CN106782378A - Obtain backlight illumination and its data processing method, device, liquid crystal display - Google Patents
Obtain backlight illumination and its data processing method, device, liquid crystal display Download PDFInfo
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- CN106782378A CN106782378A CN201611234350.XA CN201611234350A CN106782378A CN 106782378 A CN106782378 A CN 106782378A CN 201611234350 A CN201611234350 A CN 201611234350A CN 106782378 A CN106782378 A CN 106782378A
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- backlight
- brightness data
- backlight brightness
- pwm
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
Abstract
The present invention is to obtain backlight illumination and its data processing method, device, liquid crystal display on one kind, is related to display technology field.The method includes：Receive the PWM dim signals that PWM controller sends；Whether the PWM dim signals that judgement is received include default saltus step；If including the setting time after the default saltus step sends to photo-sensing device and reads instruction；Receive the photo-sensing device and read the backlight brightness data that instruction is obtained according to described.The embodiment of the present invention realizes the purpose of the stability for improving the backlight brightness data for obtaining.
Description
Technical field
The present invention relates to display technology field, more particularly to it is a kind of obtain backlight illumination and its data processing method, device,
Liquid crystal display.
Background technology
The requirement of existing display device more and more accurately shows picture material, and realize the picture material of display device
Accurate display need to first ensure the brightness stability of display device.
As shown in figure 1, existing display device includes：Display module 101, backlight module 102, backlight drive device 103,
The treatment of PWM (Pulse Width Modulation, pulse width modulation) controller 104, photo-sensing device 105 and brightness data
Device 106.Wherein, display module 101, for receiving simultaneously display image.Backlight module 102 is used to provide the back of the body for display module 101
Light source, so that display module 101 shows image.The PWM that backlight drive device 103 is used to be provided according to PWM controller 104 is adjusted
Optical signal provides driving power supply for backlight module, is shone for display module 101 provides backlight so that backlight module 102 emits beam
It is bright.Brightness data processor 106 is used for the brightness of the backlight that backlight module 102 is provided obtained according to photo-sensing device 105
Data, the dutycycle of the PWM dim signals provided PWM controller 104 is adjusted, so that backlight module 102 is display group
Part 101 provides the backlight of brightness stability.
At present, display device realizes that the used mode of the back light source brightness stabilization of backlight module 102 is：At brightness data
Reason device 106 is sent to photo-sensing device 105 and reads instruction, and photo-sensing device 105 is received and reads instruction, and reads backlight module
The brightness data of 102 backlights for providing, and send to brightness data processor 106.Using aforesaid way, brightness data treatment
Device 106 obtains the brightness data of certain number of times, calculates mean flow rate data, and the mean flow rate data that will be calculated are used as the back of the body
The present intensity data of light module 102, are compared with object brightness data, and PWM controller 104 is provided according to comparative result
The dutycycle of PWM dim signals be adjusted, so that the back light source brightness data of backlight module 102 are object brightness data.
But, it is random transmission that brightness data processor 106 sends to photo-sensing device 105 and reads instruction in the prior art
Be random transmission.So each brightness data processor 106 sends the transmission time for reading instruction to photo-sensing device 105
It is not fully identical, the sampling time point of the brightness data of each photo-sensing device 105 will be caused to change, as shown in Figure 2.
Although the sample integration time T of the brightness data of photo-sensing device 105S0And TS1It is equal, but each sample integration time correspondence
Time of on and off of backlight module 102 differ, so as to cause in sample integration time TS0And TS1It is interior, photo-sensing device
105 the having differences property of brightness data for reading.So, brightness data processor 106 obtains the brightness data of certain number of times
The otherness of presence is larger, causes the present intensity data of the backlight module 102 for calculating inaccurate, if present intensity data with
When object brightness data are different, the dutycycle of the PWM dim signals that brightness data processor 106 is provided PWM controller 104
Adjustment is also inaccurate, and causing the back light source brightness of backlight module 102 becomes more unstable.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of acquisition backlight illumination and its data processing side
Method, device, liquid crystal display.
A kind of first aspect according to embodiments of the present invention, there is provided method of acquisition backlight illumination, is applied to be built-in with light
In the liquid crystal display of senser element, methods described includes：Receive the PWM light modulations that pulse width modulation (PWM) controller sends
Signal；Whether the PWM dim signals that judgement is received include default saltus step；If including after the default saltus step
Setting time to photo-sensing device send read instruction；Receive the photo-sensing device and read the back of the body that instruction is obtained according to described
Luminance data.
A kind of second aspect according to embodiments of the present invention, there is provided backlight brightness data processing method, including obtain at least
One backlight brightness data, wherein, obtaining any one backlight brightness data includes：By the acquisition backlight described in above-described embodiment
The method of brightness, obtains described any one backlight brightness data；According at least one backlight brightness data, determine that PWM is adjusted
The corresponding present intensity data under current duty cycle of optical signal.
A kind of third aspect according to embodiments of the present invention, there is provided device of acquisition backlight illumination, including：Processor, deposit
Reservoir and communication interface, the processor, the memory are connected with the communication interface communication bus；The communication interface,
For sending and receiving signal；The memory, for store program codes；The processor, for reading the memory
The program code of middle storage, and the method for performing acquisition backlight illumination described in the embodiment of above-mentioned first aspect.
A kind of fourth aspect according to embodiments of the present invention, there is provided backlight brightness data processing unit, including：Processor,
Memory and communication interface, the processor, the memory are connected with the communication interface communication bus；The communication connects
Mouthful, for sending and receiving signal；The memory, for store program codes；The processor, for reading the storage
The program code stored in device, and perform the processing method of backlight illumination described in the embodiment of above-mentioned second aspect.
