CN105070241B - Detection method, device and the LCD TV of multi partition dynamic backlight - Google Patents
Detection method, device and the LCD TV of multi partition dynamic backlight Download PDFInfo
- Publication number
- CN105070241B CN105070241B CN201510608695.6A CN201510608695A CN105070241B CN 105070241 B CN105070241 B CN 105070241B CN 201510608695 A CN201510608695 A CN 201510608695A CN 105070241 B CN105070241 B CN 105070241B
- Authority
- CN
- China
- Prior art keywords
- backlight
- subarea
- liquid crystal
- test image
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
Detection method, device and the LCD TV of multi partition dynamic backlight of the present invention, during the display of test image, by according to the backlight data, each backlight subarea is respectively driven with prefixed time interval, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented.Since liquid crystal display is not when having backlight, image will not be observed, this application provides respectively drive each backlight subarea in technical solution with prefixed time interval, since backlight subarea is separately-driven, therefore when the backlight in a backlight subarea is in the conductive state, the backlight of other backlight subareas is in close state, simultaneously with the presence of because of preset time interval when respectively driving backlight, therefore influence of the visual persistence phenomenon caused by the light of separately-driven backlight subarea to observer is avoided, so that can individually be presented on liquid crystal display panel.What it is by detection test pictures is in present condition, and the detection to backlight subarea can be completed.
Description
Technical field
The present invention relates to dynamic backlight control technology field more particularly to a kind of detection method of multi partition dynamic backlight,
Device and LCD TV.
Background technique
With the continuous development and further investigation of light emitting diode (Light Emitting Diode, abbreviation LED) technology,
LED has become a kind of mainstream as the backlight of LCD TV, and in LED backlight liquid crystal tv technology, LED multi partition
Dynamic backlight control technology can effectively economize on electricity since it can preferably improve the dynamic contrast and stereovision of image,
It is increasingly becoming the mainstream of LCD TV area research and application.
At present in the LED liquid crystal television with multi partition dynamic backlight control function, still, in the display of subregion backlight
During by use, if the back light of which backlight subarea goes wrong, cisco unity malfunction, user is likely difficult to examine
Feel, display device cannot be safeguarded in time, reduce the service life of display device.Therefore dynamic backlight control how is detected
The problem of function processed is this field urgent need to resolve whether normal operation.
Summary of the invention
The present invention provides detection method, device and the LCD TV of a kind of multi partition dynamic backlight, to solve how to detect
Dynamic backlight control function whether normal operation the problem of.
In a first aspect, the present invention provides a kind of detection method of multi partition dynamic backlight, comprising:
Test image is sent to liquid crystal display, so that liquid crystal display shows the test image；
Obtain the backlight data of each backlight subarea；
According to the backlight data, each backlight subarea is respectively driven with prefixed time interval so that on liquid crystal display with
The test image of each backlight subarea corresponding position is individually presented.
Second aspect, the present invention provide a kind of detection device of multi partition dynamic backlight, comprising:
Liquid crystal display；
Image processing module sends test image to liquid crystal display for image processor, so that liquid crystal display screen display
Show the test image；
Backlight obtains module, for obtaining each backlight subarea backlight data；
Backlight drive module, for each backlight subarea being respectively driven with prefixed time interval, so that liquid according to backlight data
Test image on crystal display screen with each backlight subarea corresponding position is individually presented.
The third aspect, the present invention provide a kind of LCD TV, comprising:
Video frequency processing chip, for sending test image to liquid crystal display；
Liquid crystal display, for showing test image in display area by the control of sequence controller；
Video frequency processing chip is also used to obtain backlight data；
Backlight drive circuit, the backlight data for being determined according to video frequency processing chip, is distinguished with prefixed time interval
Each backlight subarea is driven, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented.
