CN108364614A - LED excess temperature protection methods, terminal and computer readable storage medium - Google Patents
LED excess temperature protection methods, terminal and computer readable storage medium Download PDFInfo
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- 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
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Abstract
The invention discloses a kind of LED excess temperature protection methods, terminal and computer readable storage medium, for using LED as the terminal of backlight, when receiving image to be displayed data, and the electric current of each LED backlight subregion is when presetting maximum current, the current duty cycle for determining whether there is an at least LED backlight subregion is higher than predetermined current duty ratio, if the current duty cycle in the presence of an at least LED backlight subregion is higher than predetermined current duty ratio, then determine that the current duty cycle of an at least LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio, if cumulative duration reaches predetermined threshold value, it is then safe current by the current reduction of corresponding LED backlight subregion, and kept for a period of time, the temperature of corresponding LED backlight subregion can quickly be reduced, prevent LED from causing to damage since temperature is excessively high.
Description
Technical field
The present invention relates to a kind of technical field of image display processing more particularly to LED excess temperature protection methods, terminal and meters
Calculation machine 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, by using HDR (High-Dynamic Range, high dynamic range images) technology, can effectively improve
Brightness of image range and abundant picture color, with the raising of brightness of image range, the current range of LED also improves therewith, and
When the brightness of image to be displayed is higher, need the electric current for flowing through LED also larger so that backlight illumination reaches image to be displayed
Brightness requirement, and the electric current for flowing through LED is bigger is easy to cause LED fevers so that and LED is in the higher state of temperature, and due to
Liquid crystal display, which generally requires, to work long hours so that LED under the higher state of temperature, is easy to cause LED mistakes for a long time
Heat is burnt out.
Therefore, how when the temperature of LED is higher, the temperature of LED is quickly reduced, prevents LED from causing since temperature is excessively high
Damage is current urgent problem to be solved.
Invention content
The main purpose of the present invention is to provide a kind of LED excess temperature protection methods, terminal and computer readable storage medium,
It is intended to how when the temperature of LED is higher, quickly reduces the temperature of LED, prevent LED from causing to damage since temperature is excessively high.
To achieve the above object, the present invention provides a kind of LED excess temperature protection methods, and the LED excess temperature protection methods include
Following steps：
It is aobvious according to the piece source format of the image to be displayed data or present image when receiving image to be displayed data
Show pattern, it is determined whether by the current regulation of each LED backlight subregion be default maximum current；
If being default maximum current by the current regulation of each LED backlight subregion, it is determined whether there is an at least LED backlight
The current duty cycle of subregion is higher than predetermined current duty ratio；
If in the presence of an at least LED backlight subregion current duty cycle be higher than predetermined current duty ratio, it is determined that it is described at least
The current duty cycle of one LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio；
If the cumulative duration reaches predetermined threshold value, the current reduction by an at least LED backlight subregion is
Default safe current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration.
Optionally, being determined whether according to the piece source format of the image to be displayed data or present image display pattern will be each
The current regulation of LED backlight subregion is the step of presetting maximum current：
Judge whether the piece source format of the image to be displayed data is preset format, or judges present image display pattern
Whether it is pre-set image display pattern；
If the format of the image to be displayed data is preset format, if or present image display pattern it is aobvious for pre-set image
Show pattern, is then default maximum current by the current regulation of each LED backlight subregion.
Optionally it is determined that the current duty cycle of an at least LED backlight subregion is accumulative higher than predetermined current duty ratio
The step of duration includes：
First of the current duty cycle of an at least LED backlight subregion described in record higher than predetermined current duty ratio continuously continues
Duration；
When detecting that the current duty cycle of an at least LED backlight subregion becomes less than by being higher than predetermined current duty ratio
Or when equal to predetermined current duty ratio, the current duty cycle of an at least LED backlight subregion described in record is less than or equal to default electricity
Flow the second continuous duration of duty ratio；
According to the described first continuous duration and the second continuous duration, determine described in an at least LED backlight
The current duty cycle of subregion is higher than the accumulative duration of predetermined current duty ratio.
Optionally, according to the described first continuous duration and the second continuous duration, determine described at least one
The current duty cycle of LED backlight subregion be higher than predetermined current duty ratio accumulative duration the step of include：
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, to obtain back-off duration, is used in combination described first
Continuous duration subtracts the back-off duration, with the determination accumulative duration.
Optionally, according to the described first continuous duration and the second continuous duration, determine described at least one
The current duty cycle of LED backlight subregion be higher than predetermined current duty ratio accumulative duration the step of further include：
Default back-off coefficient is obtained, and the default back-off coefficient is multiplied with the described second continuous duration, to obtain
Take back-off duration；
The back-off duration is subtracted with the described first continuous duration, with an at least LED backlight subregion described in determination
Current duty cycle is higher than the accumulative duration of predetermined current duty ratio.
