then
Accumulative duration is 8-2*0.5=7 seconds, in another example, if the first continuous duration is 12 seconds, the second continuous duration is
5 seconds, and the corresponding back-off coefficient of the second continuous duration is 0.4, then it is 12-5*0.4=10 seconds to add up duration.At this
In embodiment, by the way that the mapping table between continuous duration and back-off coefficient is arranged, can more accurately it be buckled to
Coefficient is further effectively prevented due to determining convenient for when meeting back-off condition, carrying out the back-off of accumulative duration
Cumulative duration is inaccurate, and reduces the electric current of corresponding LED backlight subregion, reduces the image display effect of television terminal.
Specifically, in the present embodiment, step S1032 further includes：
Step b3 obtains default back-off coefficient；
Default back-off coefficient is multiplied by step b4 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, in another example, if the first continuous duration
It it is 8 seconds, the second continuous duration is 5 seconds, and default back-off coefficient is 0.2, then it is 8-5*0.2=7 seconds to add up duration.
In the present embodiment, coefficient is buckled to by setting, can carried out the back-off of accumulative duration when meeting back-off condition, have
Effect is prevented since determining cumulative duration is inaccurate, and reduces the electric current of corresponding LED backlight subregion, reduces television terminal
Image display effect.
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.In the present embodiment, due to the generation of heat to disperse it is related with temperature,
Back-off coefficient can be determined more accurately by temperature gap, accumulative duration can be carried out when meeting back-off condition
Back-off, further effectively prevent since determining cumulative duration is inaccurate, and reduce corresponding LED backlight subregion
Electric current reduces the image display effect of television terminal.
What the specific method of determination of accumulative duration listed above was merely exemplary, those skilled in the art utilize
The technological thought of the present invention, the concrete mode that the various other determinations proposed according to its specific requirements add up duration exist
In protection scope of the present invention, herein without exhaustive one by one.
Step S104 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, initial backlight brightness and the correspondence of each LED backlight subregion are determined based on image to be displayed data
Luminance compensation coefficient, and the initial backlight brightness based on each LED backlight subregion and corresponding luminance compensation coefficient, adjustment is each
The driving current of LED backlight subregion ensures the brightness uniformity of each LED backlight subregion, in addition, in the driving for having LED backlight subregion
Electric current is higher than predetermined current, and when duration is more than certain value, reduces the electric current of corresponding LED backlight subregion, and keep one
The section time, the temperature of corresponding LED backlight subregion can be quickly reduced, prevents LED from causing to damage since temperature is excessively high, improved
The service life of LED can control the temperature of LED backlight subregion while ensureing the brightness uniformity of each LED backlight subregion,
Prevent LED from causing to damage since temperature is excessively high.
Further, with reference to Fig. 4, it is based on above-mentioned first embodiment, it is proposed that LED backlight subregion of the present invention current control side
The second embodiment of method, difference lies in the LED backlight subregion current control method further includes with previous embodiment：
Step S105 calculates the power of each LED backlight subregion, and the power consumption of each LED backlight subregion is added, to obtain
LED general powers；
LED general powers are compared by step S106 with default power；
Step S107, if LED general powers are higher than default power, the current backlight for reducing each LED backlight subregion is bright
Degree.
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 S107 includes：
Step c inquires the mapping table of the LED general powers and backlight illumination decreasing value that prestore, determines LED general powers pair
The backlight illumination decreasing value answered, and according to backlight illumination decreasing value, reduce the current backlight brightness of each LED backlight subregion.
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.
Further, above-mentioned first or second embodiments are based on, it is proposed that LED backlight subregion current control method of the present invention
3rd embodiment, difference lies in the LED backlight subregion current control method further includes with previous embodiment：
Step d, when the driving current of an at least LED backlight subregion is higher than predetermined current after detecting adjustment, triggering is stopped
It sleeps and protects timing；
Step e, when the time duration of Sleep protection timing reaches default time duration, by the drive of each LED backlight subregion
Streaming current is reduced to default safe current.
It should be noted that the present invention is based on previous embodiments, it is proposed that a kind of specific suspend mode side of LED backlight subregion
Formula is only explained below, other to can refer to previous embodiment.