A kind of 5th aspect according to embodiments of the present invention, there is provided liquid crystal display, including：Display module, is described
Display module provides the backlight module of backlight, backlight drive device, PWM controller, photo-sensing device and processor；Wherein,
The backlight included in the processor described in the device and above-described embodiment that obtain backlight illumination described in above-described embodiment is bright
Degrees of data processing unit；The backlight module is connected with the backlight drive device；The PWM controller part drives with the backlight
Dynamic device connection；The light sensitive device is arranged at the backlight module, and the device with the acquisition backlight illumination is connected；It is described
The device for obtaining backlight illumination is connected with the backlight brightness data processing unit；The backlight brightness data processing unit and obtain
The device for taking backlight illumination is connected with the PWM controller part.
The technical scheme that embodiments of the invention are provided can include the following benefits：Receive the PWM of PWM controller hair
Whether dim signal, the PWM dim signals that judgement is received include default saltus step；If including setting after default saltus step
Fix time and think that photo-sensing device sends reading instruction；Photo-sensing device is received according to the backlight brightness data for reading instruction acquisition.
So, the device of backlight illumination is obtained when backlight brightness data is obtained every time, need to be dimmed in the PWM for judging to receive
After signal includes default saltus step, sent to photo-sensing device in setting time and read instruction, rather than random transmission so that send
Reading instruction has basis of time, and the time for as obtaining the device transmission reading instruction of backlight illumination is more stable, passes light
The time that inductor component receives reading instruction is more stable, and then the backlight brightness data that photo-sensing device is obtained is more stable,
So as to improve the stability of the back light source brightness of display device.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows and meets implementation of the invention
Example, and be used to explain principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation of display device in the prior art；
Fig. 2 is the sampling time schematic diagram of the brightness data of photo-sensing device in the prior art；
Fig. 3 is a kind of schematic flow sheet of method for obtaining backlight illumination provided in an embodiment of the present invention；
Fig. 4 is the schematic flow sheet of another backlight brightness data processing method provided in an embodiment of the present invention；
Fig. 5 is the schematic flow sheet of another backlight brightness data processing method provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of device for obtaining backlight illumination provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of backlight brightness data processing unit provided in an embodiment of the present invention；
Fig. 8 is a kind of structural representation of liquid crystal display provided in an embodiment of the present invention.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Fig. 3 is a kind of flow chart of the method for the acquisition backlight illumination according to an exemplary embodiment.The method should
For being built-in with the liquid crystal display of photo-sensing device.As shown in figure 3, the method includes：
Step 201, the PWM dim signals for receiving the transmission of pulse width modulation (PWM) controller.
Specifically, PWM (Pulse Width Modulation, pulse width modulation) controller can dim PWM believing
Number periodically send to the device for obtaining backlight illumination, so that the device for obtaining backlight illumination can know current PWM light modulation
The dutycycle of signal.Obtaining the device of backlight illumination can receive the PWM dim signals of PWM controller transmission.
Whether the PWM dim signals that step 202, judgement are received include default saltus step.
Specifically, because the brightness that backlight module provides backlight is determined by the dutycycle of PWM dim signals.Therefore, exist
, it is necessary to adjust the current duty cycle of PWM dim signals when brightness to the backlight of backlight module is adjusted.And PWM is dimmed
The adjustment of the dutycycle of signal needs the brightness data according to the backlight of backlight module offer to determine how adjustment.In order to protect
The stability of the brightness of the backlight that card backlight module is provided is, it is necessary to be periodically detected the brightness of the backlight of backlight module offer
Data, when its brightness data is not object brightness data, illustrate backlight module provide backlight brightness change, it is necessary to
The current duty cycle of PWM dim signals is adjusted, so that the brightness data of the backlight for providing backlight module is that target is bright again
Degrees of data, to reach the purpose of the back light source brightness stabilization of backlight module offer.For these reasons, the dress of backlight illumination is obtained
Put the brightness data for needing to obtain the backlight that backlight module is provided.
And in the prior art, the transmission time for sending reading instruction to photo-sensing device is random, without regularity.
The time that the reading for so causing photo-sensing device to receive is instructed is unstable, and the backlight brightness data of its collection is that PWM dims week
Backlight brightness data in the different time of phase.In embodiments of the present invention, it is regular to photo-sensing device in order to realize
Send and read instruction, it is necessary to set the time for sending and reading instruction.The time of the reading instruction of setting needs a fiducial time
Come, as send the beginning timing time of the time for reading instruction.Because the device for obtaining backlight illumination needs repeatedly to be passed to light
Inductor component send read instruction, therefore fiducial time last time need every time to photo-sensing device send read instruction all same,
The device that backlight illumination could be realized obtaining is stable to the time that photo-sensing device sends reading instruction, rather than random hair
The purpose sent.Because the device for obtaining backlight illumination can be periodically received PWM dim signals, therefore can be connect detecting
The time of the default saltus step of PWM dim signals protection of receipts is used as fiducial time.
Now, obtain backlight illumination device receive PWM controller transmission PWM dim signals after, it is necessary to detect
Whether PWM dim signals include default saltus step.
Further, default saltus step includes：The rising edge saltus step of signal and/or the trailing edge saltus step of signal.
Now, judge whether the PWM dim signals for receiving include that default saltus step includes：
The trailing edge of rising edge saltus step and/or signal that whether the PWM dim signals that detection is received include signal is jumped
Become.
As, when default saltus step includes rising edge saltus step, the device for obtaining backlight illumination is receiving PWM dim signals
Afterwards, detect whether this PWM dim signal has rising edge saltus step.When PWM dim signals have rising edge saltus step, it is determined that go out
PWM dim signals include default saltus step.When default saltus step includes trailing edge saltus step, the device for obtaining backlight illumination is being received
After PWM dim signals, detect whether this PWM dim signal has trailing edge saltus step.There is trailing edge saltus step in PWM dim signals
When, it is determined that going out PWM dim signals includes default saltus step.When default saltus step includes rising edge saltus step and trailing edge saltus step, obtain
The device of backlight illumination is taken after PWM dim signals are received, detect this PWM dim signal whether have rising edge saltus step and under
Drop is along saltus step.When PWM dim signals have rising edge saltus step and trailing edge saltus step, it is determined that going out PWM dim signals is included in advance
If saltus step.