Optionally, the LED excess temperature protection methods further include：
When detecting that the current duty cycle of an at least LED backlight subregion is higher than predetermined current duty ratio, triggering suspend mode is protected
Protect timing；
When the time duration of the Sleep protection timing reaches default time duration, by the electric current of each LED backlight subregion
It is reduced to default safe current.
Optionally, the LED excess temperature protection methods further include：
The power of each LED backlight subregion is calculated, and the power 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 duty cycle of each LED backlight subregion is adjusted.
Optionally, the step of current duty cycle of each LED backlight subregion of adjustment includes：
The ratio of the LED general powers and default power is calculated, and the current flow for obtaining each LED backlight subregion accounts for
Empty ratio；
By the ratio of the LED general powers and default power, the current flow duty ratio phase with each LED backlight subregion
Multiply, to adjust the current duty cycle of each LED backlight subregion.
In addition, to achieve the above object, the present invention also provides a kind of LED overheat protectors terminal, the LED overheat protectors are whole
End includes：Memory, processor and the LED overheat protector journeys that is stored on the memory and can run on the processor
The step of sequence, the LED overheat protectors program realizes LED excess temperature protection methods as described above when being executed by the processor.
The present invention also provides a kind of computer readable storage medium, LED is stored on the computer readable storage medium
Overheat protector program, the LED overheat protectors program realize LED excess temperature protection methods as described above when being executed by processor
Step.
The present invention provides a kind of LED excess temperature protection methods, terminal and computer readable storage medium, for using LED as
The terminal of backlight, when receiving image to be displayed data, and when the electric current of each LED backlight subregion is default maximum current, really
The fixed current duty cycle with the presence or absence of an at least LED backlight subregion is higher than predetermined current duty ratio, if in the presence of an at least LED backlight
The current duty cycle of subregion is higher than predetermined current duty ratio, it is determined that at least the current duty cycle of a LED backlight subregion is higher than pre-
If the accumulative duration of current duty cycle, if cumulative duration reaches predetermined threshold value, by the electricity of corresponding LED backlight subregion
Stream is reduced to safe current, and is kept for a period of time, since the electric current of each LED backlight subregion reaches maximum, then effective enhancing
Image display effect, while being higher than limit value in the current duty cycle of any LED backlight subregion, and when persistently limiting duration,
The electric current of corresponding LED backlight subregion is reduced, and is kept for a period of time, can quickly reduce the temperature of corresponding LED backlight subregion,
It prevents LED from causing to damage since temperature is excessively high, improves the service life of LED, while taking into account image display effect, improve
The service life of LED.
Description of the drawings
Fig. 1 is the terminal structure 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 excess temperature protection methods 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 excess temperature protection methods 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.
The primary solutions of the embodiment of the present invention are：When receiving image to be displayed data, and each LED backlight subregion
When electric current is default maximum current, it is determined whether the current duty cycle that there is an at least LED backlight subregion is accounted for higher than predetermined current
Empty ratio, if the current duty cycle in the presence of an at least LED backlight subregion is higher than predetermined current duty ratio, it is determined that an at least LED is carried on the back
The current duty cycle of light subregion is higher than the accumulative duration of predetermined current duty ratio, if cumulative duration reaches default threshold
The current reduction of corresponding LED backlight subregion is then safe current, and is kept for a period of time by value, quickly reduces 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.
As shown in Figure 1, the terminal structure schematic diagram for the hardware running environment that Fig. 1, which is the embodiment of the present invention, to be related to.
LED overheat protectors terminal of the embodiment of the present invention can be PC and television set, can also be smart mobile phone, tablet electricity
Brain, E-book reader, pocket computer etc. have the packaged type terminal of display function.
As shown in Figure 1, the LED overheat protector terminals 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 between these components
Connection communication.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 mark
Wireline interface, the wireless interface (such as WI-FI interfaces) of standard.Memory 1005 can be high-speed RAM memory, can also be stabilization
Memory (non-volatile memory), such as magnetic disk storage.Memory 1005 optionally can also be independently of preceding
State the storage device of processor 1001.
Optionally, which can also include camera, RF (Radio Frequency, radio frequency) electricity
Road, sensor, voicefrequency circuit, WiFi module etc..
It will be understood by those skilled in the art that LED overheat protectors terminal structure shown in Fig. 1 is not constituted to LED mistakes
The restriction of temperature protection terminal may include either combining certain components or different portions than illustrating more or fewer components
Part is arranged.