In the present embodiment, the driving current of television terminal at least LED backlight subregion after detecting adjustment is higher than default
When electric current, Sleep protection timing is triggered, that is, proceeds by the time duration of record Sleep protection timing, and works as Sleep protection timing
Time duration when reaching default time duration, be default safe current by the current reduction of each LED backlight subregion, and persistently set
Timing is long, and after the duration that the electric current of each LED backlight subregion is default safe current reaches setting duration, it will be each
The electric current of LED backlight subregion is increased to default maximum current.It should be noted that above-mentioned default safe current, it is default accumulative when
Long and default maximum current can be configured by those skilled in the art based on actual conditions, and the present embodiment is not made this specifically
It limits, it is preferable that default safe current, default time duration and default maximum current are respectively 130 milliamperes, 2 hours and 180 millis
Peace.
In the present embodiment, the present invention is when meeting the sleep condition of LED backlight subregion, by the electric current of each LED backlight subregion
It is reduced to safe current, further improves the service life of LED backlight subregion.
In addition, the embodiment of the present invention also proposes a kind of readable storage medium storing program for executing, the LED back ofs the body are stored on the readable storage medium storing program for executing
Light subregion current control program, the LED backlight subregion current control program realize 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 illumination and corresponding luminance compensation coefficient；
According to the corresponding luminance compensation coefficient of each LED backlight subregion, the initial backlight brightness of each LED backlight subregion is adjusted,
And detect adjustment after each LED backlight subregion driving current whether be higher than predetermined current；
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment 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 LED backlight subregion current control program is executed by processor：
According to the image to be displayed data, the initial backlight brightness of each LED backlight subregion is determined；
The mapping table between the initial backlight brightness to prestore and luminance compensation coefficient is inquired, determines each LED backlight point
The corresponding luminance compensation coefficient of initial backlight brightness in area.
Further, following steps are also realized when the LED backlight subregion current control program is executed by processor：
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 an at least LED backlight subregion
Driving current is higher than the accumulative duration of predetermined current.
Further, following steps are also realized when the LED backlight subregion current control program is executed by processor：
The mapping table inquired continuous duration and be buckled between coefficient determines and the described second continuous 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 LED backlight subregion current 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 LED backlight subregion current 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；
The LED general powers are compared with 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 LED backlight subregion current 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.
Further, following steps are also realized when the LED backlight subregion current control program is executed by processor：
When the driving current of an at least LED backlight subregion is higher than predetermined current after detecting adjustment, Sleep protection is triggered
Timing；
When the time duration of the Sleep protection timing reaches default time duration, by the driving of each LED backlight subregion
Current reduction is default safe current.
Each embodiment of the specific embodiment of readable storage medium storing program for executing of the present invention and above-mentioned LED backlight subregion current 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 LED backlight subregion current control method, which is characterized in that the LED backlight subregion current control method includes
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 and corresponding luminance compensation coefficient；
According to the corresponding luminance compensation coefficient of each LED backlight subregion, the initial backlight brightness of each LED backlight subregion is adjusted, and is examined
Whether the driving current for surveying each LED backlight subregion after adjusting is higher than predetermined current；
There is the driving current of an at least LED backlight subregion in each LED backlight subregion after detecting adjustment higher than default electricity
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.
2. LED backlight subregion current control method as described in claim 1, which is characterized in that according to the image to be displayed
Data, the step of determining the initial backlight brightness of each LED backlight subregion and corresponding luminance compensation coefficient include：
According to the image to be displayed data, the initial backlight brightness of each LED backlight subregion is determined；
The mapping table between the initial backlight brightness to prestore and luminance compensation coefficient is inquired, determines each LED backlight subregion
The corresponding luminance compensation coefficient of initial backlight brightness.
3. LED backlight subregion current control method as described in claim 1, which is characterized in that at least LED back ofs the body described in determining
The driving current of light subregion be higher than predetermined current accumulative duration the step of include：
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 of an at least LED backlight subregion
Electric current is higher than the accumulative duration of predetermined current.
4. LED backlight subregion current control method as claimed in claim 3, which is characterized in that carried on the back according to an at least LED
The driving current of light subregion is less than or equal to the second continuous duration of predetermined current, determines the described first continuous duration
Back-off duration the step of include：
The mapping table inquired continuous duration and be buckled between coefficient, determination are corresponding with the described second continuous duration
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.
5. LED backlight subregion current control method as claimed in claim 3, which is characterized in that carried on the back according to an at least LED
The driving current of light subregion is less than or equal to the second continuous duration of predetermined current, determines the described first continuous duration
Back-off duration the step of further include：
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.
6. the LED backlight subregion current control method as described in any one of claim 1-5, which is characterized in that the LED back ofs the body
Light subregion current control method further includes：
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；
The LED general powers are compared with default power；
If the LED general powers are higher than default power, the current backlight brightness of each LED backlight subregion is reduced.