It should be noted that whether the device of acquisition backlight illumination is when PWM dim signals are judged comprising default saltus step, can
To be whether the PWM dim signals that detection is received have predeterminated voltage to change, as detect whether PWM dim signals have rising edge
The corresponding voltage change of saltus step and/or the corresponding voltage change of trailing edge saltus step.Certainly can also be other modes to judge PWM
Whether dim signal is comprising default saltus step, and the embodiment of the present invention is without limitation.
Exemplary, it is assumed that default saltus step is the rising edge saltus step and trailing edge saltus step of signal.Obtain the dress of backlight illumination
Put receive PWM controller transmission PWM dim signals after, detection PWM dim signals in whether contain rising edge saltus step and
Trailing edge saltus step, as detects whether PWM dim signals are a dim signal for complete cycle.If detecting that PWM is dimmed
Signal contains rising edge saltus step and trailing edge saltus step, then can determine that PWM dim signals are a light modulation for complete cycle
Signal.
If step 203, including the setting time after default saltus step sends to photo-sensing device and reads instruction.
Specifically, obtaining the device of backlight illumination after determining that PWM dim signals include default saltus step, will can detect
Going out PWM dim signals includes the time of default saltus step as fiducial time, and starts timing when setting is reached with fiducial time
Between after to photo-sensing device send read instruction.As, the device for obtaining backlight illumination is detecting that it is pre- that PWM dim signals include
If after saltus step, being sent to photo-sensing device after the setting time of interval and reading instruction.
Further, it can be identical that each backlight brightness data sends and reads the setting time for instructing.That is,
It is after the PWM dim signals for determining reception include default saltus step, to reach and set when backlight brightness data is obtained every time
Sent to photo-sensing device when fixing time and read instruction.So, the device of backlight illumination is obtained every time to photo-sensing device
The time for sending reading instruction is the identical time period in PWM dimming cycles so that photo-sensing device gathers backlight illumination number
According to time period be the fixed time period in PWM dimming cycles, make the backlight brightness data stability that photo-sensing device is gathered compared with
It is high.
As above described in example, obtain backlight illumination device determine PWM dim signals include rising edge saltus step and under
After drop is along saltus step, timing can be started to determine that PWM dim signals include time of rising edge saltus step and trailing edge saltus step,
Sent to photo-sensing device after setting time is reached and read instruction.
Step 204, reception photo-sensing device are according to the backlight brightness data for reading instruction acquisition.
Specifically, photo-sensing device is after reading instruction is received, the bright of the backlight that backlight module is provided can be gathered
Degrees of data, as backlight brightness data, the backlight brightness data of acquisition is sent to the device for obtaining backlight illumination.Backlight illumination
Device receive photo-sensing device according to read instruction obtain backlight brightness data.
As above described in example, photo-sensing device can gather the backlight of backlight module offer after reading instruction is received
Brightness data, as backlight brightness data sends to the device for obtaining backlight illumination the backlight brightness data of acquisition.Obtain
The device of backlight illumination can get backlight brightness data.
So, the device of backlight illumination is obtained when backlight brightness data is obtained every time, need to judge to receive
PWM dim signals include default saltus step after, sent to photo-sensing device in setting time and read instruction, rather than random hair
Send so that sending to read to instruct has basis of time, and the device of as acquisition backlight illumination sends and reads the time for instructing more
Stabilization, make photo-sensing device receive read instruction time it is more stable, and then photo-sensing device acquisition backlight illumination number
According to more stable, so as to improve the stability of the back light source brightness of display device.
As shown in figure 4, a kind of backlight brightness data processing method is the embodiment of the invention provides, including：
Step 301, at least one backlight brightness data of acquisition.
Wherein, obtaining any one backlight brightness data includes：By the side of the acquisition backlight illumination described in above-described embodiment
Method, obtains this any one backlight brightness data.
Specifically, backlight brightness data processing unit needs to obtain at least one backlight brightness data, each back of the body is being obtained
During luminance data, backlight brightness data can be obtained by above-mentioned steps 201-204.
Further, when at least one backlight brightness data is obtained, the setting time in above-mentioned steps 202 can phase
Together, it is also possible to differ.
When setting time is differed, setting time includes：Setting time is according to the backlight brightness data for having received
Number, using formulaDetermine.
Wherein, TPWMIt it is the cycle of PWM dim signals, x is the number of at least one backlight brightness data, and i has been received
The number of backlight brightness data.
As, setting time is that backlight brightness data processing unit is being sent before reading instruction, according to received
The number of backlight brightness data, using formulaCalculate.So backlight brightness data processing unit is sent out every time
The transmission time of the corresponding different reading instruction of reading instruction sent, so that photo-sensing device can read backlight in different time
Brightness data.By formulaThe cycle of PWM dim signals can be divided into x time period, backlight brightness data
Processing unit obtains backlight brightness data, as backlight brightness data within the different time period in the cycle of PWM dim signals
The cycle of PWM dim signals was divided into at least one time period by processing unit, and backlight brightness data processing unit is at each
Between a backlight brightness data is obtained in section, and then get at least one backlight brightness data.
Or, it is contemplated that PWM controller is provided between pwm signal and backlight module offer backlight delay time, sets
Time includes：Setting time is the number according to received backlight brightness data, using formulaIt is determined that
's.
Wherein, Δ TcRepresent that PWM controller provides the delay time that pwm signal and backlight module are provided between backlight.
So, backlight brightness data processing unit can detect reception when q-th backlight brightness data is obtained
When the PWM dim signals of PWM controller transmission include default saltus step, q-th corresponding reading of backlight brightness data instructs transmission
Time is setting timeOr,So backlight brightness data processing unit can be true
Making PWM dim signals includes interval time after default saltus stepOr, interval time
Photo-sensing device is sent and reads instruction, and now photo-sensing device can be sent to the back of the body backlight brightness data of acquisition
Bright U Degree U can get q-th backlight brightness data according to processing unit, backlight brightness data processing unit.Wherein, q
Any one backlight brightness data of the backlight brightness data of individual backlight brightness data at least one.
Step 302, according at least one backlight brightness data, determine that PWM dim signals are corresponding under current duty cycle
Present intensity data.