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 overheat protector programs.
In LED overheat protector terminals shown in Fig. 1, network interface 1004 is mainly used for connecting background server, and rear
Platform server is into row data communication；User interface 1003 is mainly used for connecting client (user terminal), and data are carried out with client
Communication；And processor 1001 can be used for calling the LED overheat protector programs stored in memory 1005, and execute following step
Suddenly：
It is aobvious according to the piece source format of the image to be displayed data or present image when receiving image to be displayed data
Show pattern, it is determined whether by the current regulation of each LED backlight subregion be default maximum current；
If being default maximum current by the current regulation of each LED backlight subregion, it is determined whether there is an at least LED backlight
The current duty cycle of subregion is higher than predetermined current duty ratio；
If in the presence of an at least LED backlight subregion current duty cycle be higher than predetermined current duty ratio, it is determined that it is described at least
The current duty cycle of one LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio；
If the cumulative duration reaches predetermined threshold value, the current reduction by an at least LED backlight subregion is
Default safe current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
Judge whether the piece source format of the image to be displayed data is preset format, or judges present image display pattern
Whether it is pre-set image display pattern；
If the format of the image to be displayed data is preset format, if or present image display pattern it is aobvious for pre-set image
Show pattern, is then default maximum current by the current regulation of each LED backlight subregion.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
First of the current duty cycle of an at least LED backlight subregion described in record higher than predetermined current duty ratio continuously continues
Duration；
When detecting that the current duty cycle of an at least LED backlight subregion becomes less than by being higher than predetermined current duty ratio
Or when equal to predetermined current duty ratio, the current duty cycle of an at least LED backlight subregion described in record is less than or equal to default electricity
Flow the second continuous duration of duty ratio；
According to the described first continuous duration and the second continuous duration, determine described in an at least LED backlight
The current duty cycle of subregion is higher than the accumulative duration of predetermined current duty ratio.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
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, to obtain back-off duration, is used in combination described first
Continuous duration subtracts the back-off duration, with the determination accumulative duration.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
Default back-off coefficient is obtained, and the default back-off coefficient is multiplied with the described second continuous duration, to obtain
Take back-off duration；
The back-off duration is subtracted with the described first continuous duration, with an at least LED backlight subregion described in determination
Current duty cycle is higher than the accumulative duration of predetermined current duty ratio.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
When detecting that the current duty cycle of an at least LED backlight subregion is higher than predetermined current duty ratio, triggering suspend mode is protected
Protect timing；
When the time duration of the Sleep protection timing reaches default time duration, by the electric current of each LED backlight subregion
It is reduced to default safe current.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
The power of each LED backlight subregion is calculated, and the power 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 duty cycle of each LED backlight subregion is adjusted.
Further, processor 1001 can call the LED overheat protector programs stored in memory 1005, also execute with
Lower step：
The ratio of the LED general powers and default power is calculated, and the current flow for obtaining each LED backlight subregion accounts for
Empty ratio；
By the ratio of the LED general powers and default power, the current flow duty ratio phase with each LED backlight subregion
Multiply, to adjust the current duty cycle of each LED backlight subregion.
Each specific embodiment of the specific embodiment of LED overheat protectors terminal of the present invention and following LED excess temperature protection methods
Essentially identical, therefore not to repeat here.
The present invention provides a kind of LED excess temperature protection methods.
It is the flow diagram of LED excess temperature protection methods first embodiment of the present invention with reference to Fig. 2, Fig. 2.
In the present embodiment, which includes：
Step S101, when receiving image to be displayed data, according to the piece source format of image to be displayed data or currently
Image display mode, it is determined whether by the current regulation of each LED backlight subregion be default maximum current；
In the present embodiment, the LED excess temperature protection methods are optional is applied to television terminal, also optional to apply mobile terminal,
It is explained by taking television terminal as an example below.Wherein, television terminal includes liquid crystal display, and the liquid crystal display uses
LED is as backlight, while liquid crystal display includes multiple LED backlight subregions, and each LED backlight subregion includes at least one
LED, it should be noted that the current duty cycle and electric current of LED backlight subregion are the electric current of each LED in the LED backlight subregion
Duty ratio and electric current；The image display mode of television terminal includes but not limited to mode standard, usts mode, dynamic mode, soft
With pattern, natural mode and film mode, piece source format includes but not limited to HDR (High-Dynamic Range, high dynamic range
Enclose image) format, DVDRip formats, HR-HDTV (High Resolution High Definition Television, it is high
Resolution ratio high definition) format and BD formats (Blu-ray Disc, Blu-ray Disc).