Detection method, device and the LCD TV of multi partition dynamic backlight of the present invention, during the display of test image,
By respectively driving each backlight subarea with prefixed time interval according to the backlight data so that on liquid crystal display with each back
The test image of light subregion corresponding position is individually presented.Since liquid crystal display is non-luminous, so when there is no backlight,
Image on display screen will not be observed, and this application provides respectively drive each backlight in technical solution with prefixed time interval
Subregion, due to backlight subarea be it is separately-driven, backlight in a backlight subarea in the conductive state is other backlights
The backlight of subregion is in close state, while with the presence of because of preset time interval when respectively driving backlight, being kept away
Influence of the visual persistence phenomenon caused by the light of separately-driven backlight subarea to observer is exempted from, so that in liquid crystal display panel
On, it can individually present.If backlight subarea cisco unity malfunction, test image with backlight subarea corresponding position if cannot
Normal to present, i.e., test image can be presented partially dark or cannot be observed, if backlight subarea is working properly, test image
Display is normal, therefore the detection to backlight subarea can be completed in present condition by detection test pictures.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram of one embodiment of detection method of multi partition dynamic backlight of the present invention；
Fig. 2 is the structural schematic diagram of one embodiment of detection device of multi partition dynamic backlight of the present invention；
Fig. 3 is the effect picture that the liquid crystal display of embodiment of the present invention method is shown；
Fig. 4 is the flow diagram of another embodiment of detection method of multi partition dynamic backlight of the present invention；
Fig. 5 is the subregion backlight control functional block diagram of embodiment of the present invention method；
Fig. 6 is the multichannel backlight drive circuit functional block diagram of embodiment of the present invention method；
Fig. 7 is the structural schematic diagram of one embodiment of detection device of multi partition dynamic backlight of the present invention；
Fig. 8 is the structural schematic diagram of another embodiment of detection device of multi partition dynamic backlight of the present invention；
Fig. 9 is the structural schematic diagram of one embodiment of LCD TV of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Method involved in the embodiment of the present invention can be applied to the liquid crystal with LED subregion dynamic backlight control function
In TV.
Technical solution of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 is the flow diagram of one embodiment of detection method of multi partition dynamic backlight of the present invention.The present embodiment is held
Row main body can be the detection device of multi partition dynamic backlight, which can be set in LCD TV, for detecting liquid crystal
The dynamic backlight control function of TV is whether normal operation.As shown in Figure 1, the method for the present embodiment includes:
Step 101 sends test image to liquid crystal display, so that liquid crystal display shows the test image；
Step 102 obtains each backlight subarea backlight data；
Step 103, according to backlight data, each backlight subarea is respectively driven with prefixed time interval, so that liquid crystal display
The upper test image with each backlight subarea corresponding position is individually presented.
Firstly, test image is sent to liquid crystal display, so that liquid crystal display shows test image, wherein in reality
In, test image can be monochrome image, it can be the homogeneous image of any same grayscale, for effectively prominent backlight
Effect is preferably chosen whole white image.
Concretely, after image processor sends test image to liquid crystal display, liquid crystal molecule in liquid crystal display can be with
It is rotated under the control of gate drivers and source electrode driver, liquid crystal molecule is according to the figure of each pixel in test image
Display of the test image on liquid crystal display can be completed after completing rotation as data, but due to liquid crystal molecule not active
It shines, so if without backlight although liquid crystal display shows test image, still, human eye can not be experienced
Test image.This is also the technical basis of the can be carried out backlight detection of the present invention.
Then, backlight obtains the backlight data that module obtains each backlight subarea, and above-mentioned backlight data can be according to test
What image itself obtained, it is also possible to one group of pre-set backlight brightness values.
Fig. 2 is the backlight multi partition schematic diagram of embodiment of the present invention method, as shown in Fig. 2, entire backlight source matrix includes A
The M subregion in direction and N number of subregion in the direction B assume M=16, N=9 in the present embodiment.Above-mentioned subregion can be to be divided in advance
's.
When obtaining backlight illumination according to test image, monochrome display image can be carried out according to backlight subarea corresponding
Picture portion, then in each picture portion of statistical test image pixel gray level information, finally according in each picture portion
The gray level information of pixel calculates the backlight brightness values of the corresponding each backlight subarea of each picture portion, and with above-mentioned backlight illumination
It is worth the backlight data as the backlight subarea, i.e. 1-16 arranges all subregion corresponding backlights in test image in acquisition Fig. 2
Data, the backlight brightness values in backlight data increase with the increase of the average brightness of pixel in each subregion at this time.
It may include the backlight brightness values of each backlight subarea for one group of pre-set backlight data value.Above-mentioned
In backlight data, backlight data specifically can be a brightness value of 0-255, the corresponding backlight of the bigger subregion of brightness value
Backlight illumination is bigger, i.e., liquid crystal display is shown brighter.
Backlight drive module respectively drives each backlight subarea according to backlight data, with prefixed time interval, so that each backlight
The corresponding test image of subregion is individually presented.