Specifically, after backlight brightness data processing unit obtains at least one backlight brightness data, can be according to acquisition
To backlight brightness data quantity present intensity data corresponding under current duty cycle to determine PWM dim signals.I.e.
For, when a backlight brightness data is got, this backlight illumination that backlight brightness data processing unit will can get
Data are used as the corresponding present intensity data under current duty cycle of PWM dim signals.
When at least two backlight brightness datas is got, backlight brightness data processing unit can calculate at least two back ofs the body
The average value of luminance data, obtains the corresponding present intensity data of current duty cycle of PWM dim signals.As, backlight is bright
At least two backlight brightness datas are carried out degrees of data processing unit the calculating of average value, and the average value that will be calculated is used as PWM
The corresponding present intensity data of current duty cycle of dim signal.
Further, in order to increase the accurate of the corresponding present intensity data under current duty cycle of PWM dim signals
Property, backlight brightness data processing unit can increase the number of times for obtaining backlight brightness data, as bright using at least one backlight
Degrees of data obtains the first brightness data, and then it is right that PWM dim signals institute under current duty cycle is obtained by the first brightness data
The present intensity data answered.
Now, according at least one backlight brightness data, determine that PWM dim signals are corresponding under current duty cycle and work as
Preceding brightness data, including：
According at least one backlight brightness data, the first brightness data is obtained.The first brightness data that judgement has been obtained
Whether number reaches predetermined number.If the number not up to predetermined number of the first brightness data for having obtained, re-executes
Obtain at least one backlight brightness data.If the number of the first brightness data for having obtained reaches predetermined number, according to
The first brightness data for obtaining, determines the corresponding present intensity data under current duty cycle of PWM dim signals.
That is, backlight brightness data processing unit is after at least one backlight brightness data is got, can calculate
The average value of all or part of data at least one backlight brightness data, using this average value as a first brightness number
According to.After the first brightness data is obtained, can check so that whether the number of the first brightness data for obtaining reaches predetermined number, such as
Fruit is not reaching to, then illustrate that backlight brightness data processing unit needs to continue to obtain the first brightness data, and due to the first brightness
Data are obtained according at least one backlight brightness data, therefore need to first reacquire at least one backlight brightness data, this
When need to re-execute step 301, and then according at least one backlight brightness data for reacquiring, reacquire the first brightness number
According to until the number of the first brightness data for having obtained reaches predetermined number.Reached in the number of the first brightness data for having obtained
During to predetermined number, it is possible to use the first brightness data of predetermined number, determine that PWM dim signals institute under current duty cycle is right
The present intensity data answered.
When predetermined number is 1, backlight brightness data processing unit only obtains first brightness data, now may be used
Using this first brightness data that will get as the corresponding present intensity number under current duty cycle of PWM dim signals
According to.
When predetermined number is the integer more than 1, backlight brightness data processing unit can calculate predetermined number first
The average value of brightness data, obtains the corresponding present intensity data of current duty cycle of PWM dim signals.As, backlight illumination
The brightness data of predetermined number first is carried out data processing equipment the calculating of average value, and the average value that will be calculated is adjusted as PWM
The corresponding present intensity data of current duty cycle of optical signal.
Further, due to that will there is time delay during reading instruction transmission to photo-sensing device, read instruct every time
Send incomplete same to the time delay of photo-sensing device, cause photo-sensing device to receive the time for reading instruction every time in the presence of poor
It is different, and then photo-sensing device can be made to gather the time difference of the brightness data of backlight.But, in liquid crystal display, no
Difference between the maximum of the brightness data of the backlight in same PWM dimming cycles is smaller, therefore, in order to improve what is determined
The accuracy of the corresponding present intensity data under current duty cycle of PWM dim signals, can every time obtain the first brightness
During data, obtain at least one backlight brightness data in select the larger backlight brightness data of numerical value, using numerical value compared with
Big backlight brightness data calculates the first brightness data, improves the accuracy of the first brightness data, and then can improve PWM tune
The accuracy of the corresponding present intensity data under current duty cycle of optical signal.
Now, according at least one backlight brightness data, obtaining the first brightness data includes：In at least one backlight illumination
In data, n backlight brightness data is chosen.The n average value of backlight brightness data is calculated, the first brightness data is obtained.
Wherein, any one backlight brightness data in n backlight brightness data is not less than in k backlight brightness data
Any one backlight brightness data.K backlight brightness data be at least one backlight brightness data except n backlight brightness data it
Outer backlight brightness data.N is and the no more than integer of at least one backlight brightness data total number more than 0, k be more than or
Integer equal to 0.
Backlight brightness data processing unit can obtained every time in order to further increase the stability of the first brightness data
At least one backlight brightness data in select the n big backlight brightness data of numerical value, by the flat of this n backlight brightness data
Average, as the first brightness data.
Further, backlight brightness data processing unit chooses n backlight illumination from least one backlight brightness data
The specific method of data can be, backlight brightness data processing unit is near according to the numerical value of at least one backlight brightness data
Order of few backlight brightness data according to its numerical value from big to small is ranked up, so as at least one backlight after sequence
The big backlight brightness data of preceding n numerical value is selected in brightness data.
It should be noted that backlight brightness data processing unit can also by other means at least one backlight illumination
N backlight brightness data is selected in data, the embodiment of the present invention is not restricted to this.
So, n maximum backlight brightness data that every time can be in x backlight brightness data asks for first
Brightness data so that the gap calculated every time between the backlight brightness data that the first brightness data is used is smaller, can improve really
The accuracy of the corresponding present intensity data of current duty cycle of fixed PWM dim signals.
So, backlight brightness data processing unit need to judged to receive when backlight brightness data is obtained every time
After the PWM dim signals for arriving include default saltus step, sent to photo-sensing device in setting time and read instruction, rather than random hair
Send so that sending to read to instruct has basis of time, and the device of as acquisition backlight illumination sends and reads the time for instructing more
Stabilization, make photo-sensing device receive read instruction time it is more stable, and then photo-sensing device acquisition backlight illumination number
According to more stable, and then make the corresponding present intensity data under current duty cycle of the PWM dim signals of determination more accurate, carry
The stability of the back light source brightness of display device high.