When television terminal receives image to be displayed data, according to the piece source format of the image to be displayed data or currently
Image display mode, it is determined whether by the current regulation of each LED backlight subregion be default maximum current.Specifically, in this implementation
In example, step S101 includes：
Step A1：Judge whether the piece source format of image to be displayed data is preset format, or judges that present image is shown
Whether pattern is pre-set image display pattern；
Step A2：If the format of image to be displayed data is preset format, if or present image display pattern is default figure
Then it is default maximum current by the current regulation of each LED backlight subregion as display pattern.
When television terminal receives image to be displayed data, judge whether the piece source format of image to be displayed data is pre-
If format, if the piece source format of the image to be displayed data is preset format, the current regulation by each LED backlight subregion is
Default maximum current, if the piece source format of the image to be displayed data is not preset format, according to image to be displayed data
Brightness histogram, determine the backlight illumination of each LED backlight subregion.Alternatively, when television terminal receives image to be displayed data
When, judge whether the present image display pattern of television terminal is pre-set image display pattern, if the current figure of television terminal
Picture display pattern is pre-set image display pattern, then is default maximum current by the current regulation of each LED backlight subregion, if electric
The present image display pattern of terminal is regarded not as pre-set image display pattern, then according to the brightness histogram of image to be displayed data
Figure, determines the backlight illumination of each LED backlight subregion.It should be noted that above-mentioned default maximum current, preset format and default figure
As display pattern can be configured by those skilled in the art based on actual conditions, the present embodiment is not especially limited this, excellent
Selection of land, it is 180 milliamperes to preset maximum current, and preset format is HDR format or BD formats, and pre-set image display pattern is beautiful mould
Formula or film mode.
Step S102, if being default maximum current by the current regulation of each LED backlight subregion, it is determined whether exist at least
The current duty cycle of one LED backlight subregion is higher than predetermined current duty ratio；
If the current regulation of each LED backlight subregion is after presetting maximum current, to determine television terminal by television terminal
Each LED backlight subregion in the presence or absence of an at least LED backlight subregion current duty cycle be higher than predetermined current duty ratio, that is,
The brightness histogram of image to be displayed data is obtained, and determines the electric current duty of each LED backlight subregion according to the brightness histogram
Than then determining whether the current duty cycle height of each LED backlight subregion is below predetermined current duty ratio.It should be noted that
Above-mentioned predetermined current duty ratio can be configured by those skilled in the art based on actual conditions, and the present embodiment is not made this specifically
It limits.
Step S103, if the current duty cycle in the presence of an at least LED backlight subregion is higher than predetermined current duty ratio, it is determined that
At least the current duty cycle of a LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio；
If being higher than predetermined current duty in the presence of the current duty cycle of an at least LED backlight subregion in each LED backlight subregion
Than, then television terminal determine an at least LED backlight subregion current duty cycle higher than predetermined current duty ratio it is accumulative continue when
It is long.Specifically, include with reference to Fig. 3, step S103：
First of current duty cycle higher than predetermined current duty ratio of step S1031, a record at least LED backlight subregion connect
Continuous duration；
Step S1032 is become when detecting the current duty cycle of an at least LED backlight subregion by being higher than predetermined current duty ratio
When to be less than or equal to predetermined current duty ratio, the current duty cycle of a record at least LED backlight subregion is less than or equal to default
Second continuous duration of current duty cycle；
Step S1033 determines an at least LED backlight point according to the first continuous duration and the second continuous duration
The current duty cycle in area is higher than the accumulative duration of predetermined current duty ratio.
The current duty cycle that television terminal records an at least LED backlight subregion first is higher than the first of predetermined current duty ratio
Continuous duration, i.e., when the current duty cycle for detecting any LED backlight subregion is higher than predetermined current duty ratio, record is opened
Begin the moment, and works as and detect that the current duty cycle of corresponding LED backlight subregion is become less than or waited by being higher than predetermined current duty ratio
When predetermined current duty ratio, the record end moment, and be based on carving LED backlight corresponding with finish time calculating at the beginning of record
The current duty cycle of subregion is higher than the first continuous duration of predetermined current duty ratio；
Then when detecting that the current duty cycle of an at least LED backlight subregion becomes less than by being higher than predetermined current duty ratio
Or when equal to predetermined current duty ratio, the current duty cycle of a record at least LED backlight subregion is accounted for less than or equal to predetermined current
Second continuous duration of empty ratio, that is, when detecting the current duty cycle of an at least LED backlight subregion by being higher than predetermined current
When duty ratio becomes less than or is equal to predetermined current duty ratio, start time is recorded, and works as and detects corresponding LED backlight subregion
When current duty cycle is changed to above predetermined current duty ratio by being less than or equal to predetermined current duty ratio, the record end moment, and
The current duty cycle that LED backlight subregion corresponding with finish time calculating is carved at the beginning of based on record is less than or equal to predetermined current
Second continuous duration of duty ratio；
Finally according to the first continuous duration and the second continuous duration, the electricity of an at least LED backlight subregion is determined
Flow the accumulative duration that duty ratio is higher than predetermined current duty ratio, i.e., it is continuous according to the first continuous duration and/or second
Duration determines back-off duration, then subtracts the back-off duration with the first continuous duration, you can obtains corresponding LED backlight
The current duty cycle of subregion is higher than the accumulative duration of predetermined current duty ratio.It should be noted that continuous lasting second
When duration is higher than the first continuous duration, the duration difference of the second continuous duration and the first continuous duration is calculated,
And when the duration difference is higher than setting value, the current duty cycle of corresponding LED backlight subregion can be higher than predetermined current duty ratio
Accumulative duration be determined as zero.Wherein, the first continuous duration is less than default accumulative duration, and connects based on first
Continuous duration and the second continuous duration determine and add up duration.