Particularly, the brightness value of back light in all backlight subareas is contained in backlight data, with the backlight of M*N point
Include M*N backlight data in backlight data for area, each backlight subarea is driven to refer to the corresponding backlight in conducting backlight subarea
Source, so that backlight is showed with backlight data to corresponding brightness.Backlight drive module is according to backlight data in this step
Respectively drive each back light with prefixed time interval so that on liquid crystal display with the backlight subarea corresponding position of conducting
Test image can normally show, the test image of the back light corresponding position not turned on due to there is no a backlight and no
To display, to realize the independent presentation of the test image of each backlight subarea corresponding position on liquid crystal display, Jin Erke
To judge whether the corresponding backlight subarea in the position can work normally by the position of the test image individually occurred.One
In a display cycle, if the test image of corresponding position is shown normally, the corresponding backlight subarea in the position can be normal
Driving, if the test image of corresponding position fails normally to show, there are problems for the corresponding backlight subarea in the position.
Particularly, the backlight of each backlight subarea is respectively driven with prefixed time interval, specifically: first turn on first
The backlight of backlight subarea, the light source of other backlight subareas is in close state at this time；It is then shut off the back of the first backlight subarea
Light source and the backlight that the second backlight subarea is connected after prefixed time interval, wherein prefixed time interval is not less than 0.1 second,
Preset time for eliminating persistence effect of the visual pattern in human eye so that each backlight subarea in conducting, liquid crystal display
The test image subregion of corresponding position can be individually presented on screen.Preferably greater than 0.4 second.Above-mentioned two backlight subarea is aobvious
Any one in showing device backlight subarea.First backlight subarea and the second backlight subarea can be two adjacent backlight subareas
, it is also possible to two non-conterminous backlight subareas, it is preferred that the first backlight subarea and the second backlight subarea are two adjacent back
Light subregion, backlight subarea adjacent in this way can sequentially turn on, and be conducive to observation and the record of testing staff.It can make simultaneously pre-
If time interval is 1 second or more.The demand that can satisfy detection work in this way facilitates staff to detect and record.
In conclusion backlight drive module can respectively drive each backlight point at predetermined intervals according to backlight data
The backlight in area, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented.Pass through observation
Whether display state of the test image at each position of liquid crystal display be normal, i.e., it can be inferred that a above-mentioned liquid crystal display position
Whether the working condition for setting corresponding backlight subarea is normal, that is, if the test image of corresponding position is shown normally, the position
Setting corresponding backlight subarea can normally drive, if the test image of corresponding position fails normally to show, the position pair
There are problems for the backlight subarea answered.
Fig. 3 is the effect picture that the liquid crystal display of embodiment of the present invention method is shown.Due in test image image it is flat
Equal gray value is identical, so the backlight data of calculated different subregions is also identical, average gray value is by the institute that includes in subregion
There is pixel statistics to get, can be the weighted results of maximum value and average value.As shown in figure 3, due to backlight drive module one
Prefixed time interval respectively drives the back light of each backlight subarea, so at any time, only a backlight subarea is by point
It is bright, while all pixels point of display panel is opened according to test image, thus on liquid crystal display with light
The test image of backlight subarea corresponding position can be showed individually, and the image at remaining position is defeated due to not no backlight
Enter, so corresponding test image cannot be showed, so, within a test period, it visually can intuitively find out liquid crystal
The brightness change of position on display screen, whether so as to judge dynamic backlight control function or effect normally.
The above method realize when, can by the user interface of LCD TV increase by one " dynamic backlight detection/
The option of demonstration ", user can start detection pattern after selecting this option.
The detection method of multi partition dynamic backlight provided in an embodiment of the present invention, backlight drive module can be according to backlight numbers
According to the backlight for respectively driving each backlight subarea at predetermined intervals, so that the image of each backlight subarea corresponding position point
Area is individually presented on liquid crystal display.Since liquid crystal display is non-luminous, so when there is no backlight, on display screen
Image will not be observed, this application provides respectively driving each backlight subarea in technical solution with prefixed time interval, due to
Backlight subarea is separately-driven, therefore it is the back of other backlight subareas that the backlight in a backlight subarea is in the conductive state
Light source is in close state, while with the presence of because of preset time interval when respectively driving backlight, avoiding difference
Influence of the visual persistence phenomenon caused by the light of the backlight subarea of driving to observer can be with so that on liquid crystal display panel
Individually present.If backlight subarea cisco unity malfunction, test image with backlight subarea corresponding position if cannot normally be in
Existing, i.e., test image can be presented partially dark or cannot be observed, if backlight subarea is working properly, test image is shown just
Often, what it is therefore by detection test pictures is in present condition, and the detection to backlight subarea can be completed.