As shown in figure 5, a kind of backlight brightness data processing method is the embodiment of the invention provides, including：
Step 401, the first to x-th backlight brightness data of acquisition.
Wherein, q-th backlight brightness data is obtained, including：Receive the PWM dim signals that PWM controller sends；Judgement connects
Whether the PWM dim signals for receiving include default saltus step；If including in the setting time after default saltus step to light sensing
Device sends and reads instruction；Photo-sensing device is received according to the backlight brightness data for reading instruction acquisition.The value of q is in 1 to x
Any one value, x is the integer more than or equal to 1.
Specifically, referring to step 301, will not be repeated here.
Exemplary, it is assumed that the reading instruction for obtaining the corresponding setting of backlight brightness data every time is differed, and is read
Instruction fetch sends the number that the time is the backlight brightness data that basis has been received, using formulaSetting.If backlight
Brightness data processing unit need to obtain 20 backlight brightness datas.Now, backlight brightness data processing unit is bright in 20 backlights
Degrees of data, can be obtained by following step.When the 1st backlight brightness data is obtained, backlight brightness data processing unit
The PWM dim signals that PWM controls send are received, now backlight brightness data processing unit needs first to judge that PWM dim signals are
No is a PWM dim signal for complete cycle, as detects whether PWM dim signals have rising edge and trailing edge, if PWM is adjusted
Optical signal has rising edge and trailing edge, then can determine that PWM dim signals are a PWM dim signal for complete cycle.Due to
Backlight brightness data processing unit does not receive backlight brightness data, and as received backlight brightness data is 0, then lead to
Cross formulaCan determine that the reading transmission instruction time is 0, as backlight brightness data processing unit determines that PWM is adjusted
After optical signal is a PWM dim signal for complete cycle, is sent to photo-sensing device read instruction immediately.Photo-sensing device connects
After receiving reading instruction, the brightness data of the backlight of backlight module offer can be read, as read backlight brightness data, and
The backlight brightness data of reading is sent to backlight brightness data processing unit.Backlight brightness data processing unit receives light sensing
The backlight brightness data that device is obtained.Now, backlight brightness data processing unit can get the 1st backlight brightness data.
Backlight brightness data processing unit can update received backlight illumination number after the 1st backlight brightness data is got
According to number, the number of received backlight brightness data is as updated to 1, and the received backlight that will be updated is bright
The number 1 of degrees of data is compared with the backlight brightness data number 20 that need to be obtained.Judge received backlight illumination number
According to number do not arrive the backlight brightness data number 20 that need to obtain, then backlight brightness data processing unit continues to obtain backlight illumination
Data.
As, backlight brightness data processing unit receives the PWM dim signals that PWM controls send, and continues to judge that PWM is adjusted
Whether optical signal is a PWM dim signal for complete cycle, as detects whether PWM dim signals have rising edge and decline
Edge, if PWM dim signals have rising edge and trailing edge, can determine that PWM dim signals are a PWM light modulation for complete cycle
Signal.Backlight brightness data processing unit can be according to received backlight brightness data number 1, by formula
Can determine that the reading transmission instruction time isAnd determining that PWM dim signals have rising edge and trailing edge
Afterwards, in interval timeSent to photo-sensing device afterwards and read instruction, as stand-by periodBackward light is passed
Inductor component sends and reads instruction.Receive the backlight brightness data that photo-sensing device is obtained according to above-mentioned reading instruction.Now, backlight
Brightness data processing unit can get the 2nd backlight brightness data.Backlight brightness data processing unit is getting the 2nd
After backlight brightness data, the number of received backlight brightness data can be updated, as by received backlight illumination
The number of data is updated to 2, and the received backlight brightness data that will be updated number 2 and the backlight illumination number that need to be obtained
It is compared according to number 20, judges that the number 2 of received backlight brightness data is not up to predetermined number 20, backlight illumination
Data processing equipment continues to obtain backlight brightness data, until getting 20 backlight brightness datas.
Step 402, according to x backlight brightness data, determine that PWM dim signals are corresponding current under current duty cycle
Brightness data.
Specifically, may be referred to above-mentioned steps 302, will not be repeated here.
As above described in example, backlight brightness data processing unit, can be by 20 after 20 backlight brightness datas are obtained
Backlight brightness data, from being ranked up to small order greatly, chooses the first two backlight brightness data, as from 20 according to numerical value
In backlight brightness data, 2 numerical value of backlight brightness data for selecting are not less than other 18 numbers of backlight brightness data
Value.2 backlight brightness datas chosen are carried out the calculating of average value, and then the average value that will be calculated is used as the 1st first
Brightness data.Whether the number of the first brightness data that judgement has been obtained reaches predetermined number, it is assumed that predetermined number is 10, now
Because the number of the first brightness data to obtain is 1, not up to predetermined number 10 is, it is necessary to continue to obtain the first brightness data.
Now, backlight brightness data processing unit needs to re-execute above-mentioned steps 401, reacquires 20 backlight brightness datas, enters
And the 2nd the first brightness data is obtained according to 20 backlight brightness datas for reacquiring, according to the method described above until getting
10 the first brightness datas.After 10 the first brightness datas are obtained, 10 average values of the first brightness data can be calculated,
Using this average value as the corresponding present intensity data under current duty cycle of PWM dim signals.
Step 403, determine whether present intensity data are equal with object brightness data.
Specifically, when display device dispatches from the factory, the brightness of its display module pre-sets, and so, backlight module
The brightness data of the backlight of offer is also pre-set as object brightness data.In order that the display module of display device
Brightness stability is in the default brightness for setting, it is necessary to the brightness data of the backlight of backlight module offer is object brightness data.The back of the body
Luminance data processing unit, can after the corresponding present intensity data under current duty cycle of PWM dim signals are calculated
Be compared with object brightness data with by present intensity data, judge present intensity data whether with object brightness data phase
Deng.