The specific method of determination of accumulative duration includes:
Mode 1：In the present embodiment, step S1033 is specifically included：
Step B1：The mapping table inquired continuous duration and be buckled between coefficient determines and continuously continues with second
The corresponding back-off coefficient of duration；
Step B2：Back-off coefficient is multiplied with the second continuous duration, to obtain back-off duration, is used in combination first continuously to hold
Continuous duration subtracts back-off duration, to determine accumulative duration.
Wherein, if accumulative duration is T, back-off coefficient is k, the first duration is T1 and the second duration is
T2 then adds up duration and is represented by T=T1-T2*k.Television terminal is getting the first continuous duration and the second company
After continuous duration, the mapping table inquired continuous duration and be buckled between coefficient determines and continuously continues with second
Then back-off coefficient is multiplied with the second continuous duration, to obtain back-off duration, is used in combination the by the corresponding back-off coefficient of duration
One continuous duration subtracts back-off duration, to determine accumulative duration.It should be noted that continuous duration and back-off
Mapping table between coefficient is 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, setting the first continuous duration as 8 seconds, the second continuous duration is 2 seconds, and the second continuous duration is corresponding
It is 0.5 to be buckled to coefficient, then it is 8-2*0.5=7 seconds to add up duration, in another example, if the first continuous duration is 12 seconds, the
Two continuous durations are 5 seconds, and the corresponding back-off coefficient of the second continuous duration is 0.4, then it is 12- to add up duration
5*0.4=10 the second.It in the present embodiment, can be with by the way that the mapping table between continuous duration and back-off coefficient is arranged
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.
Mode 2：In the present embodiment, step S1033 further includes specifically：
Step B3：Default back-off coefficient is obtained, and default back-off coefficient is multiplied with the second continuous duration, to obtain
It is buckled to duration；
Step B4：Back-off duration is subtracted with the first continuous duration, to determine that the electric current of an at least LED backlight subregion accounts for
The empty accumulative duration than higher than predetermined current duty ratio.
Television terminal obtains default back-off system after getting the first continuous duration and the second continuous duration
Number, and default back-off coefficient is multiplied with the second continuous duration, to obtain back-off duration, the first continuous duration is used in combination
Back-off duration is subtracted, the current duty cycle to determine an at least LED backlight subregion is accumulative lasting higher than predetermined current duty ratio
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
Ground, 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 pre-
If it is 0.2 to be buckled to coefficient, then it is 10-4*0.2=9.2 seconds to add up duration, in another example, if the first continuous duration is 8
Second, 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, the back-off of accumulative duration can be carried out, effectively when meeting back-off condition
Prevent since determining cumulative duration is inaccurate, and reduce the electric current of corresponding LED backlight subregion, reduce television terminal
Image display effect.