7. LED backlight subregion current control method as claimed in claim 3, which is characterized in that described to reduce each LED backlight point
The step of current backlight brightness in area 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.
8. the LED backlight subregion current control method as described in any one of claim 1-5, which is characterized in that the LED back ofs the body
Light subregion current control method further includes：
When the driving current of an at least LED backlight subregion is higher than predetermined current after detecting adjustment, Sleep protection timing is triggered；
When the time duration of the Sleep protection timing reaches default time duration, by the driving current of each LED backlight subregion
It is reduced to default safe current.
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 LED backlight subregion current control program that can run on the processor, the LED backlight subregion current control journey
It is realized such as LED backlight subregion current control method described in any item of the claim 1 to 8 when sequence is executed by the processor
Step.
10. a kind of readable storage medium storing program for executing, which is characterized in that be stored with LED backlight subregion electric current control on the readable storage medium storing program for executing
Processing procedure sequence is realized when the LED backlight subregion current control program is executed by processor such as any one of claim 1 to 8 institute
The step of LED backlight subregion current control method stated.
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| CN201810526939.XA CN108766366A (en) | 2018-05-28 | 2018-05-28 | LED backlight subregion current control method, television terminal and readable storage medium storing program for executing |
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| CN201810526939.XA CN108766366A (en) | 2018-05-28 | 2018-05-28 | LED backlight subregion current control method, television terminal and readable storage medium storing program for executing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109346016A (en) * | 2018-11-29 | 2019-02-15 | 厦门天马微电子有限公司 | Backing structure, the brightness adjusting method of backing structure and display device |
| CN109493780A (en) * | 2018-11-30 | 2019-03-19 | 深圳市华星光电半导体显示技术有限公司 | Displaying panel driving method |
| CN111524488A (en) * | 2020-04-13 | 2020-08-11 | 广东天波信息技术股份有限公司 | Self-adaptive adjustment method and device for preventing display screen from overheating |
| CN112967687A (en) * | 2021-02-26 | 2021-06-15 | Tcl华星光电技术有限公司 | Method for preventing backlight module from overheating and display device |
| 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 |
| CN113178172A (en) * | 2021-04-16 | 2021-07-27 | Tcl华星光电技术有限公司 | Gray scale control method and display panel |
| WO2022127343A1 (en) * | 2020-12-14 | 2022-06-23 | 北京显芯科技有限公司 | Control method for backlight circuit, backlight circuit and lcd display screen |
| US11393412B2 (en) | 2020-04-29 | 2022-07-19 | Asustek Computer Inc. | Electronic device and temperature adjustment method thereof |
| CN115762427A (en) * | 2022-11-21 | 2023-03-07 | 广西世纪创新显示电子有限公司 | Display screen brightness control method and device, display screen and storage medium |
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| 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 |
| CN111524488A (en) * | 2020-04-13 | 2020-08-11 | 广东天波信息技术股份有限公司 | Self-adaptive adjustment method and device for preventing display screen from overheating |
| CN111524488B (en) * | 2020-04-13 | 2021-05-11 | 广东天波信息技术股份有限公司 | Self-adaptive adjustment method and device for preventing display screen from overheating |
| US11393412B2 (en) | 2020-04-29 | 2022-07-19 | Asustek Computer Inc. | Electronic device and temperature adjustment method thereof |
| WO2022127343A1 (en) * | 2020-12-14 | 2022-06-23 | 北京显芯科技有限公司 | Control method for backlight circuit, backlight circuit and lcd display screen |
| CN112967687A (en) * | 2021-02-26 | 2021-06-15 | Tcl华星光电技术有限公司 | Method for preventing backlight module from overheating and display device |
| WO2022178924A1 (en) * | 2021-02-26 | 2022-09-01 | Tcl华星光电技术有限公司 | Method for preventing overheating of backlight module and display device |
| CN113178172A (en) * | 2021-04-16 | 2021-07-27 | Tcl华星光电技术有限公司 | Gray scale control method and display panel |
| WO2022217730A1 (en) * | 2021-04-16 | 2022-10-20 | Tcl华星光电技术有限公司 | Grayscale control method and display panel |
| US11948491B2 (en) | 2021-04-16 | 2024-04-02 | Tcl China Star Optoelectronics Technology Co., Ltd | Grayscale controlling method and display panel |
| CN115762427A (en) * | 2022-11-21 | 2023-03-07 | 广西世纪创新显示电子有限公司 | Display screen brightness control method and device, display screen and storage medium |
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Application publication date: 20181106 |