Further, when judging that present intensity data are equal with object brightness data, illustrate that current backlight module is carried
The back light source brightness stabilization of confession, the dutycycle without adjusting PWM dim signals no longer performs following step.And judging to work as
When preceding brightness data is unequal with object brightness data, illustrate that the back light source brightness that current backlight module is provided is unstable, need to adjust
The dutycycle of whole PWM dim signals, performs following step.
As above described in example, after backlight brightness data processing unit calculates present intensity data, by present intensity data with
Object brightness data are compared, it is assumed that present intensity data are unequal with object brightness data, then explanation needs adjustment PWM to adjust
The current duty cycle of optical signal, performs following step.
It should be noted that object brightness data are to obtain in advance.Its specific acquisition process is：Dispatched from the factory in display device
Before, with the help of outside illumination testing equipment, by adjusting the dutycycle of PWM dim signals, by the display group of display device
The brightness adjustment of part is B0.Backlight brightness data processing unit determines working as PWM dim signals by above-mentioned steps 401-402
Corresponding brightness data under preceding dutycycle, the brightness adjustment for as determining the display module of display device is B0When, it is corresponding
Brightness data, determines that brightness data is defined as object brightness data.
If step 404, present intensity data and object brightness data are unequal, according to present intensity data and target
Brightness data, adjusts the current duty cycle of PWM dim signals.
Specifically, when backlight brightness data processing unit determines that present intensity data are unequal with object brightness data,
The brightness for illustrating the backlight that current backlight module is provided is not predetermined luminance, it is necessary to adjust the backlight of backlight module offer
Brightness.Now, backlight brightness data processing unit can be adjusted according to the relation between present intensity data and object brightness data
The current duty cycle of PWM dim signals.
As, it is bright according to present intensity data and target if present intensity data are unequal with object brightness data
Degrees of data, the current duty cycle for adjusting PWM dim signals includes：
If present intensity data are less than object brightness data, increase the dutycycle of PWM dim signals.
If present intensity data are more than object brightness data, reduce the dutycycle of PWM dim signals.
That is, backlight brightness data processing unit is when determining that present intensity data are less than object brightness data,
The too dark brightness of the backlight that current backlight module is provided is illustrated, it is necessary to improve the brightness of the backlight of backlight module offer, this
When can increase the current duty cycle of PWM dim signals, to increase the time of backlight module energization, and then improve backlight module
The brightness of the backlight of offer.
When determining that present intensity data are more than object brightness data, the backlight that current backlight module is provided is illustrated
Brightness is excessively bright, it is necessary to reduce the brightness of the backlight of backlight module offer, can now reduce the current of P PWM dim signals and account for
Sky ratio, to reduce the time of backlight module energization, and then reduces the brightness of the backlight that backlight module is provided.
Further, backlight brightness data processing unit carry out PWM dim signals dutycycle adjust when, can with compared with
Small step-length adjusts the dutycycle of PWM dim signals, to avoid backlight module from being carried according to the dutycycle of the PWM dim signals of adjustment
The brightness change of the backlight of confession is too fast, and display device eyes are uncomfortable when causing user to watch.
As above described in example, it is assumed that backlight brightness data processing unit determines that present intensity data are less than object brightness number
According to backlight brightness data processing unit can increase the current duty cycle of PWM dim signals, to increase backlight module energization
Time, and then improve the brightness of the backlight that backlight module is provided.
It should be noted that due to when display device is just started shooting, because temperature etc. influences, in the PWM of PWM controller output
When the dutycycle of dim signal is default dutycycle, the brightness data of the backlight that backlight module is provided is less than object brightness number
According to the dutycycle of PWM dim signals can now being increased by above-mentioned steps 401-404, to realize the brightness of display device
Stablize as early as possible to default brightness.
It should be noted that if display device is used for a long time, backlight module appearance is aging, causes the backlight for providing
Brightness be not predetermined luminance, can by step 401-404 adjust PWM dim signals dutycycle so that display device
Brightness stability is in default brightness.
So, backlight brightness data processing unit, when backlight brightness data is obtained every time, is to judge to connect
After the PWM dim signals for receiving include default saltus step, the setting time after default saltus step sends reading and refers to photo-sensing device
Order, rather than random transmission, when setting time is identical, the reading for as sending reading instruction to photo-sensing device every time is instructed
The transmission time is the set time, then the backlight brightness data that photo-sensing device reads every time is the section at the same time of dimming cycle
Interior backlight brightness data, and then make the corresponding present intensity data under current duty cycle of the PWM dim signals of determination more
Accurately, improve the stability of the back light source brightness of display device.
When the corresponding setting time of acquisition backlight brightness data is different every time, and setting time is that basis has been received by
Backlight brightness data number determine.As photo-sensing device reads the backlight brightness data under different time sections, at x
Order in backlight brightness data according to numerical value from big to small chooses the backlight brightness data of first n, and then bright according to n backlight
Degrees of data the first brightness data of acquisition, and the first brightness data of predetermined number can be got using the above method, according to pre-
If individual several first brightness datas obtain the corresponding present intensity data under current duty cycle of PWM dim signals.Due to meter
The gap calculated between n backlight brightness data between any one first brightness data is smaller so that the first brightness data is more accurate,
And then cause that the corresponding present intensity data under current duty cycle of the PWM dim signals for determining are more accurate, in present intensity
When data are unequal with object brightness data, the accuracy of the current duty cycle of adjustment PWM dim signals is improve, realized logical
Cross real-time adjustment PWM dim signals current duty cycle cause backlight module brightness stability purpose.
On the device in above-described embodiment, wherein modules perform the concrete mode of operation in relevant the method
Embodiment in be described in detail, explanation will be not set forth in detail herein.
It is shown in Figure 6, it is a kind of structural representation of device for obtaining backlight illumination provided in an embodiment of the present invention, such as
Shown in Fig. 6, the device 500 may include：At least one processor (processor) 501, internal memory (memory) 502, ancillary equipment
Interface (peripheral interface) 503, input/output subsystem (I/O subsystem) the 504, and of power circuit 505
Communication line 506.