Mode 3：In the present embodiment, during determining accumulative duration, an at least LED backlight point is being detected
When the current duty cycle in area is become less than by being higher than predetermined current duty ratio or is equal to predetermined current duty ratio, corresponding LED is obtained
First Current Temperatures of backlight subarea, and work as and detect that the current duty cycle of corresponding LED backlight subregion is default by being less than or equal to
When current duty cycle is changed to above predetermined current duty ratio, the second Current Temperatures of corresponding LED backlight subregion are obtained, then basis
First Current Temperatures and the second Current Temperatures determine the current duty cycle of corresponding LED backlight subregion higher than predetermined current duty ratio
Accumulative duration, that is, calculate the temperature gap of the first Current Temperatures and the second Current Temperatures, and inquire temperature gap and back-off
Mapping table between coefficient determines the corresponding back-off coefficient of the temperature gap, then that the back-off coefficient and second is continuous
Duration is multiplied, and to obtain back-off duration, the first continuous duration is used in combination to subtract back-off duration, to determine that corresponding LED is carried on the back
The current duty cycle of light subregion is higher than the accumulative duration of predetermined current duty ratio.It should be noted that temperature gap with fall
Mapping table between button coefficient is obtained by those skilled in the art based on test of many times.In the present embodiment, due to
The generation of heat to disperse related with temperature, therefore back-off coefficient can be determined more accurately by temperature gap, can
When meeting back-off condition, the back-off of accumulative duration is carried out, is further effectively prevented due to determining cumulative lasting
Duration is inaccurate, and reduces the electric current of corresponding LED backlight subregion, 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, if cumulative duration reaches predetermined threshold value, the current reduction by an at least LED backlight subregion is
Default safe current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration.
Television terminal determines whether the cumulative duration reaches predetermined threshold value after determining cumulative duration, if
The cumulative duration reaches predetermined threshold value, then is default safe current by the current reduction of an at least LED backlight subregion, and
The electric current of an at least LED backlight subregion is maintained at default safe current in preset duration, that is, passes through the corresponding LED backlight point of reduction
The electric current in area, and kept for a period of time, it can quickly reduce the temperature of corresponding LED backlight subregion.It should be noted that above-mentioned
Predetermined threshold value, default safe current and preset duration can be configured by those skilled in the art based on actual conditions, this implementation
Example is not especially limited this, it is preferable that predetermined threshold value is 15 seconds, default safe current is 130 milliamperes and preset duration is
30 seconds.
In the present embodiment, the present invention is for using LED as the terminal of backlight, when receiving image to be displayed data,
And the electric current of each LED backlight subregion is when presetting maximum current, it is determined whether there is the electric current duty of an at least LED backlight subregion
Than being higher than predetermined current duty ratio, if the current duty cycle in the presence of an at least LED backlight subregion is higher than predetermined current duty ratio,
Determine that the current duty cycle of an at least LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio, if cumulative continue
Duration reaches predetermined threshold value, then is safe current by the current reduction of corresponding LED backlight subregion, and kept for a period of time, due to
The electric current of each LED backlight subregion reaches maximum, then effectively enhances image display effect, while in any LED backlight subregion
Current duty cycle be higher than limit value, and when persistently limiting duration, reduce the electric current of corresponding LED backlight subregion, and kept for one section
Time can quickly reduce the temperature of corresponding LED backlight subregion, prevent LED from causing to damage since temperature is excessively high, improve LED
Service life improve the service life of LED while taking into account image display effect.
Further, with reference to Fig. 4, it is based on above-mentioned first embodiment, it is proposed that the second of LED excess temperature protection methods of the present invention
Embodiment, difference lies in the LED excess temperature protection methods further include with previous embodiment：
Step S105 is touched when detecting that the current duty cycle of an at least LED backlight subregion is higher than predetermined current duty ratio
Send out Sleep protection timing；
Step S106, when the time duration of the Sleep protection timing reaches default time duration, by each LED backlight point
The current reduction in area is 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.
Television terminal is higher than in detecting each LED backlight subregion in the presence of the current duty cycle of an at least LED backlight subregion
When predetermined current duty ratio, Sleep protection timing is triggered, that is, proceeds by the time duration of record Sleep protection timing, and when not
It is that default safety is electric by the current reduction of each LED backlight subregion when the time duration of dormancy protection timing reaches default time duration
Stream, and duration is persistently set, and when the duration that the electric current of each LED backlight subregion is default safe current reaches setting duration
Later, the electric current of each LED backlight subregion is increased to default maximum current.It should be noted that above-mentioned default safe current, pre-
If time duration and default maximum current can be configured by those skilled in the art based on actual conditions, the present embodiment is to this
It is not especially limited, it is preferable that default safe current, default time duration and default maximum current are respectively 130 milliamperes, 2 small
When and 180 milliamperes.
In the present embodiment, the present invention is when meeting the sleep condition of LED backlight subregion, by the electricity of each LED backlight subregion
Stream is reduced to safe current, further improves the service life of LED backlight subregion.
Further, above-mentioned first or second embodiments are based on, it is proposed that the third of LED excess temperature protection methods of the present invention is real
Example is applied, difference lies in the LED excess temperature protection methods further include with previous embodiment：
Step C：The power of each LED backlight subregion is calculated, and the power consumption of each LED backlight subregion is added, it is total to obtain LED
Power；
Step D：LED general powers are compared with default power；
Step E：If LED general powers are higher than default power, the current duty cycle of each LED backlight subregion is adjusted.
It should be noted that the present invention is based on previous embodiments, it is proposed that a kind of specific adjustment mode of current duty cycle,
It is only explained below, it is other to can refer to previous embodiment.
Television terminal calculates the power of each LED backlight subregion, and the power of each LED backlight subregion is added, to obtain LED
General power, and LED general powers are compared with default power, if LED general powers are higher than default power, adjust
The current duty cycle of whole each LED backlight subregion.
Specifically, in the present embodiment, step E includes：
Step E1, calculates the ratio of LED general powers and default power, and obtains the current electricity of each LED backlight subregion
Flow duty ratio；
Step E2, by the ratio of LED general powers and default power, the current flow duty with each LED backlight subregion
Than being multiplied, to adjust the current duty cycle of each LED backlight subregion.
Wherein, if current duty cycle is duty1, to set LED general powers as P, default power be PmaxAnd after adjustment
Current duty cycle is duty2, then the current duty cycle duty2=(P/P after adjustingmax)duty1.Television terminal calculates LED total works
The ratio of rate and default power, and obtain the current flow duty ratio of each LED backlight subregion, then by LED general powers with
The ratio of default power, is multiplied with the current flow duty ratio of each LED backlight subregion, to adjust each LED backlight subregion
Current duty cycle.It should be noted that above-mentioned default power can be set by those skilled in the art based on actual conditions
It sets, the present embodiment is not especially limited this.
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 duty cycle 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 LED overheat protector programs, the LED overheat protectors program realizes following steps when being executed by processor：
It is aobvious according to the piece source format of the image to be displayed data or present image when receiving image to be displayed data
Show pattern, it is determined whether by the current regulation of each LED backlight subregion be default maximum current；
If being default maximum current by the current regulation of each LED backlight subregion, it is determined whether there is an at least LED backlight
The current duty cycle of subregion is higher than predetermined current duty ratio；
If in the presence of an at least LED backlight subregion current duty cycle be higher than predetermined current duty ratio, it is determined that it is described at least
The current duty cycle of one LED backlight subregion is higher than the accumulative duration of predetermined current duty ratio；
If the cumulative duration reaches predetermined threshold value, the current reduction by an at least LED backlight subregion is
Default safe current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
Judge whether the piece source format of the image to be displayed data is preset format, or judges present image display pattern
Whether it is pre-set image display pattern；
If the format of the image to be displayed data is preset format, if or present image display pattern it is aobvious for pre-set image
Show pattern, is then default maximum current by the current regulation of each LED backlight subregion.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
First of the current duty cycle of an at least LED backlight subregion described in record higher than predetermined current duty ratio continuously continues
Duration；
When detecting that the current duty cycle of an at least LED backlight subregion becomes less than by being higher than predetermined current duty ratio
Or when equal to predetermined current duty ratio, the current duty cycle of an at least LED backlight subregion described in record is less than or equal to default electricity
Flow the second continuous duration of duty ratio；
According to the described first continuous duration and the second continuous duration, determine described in an at least LED backlight
The current duty cycle of subregion is higher than the accumulative duration of predetermined current duty ratio.
Further, following steps are also realized when the LED overheat protectors 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, to obtain back-off duration, is used in combination described first
Continuous duration subtracts the back-off duration, with the determination accumulative duration.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
Default back-off coefficient is obtained, and the default back-off coefficient is multiplied with the described second continuous duration, to obtain
Take back-off duration；
The back-off duration is subtracted with the described first continuous duration, with an at least LED backlight subregion described in determination
Current duty cycle is higher than the accumulative duration of predetermined current duty ratio.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
When detecting that the current duty cycle of an at least LED backlight subregion is higher than predetermined current duty ratio, triggering suspend mode is protected
Protect timing；
When the time duration of the Sleep protection timing reaches default time duration, by the electric current of each LED backlight subregion
It is reduced to default safe current.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
The power of each LED backlight subregion is calculated, and the power 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 duty cycle of each LED backlight subregion is adjusted.
Further, following steps are also realized when the LED overheat protectors program is executed by processor：
The ratio of the LED general powers and default power is calculated, and the current flow for obtaining each LED backlight subregion accounts for
Empty ratio；
By the ratio of the LED general powers and default power, the current flow duty ratio phase with each LED backlight subregion
Multiply, to adjust the current duty cycle of each LED backlight subregion.