Internal memory 502 may include operating system 512 and obtain backlight illumination routine 522.For example, internal memory 502 may include at a high speed
Random access memory (high-speed random access memory), disk, static RAM
(SPAM), dynamic random access memory (DRAM), read-only storage (ROM), flash memory or non-voltile memory.Internal memory 502 can
Store for operating system 512 and obtain the program coding of backlight illumination routine 522, that is to say, that may include to obtain backlight illumination
Device 500 action needed for software module, instruction set architecture or the various data outside it.Now, processor 501 or outer
Other controllers of the grade of peripheral equipment interface 506 can be controlled with the access of internal memory 502 by processor 501.
Peripheral interface 503 can will obtain the input and/or output ancillary equipment and treatment of the device 500 of backlight illumination
Device 501 and internal memory 502 are combined.Also, input/output subsystem 504 can set various input/output ancillary equipment with periphery
Standby interface 506 is combined.
Power circuit 505 can be to all or part of supply electric power of the circuit element of terminal device.For example, power circuit
505 may include such as more than one power supply, charging system, the power failure monitor of electric power management system, battery or exchange (AC)
Circuit (power failure detection circuit), power converter or inverter, power state marker character are used for
Electric power generation, management, any other circuit elements of distribution.
Communication line 506 is communicated using at least one interface with other main frames.
By implementing, software module or instruction set architecture of the storage in internal memory 502 are executable to obtain backlight to processor 501
Various functions and processing data of the device 500 of brightness.That is, processor 501 by perform basic arithmetic, logic with
And the input/output calculation of computer system, may be configured as processing the order of computer program.
The method that processor 501 is structured to perform the acquisition backlight illumination in above-described embodiment.
When the device 500 for obtaining backlight illumination of above-mentioned composition when backlight brightness data is obtained every time, need to judge
After the PWM dim signals for receiving include default saltus step, sent to photo-sensing device in setting time and read instruction, rather than with
Machine sends so that sends and reads instruction with basis of time, the device for as obtaining backlight illumination sends the time for reading instruction
It is more stable, make photo-sensing device receive read instruction time it is more stable, and then photo-sensing device acquisition backlight it is bright
Degrees of data is more stable, so as to improve the stability of the back light source brightness of display device.
It is shown in Figure 7, it is a kind of structural representation of backlight brightness data processing unit provided in an embodiment of the present invention,
As shown in fig. 7, the device 600 may include：At least one processor (processor) 601, internal memory (memory) 602, periphery sets
Standby interface (peripheral interface) 603, input/output subsystem (I/O subsystem) 604, power circuit 605
With communication line 606.
Internal memory 602 may include operating system 612 and backlight brightness data handling routine 622.For example, internal memory 602 may include
High-speed random access memory (high-speed random access memory), disk, static RAM
(SPAM), dynamic random access memory (DRAM), read-only storage (ROM), flash memory or non-voltile memory.Internal memory 602 can
Store the program coding for operating system 612 and backlight brightness data handling routine 622, that is to say, that may include backlight illumination
Software module, instruction set architecture needed for the action of data processing equipment 600 or the various data outside it.Now, processor
601 or other controllers of the grade of peripheral interface 606 can be controlled by processor 601 with the access of internal memory 602.
Peripheral interface 603 can be by the input of backlight brightness data processing unit 600 and/or output ancillary equipment and place
Reason device 601 and internal memory 602 are combined.Also, input/output subsystem 604 can be by various input/output ancillary equipment and periphery
Equipment interface 606 is combined.
Power circuit 605 can be to all or part of supply electric power of the circuit element of terminal device.For example, power circuit
605 may include such as more than one power supply, charging system, the power failure monitor of electric power management system, battery or exchange (AC)
Circuit (power failure detection circuit), power converter or inverter, power state marker character are used for
Electric power generation, management, any other circuit elements of distribution.
Communication line 606 is communicated using at least one interface with other main frames.
Processor 601 is by implementing the storage executable backlight illumination of the software module or instruction set architecture in internal memory 602
Various functions and processing data of data processing equipment 600.That is, processor 601 is by performing basic arithmetic, logic
And the input/output calculation of computer system, may be configured as processing the order of computer program.
Processor 601 is structured to perform the backlight brightness data processing method in above-described embodiment.
It is to judge when the backlight brightness data processing unit of above-mentioned composition when backlight brightness data is obtained every time
After the PWM dim signals for receiving include default saltus step, the setting time after default saltus step sends to photo-sensing device and reads
Instruction, rather than random transmission, when setting time is identical, the reading for as sending reading instruction to photo-sensing device every time refers to
It is the set time to make the transmission time, then photo-sensing device every time read backlight brightness data be dimming cycle at the same time
Backlight brightness data in section, and then make the corresponding present intensity data under current duty cycle of the PWM dim signals of determination
It is more accurate, improve the stability of the back light source brightness of display device.
In addition, Fig. 8 is a kind of block diagram of the liquid crystal display 700 according to an exemplary embodiment.Such as Fig. 8 institutes
Show, a kind of liquid crystal display 700 provided in an embodiment of the present invention, the liquid crystal display 700 includes：Display module 701, be
Display module 701 provides the backlight module 702 of backlight, backlight drive device 703, PWM controller 704, photo-sensing device 705
And processor 706.
Wherein, the device 500 and backlight illumination of the acquisition backlight illumination described in above-described embodiment are included in processor 706
Data processing equipment 600.Backlight module 702 is connected with backlight drive device 703.PWM controller part 704 and backlight drive device
Connection 703.Light sensitive device 705 is arranged at backlight module 702, is connected with the device 500 for obtaining backlight illumination.Obtain backlight bright
The device 500 of degree is connected with backlight brightness data processing unit 600.Backlight brightness data processing unit 600 and acquisition backlight are bright
The device 500 of degree is connected with PWM controller part 504.
For convenience of description, it is divided into various units with function during description apparatus above to describe respectively.Certainly, this is being implemented
The function of each unit can be realized in same or multiple softwares and/or hardware during invention.
Those skilled in the art considering specification and practice here after disclosure of the invention, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture being described above and be shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (10)
1. it is a kind of obtain backlight illumination method, it is characterised in that be applied to be built-in with the liquid crystal display of photo-sensing device
In, methods described includes：
Receive the PWM dim signals that pulse width modulation (PWM) controller sends；
Whether the PWM dim signals that judgement is received include default saltus step；
If including the setting time after the default saltus step sends to photo-sensing device and reads instruction；
Receive the photo-sensing device and read the backlight brightness data that instruction is obtained according to described.
2. method according to claim 1, it is characterised in that the default saltus step includes：The rising edge saltus step of signal and/
Or the trailing edge saltus step of signal；
Whether the PWM dim signals for judging to receive include that default saltus step includes：
The trailing edge of rising edge saltus step and/or signal that whether the PWM dim signals that detection is received include signal is jumped
Become.
3. a kind of backlight brightness data processing method, it is characterised in that including：
At least one backlight brightness data is obtained, wherein, obtaining any one backlight brightness data includes：By claim 1 or 2
The method of the acquisition backlight illumination described in any one, obtains described any one backlight brightness data；
According at least one backlight brightness data, determine that PWM dim signals are corresponding current bright under current duty cycle
Degrees of data.
4. method according to claim 3, it is characterised in that described according at least one backlight brightness data, really
Determining the corresponding present intensity data under current duty cycle of PWM dim signals includes：
According at least one backlight brightness data, the first brightness data is obtained；
Whether the number of the first brightness data that judgement has been obtained reaches predetermined number；
If the number not up to predetermined number of first brightness data for having obtained, at least one back of the body of acquisition is re-executed
Luminance data；
If the number of first brightness data for having obtained reaches predetermined number, the first brightness obtained according to
Data, determine the corresponding present intensity data under current duty cycle of PWM dim signals.
5. method according to claim 4, it is characterised in that described according at least one backlight brightness data, obtains
Taking the first brightness data includes：
In at least one backlight brightness data, n backlight brightness data backlight brightness data is chosen；Wherein, the n
The numerical value of any one backlight brightness data in backlight brightness data is not less than any one backlight in k backlight brightness data
The numerical value of brightness data；The k backlight brightness data be at least one backlight brightness data in remove n backlight illumination number
Other backlight brightness datas outside；
The average value of the n backlight brightness data is calculated, first brightness data is obtained.
6. the method according to claim 4 or 5, it is characterised in that the setting time includes：
The setting time is the number according to the backlight brightness data for having received, using formulaDetermine；Wherein,
TPWMIt it is the cycle of PWM dim signals, x is the number of at least one backlight brightness data, and i is the backlight illumination for having received
The number of data.
7. the method according to claim 4 or 5, it is characterised in that the setting time includes：
The setting time is the number according to received backlight brightness data, using formulaIt is determined that
's；Wherein, Δ TcRepresent that PWM controller provides the delay time that pwm signal and backlight module are provided between backlight.
8. it is a kind of obtain backlight illumination device, it is characterised in that including：Processor, memory and communication interface, the treatment
Device, the memory are connected with the communication interface communication bus；
The communication interface, for sending and receiving signal；
The memory, for store program codes；
The processor is for reading the program code stored in the memory and any in execution such as claim 1 to 2
Method described in.
9. a kind of backlight brightness data processing unit, it is characterised in that processor, memory and communication interface, the processor,
The memory is connected with the communication interface communication bus；
The communication interface, for sending and receiving signal；
The memory, for store program codes；
The processor is for reading the program code stored in the memory and any in execution such as claim 3 to 7
Method described in.
10. a kind of liquid crystal display, it is characterised in that including：Display module, the back of the body of backlight is provided for the display module
Light module, backlight drive device, PWM controller, photo-sensing device and processor；Wherein, included in the processor and had the right
It is required that described in 8 acquisition backlight illumination device and claim 9 described in backlight brightness data processing unit；
The backlight module is connected with the backlight drive device；
The PWM controller part is connected with the backlight drive device；
The light sensitive device is arranged at the backlight module, and the device with the acquisition backlight illumination is connected；
The device for obtaining backlight illumination is connected with the backlight brightness data processing unit；
The device of the backlight brightness data processing unit and acquisition backlight illumination is connected with the PWM controller part.
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| CN201611234350.XA CN106782378B (en) | 2016-12-28 | 2016-12-28 | Backlight brightness acquisition method and device, data processing method and device thereof and liquid crystal display device |
| PCT/CN2017/098406 WO2018120861A1 (en) | 2016-12-28 | 2017-08-22 | Method and device for obtaining and processing backlight brightness data, and liquid crystal display device |
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| CN201611234350.XA CN106782378B (en) | 2016-12-28 | 2016-12-28 | Backlight brightness acquisition method and device, data processing method and device thereof and liquid crystal display device |
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| CN110648634A (en) * | 2018-06-26 | 2020-01-03 | 青岛海信医疗设备股份有限公司 | Backlight brightness determining and adjusting method and device, storage medium and electronic equipment |
| CN109801601A (en) * | 2019-03-21 | 2019-05-24 | 京东方科技集团股份有限公司 | Driving method, control circuit and the display device of backlight |
| US10984710B2 (en) | 2019-03-21 | 2021-04-20 | Beijing Boe Optoelectronics Technology Co., Ltd. | Method for sending driving data of backlight source, control circuit and display device |
| US11501704B2 (en) | 2019-03-21 | 2022-11-15 | Beijing Boe Optoelectronics Technology Co., Ltd. | Method for sending driving data of backlight source, control circuit and display device |
| CN111583878A (en) * | 2020-06-11 | 2020-08-25 | 京东方科技集团股份有限公司 | Backlight source control device, control method and display device |
| CN111583878B (en) * | 2020-06-11 | 2021-09-10 | 京东方科技集团股份有限公司 | Backlight source control device, control method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106782378B (en) | 2019-12-31 |
| WO2018120861A1 (en) | 2018-07-05 |
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