Each specific implementation of the specific embodiment of computer readable storage medium of the present invention and above-mentioned LED excess temperature protection methods
Example is essentially identical, and 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 excess temperature protection methods, which is characterized in that the LED excess temperature protection methods include the following steps：
When receiving image to be displayed data, mould is shown according to the piece source format of the image to be displayed data or present image
Formula, it is determined whether by the current regulation of each LED backlight subregion be default maximum current；
If being default maximum current by the current regulation of each LED backlight subregion, it is determined whether there is an at least LED backlight subregion
Current duty cycle be higher than predetermined current duty ratio；
If the current duty cycle in the presence of an at least LED backlight subregion is higher than predetermined current duty ratio, it is determined that an at least LED
The current duty cycle of backlight subarea is higher than the accumulative duration of predetermined current duty ratio；
If the cumulative duration reaches predetermined threshold value, the current reduction by an at least LED backlight subregion is default
Safe current, and the electric current of an at least LED backlight subregion is maintained at default safe current in preset duration.
2. LED excess temperature protection methods as described in claim 1, which is characterized in that according to the piece of the image to be displayed data
Source format or present image display pattern determine whether that by the current regulation of each LED backlight subregion be the step of presetting maximum current
Including：
Judge whether the piece source format of the image to be displayed data is preset format, or whether judges present image display pattern
For pre-set image display pattern；
If the format of the image to be displayed data is preset format, if or present image display pattern is that pre-set image shows mould
The current regulation of each LED backlight subregion is then default maximum current by formula.
3. LED excess temperature protection methods as described in claim 1, which is characterized in that an at least LED backlight subregion described in determining
Current duty cycle be higher than predetermined current duty ratio accumulative duration the step of include：
When first of the current duty cycle of an at least LED backlight subregion described in record higher than predetermined current duty ratio continuously continues
It is long；
When detecting that the current duty cycle of an at least LED backlight subregion becomes less than or waited by being higher than predetermined current duty ratio
When predetermined current duty ratio, the current duty cycle of an at least LED backlight subregion described in record is accounted for less than or equal to predetermined current
Second continuous duration of empty ratio；
According to the described first continuous duration and the second continuous duration, determine described in an at least LED backlight subregion
Current duty cycle be higher than predetermined current duty ratio accumulative duration.
4. LED excess temperature protection methods as claimed in claim 3, which is characterized in that according to the described first continuous duration and
The second continuous duration determines the current duty cycle of an at least LED backlight subregion higher than predetermined current duty ratio
Accumulative 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, to obtain back-off duration, is used in combination described first continuous
Duration subtracts the back-off duration, with the determination accumulative duration.
5. LED excess temperature protection methods as claimed in claim 3, which is characterized in that according to the described first continuous duration and
The second continuous duration determines the current duty cycle of an at least LED backlight subregion higher than predetermined current duty ratio
Accumulative duration the step of further include：
Default back-off coefficient is obtained, and the default back-off coefficient is multiplied with the described second continuous duration, to obtain down
Detain duration；
The back-off duration is subtracted with the described first continuous duration, with the electric current of an at least LED backlight subregion described in determination
Duty ratio is higher than the accumulative duration of predetermined current duty ratio.
6. the LED excess temperature protection methods as described in any one of claim 1-5, which is characterized in that the overheat protector sides LED
Method further includes：
When detecting that the current duty cycle of an at least LED backlight subregion is higher than predetermined current duty ratio, Sleep protection meter is triggered
When；
When the time duration of the Sleep protection timing reaches default time duration, by the current reduction of each LED backlight subregion
To preset safe current.
7. the LED excess temperature protection methods as described in any one of claim 1-5, which is characterized in that the overheat protector sides LED
Method further includes：
The power of each LED backlight subregion is calculated, and the power 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 duty cycle of each LED backlight subregion is adjusted.
8. LED excess temperature protection methods as claimed in claim 7, which is characterized in that the electric current of each LED backlight subregion of adjustment
The step of duty ratio includes：
The ratio of the LED general powers and default power is calculated, and obtains the current flow duty of each LED backlight subregion
Than；
By the ratio of the LED general powers and default power, it is multiplied with the current flow duty ratio of each LED backlight subregion,
To adjust the current duty cycle of each LED backlight subregion.
9. a kind of LED overheat protectors terminal, which is characterized in that the LED overheat protectors terminal includes：Memory, processor and
The LED overheat protector programs that is stored on the memory and can run on the processor, the LED overheat protectors program
It is realized such as the step of LED excess temperature protection methods described in any item of the claim 1 to 8 when being executed by the processor.
10. a kind of computer readable storage medium, which is characterized in that be stored with LED mistakes on the computer readable storage medium
Warm protective program is realized when the LED overheat protectors program is executed by processor as described in any item of the claim 1 to 8
The step of LED excess temperature protection methods.
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