In another embodiment of the method for the present invention, on the basis of embodiment shown in Fig. 1, in practical applications,
Obtain all backlight subareas corresponding backlight data in test image concrete mode can there are many, optionally, as one
The enforceable mode of kind, can specifically carry out in the following ways:
Mode one: according in test image, the brightness of all pixels point in picture portion corresponding with backlight subarea
Value, to determine the backlight data of the backlight subarea.
Specifically, which, can be from test image image after the test image data for receiving signal source input
Then middle extraction backlight data is mapped as the corresponding backlight data in backlight subarea；Backlight data can be according in normal picture
The brightness value of all pixels point determines.
Test image deposits in position corresponding during display with backlight, and concretely, test image is needed in liquid
It is shown on crystal display screen, liquid crystal display and backlight deposit corresponding relationship in position, particularly, on liquid crystal display
Each corresponding backlight subarea is provided with a display subregion, and display subregion does not exist with entity state, merely into
When row image procossing, test image is divided into and the one-to-one picture portion in backlight subarea according to the display position of image.
One test image picture includes multiple pixels, and the number of pixel is much larger than the number of picture portion, therefore each image
Subregion may include multiple pixels of the test image, finally according to the picture portion in test image all pixels point
Brightness value determines the backlight data of corresponding backlight subarea.
Further, it is determined according to the brightness value of picture portion each in display area all pixels point in test image
The backlight data of corresponding backlight subarea can be carried out specifically in the following ways:
Obtain display area in all pixels point of each picture portion in test image brightness value average value and
Maximum value, using the weighted sum of average value and maximum value as the backlight data of corresponding backlight subarea.
Specifically, as shown in figure 3, obtaining in display area in all picture portions each picture portion in test image
In all pixels point brightness value, the brightness value of all pixels point in the picture portion is averagely obtained into average value, and
And maximum value is obtained, and the average value and maximum value are weighted to the backlight data summed as corresponding backlight subarea.Weighting
Coefficient can be preset value.
Certainly in other embodiments of the invention, the backlight data of backlight subarea can also be obtained by other algorithms,
The present invention does not limit this.
In above-mentioned specific embodiment, by according to picture portion all pixels in normal picture each in display area
The brightness value of point determines the backlight data of corresponding backlight subarea, and specifically can be true according to the average value and maximum value of brightness value
Surely the backlight data for corresponding to backlight subarea realizes acquisition backlight data.
Mode two: storing one or more backlight datas in memory module, and backlight obtains module from above-mentioned storage mould
The backlight data of each backlight subarea is obtained in block；
On the basis of the above embodiment, further, in practical applications, each subregion in display area is determined
Backlight data after, controlled according to backlight illumination of the backlight data to subregion corresponding in display area, can be specific
It is operated in the following way:
Backlight drive module respectively drives the backlight of each backlight subarea with prefixed time interval according to backlight data, with
The corresponding picture portion in the backlight subarea being lit individually is shown.
A specific embodiment is used below, to how the backlight data that basis is got is to right in the second display area
The technical solution that the backlight illumination for the subregion answered is controlled is described in detail.
Fig. 4 is the flow diagram of another embodiment of detection method of multi partition dynamic backlight of the present invention.Fig. 5 is the present invention
The subregion backlight control functional block diagram of embodiment of the method.Fig. 6 is the multichannel backlight drive circuit principle of embodiment of the present invention method
Block diagram.The specific of dynamic backlight control function process whether normal operation how is detected as shown in figure 4, providing in the present embodiment
Embodiment specifically comprises the following steps:
Step 101, image processing module send monochrome image to liquid crystal display, so that liquid crystal display shows the monochrome
Image；
Step 1021, backlight obtain each pixel that module obtains picture portion corresponding with each backlight subarea in monochrome image
The grayscale value of point；
Step 1022, backlight obtain module according to the grayscale value of pixel each in each picture portion, and each backlight is calculated
The backlight data of subregion；
Step 1031, backlight processing unit determine the backlight of each backlight subarea according to the backlight data of each backlight subarea
The corresponding PWM duty cycle of group, and it is sent to the corresponding PWM controller of each backlight group；
Step 1032, PWM controller export PWM to each backlight group respectively with prefixed time interval according to PWM duty cycle
Signal is controlled, so that the picture portion of the corresponding monochrome image in each backlight subarea can be individually presented.
Step 101 is executed by the image processing module in Fig. 5, and image processing module sends single to liquid crystal display
Chromatic graph picture, and liquid crystal display is controlled by time-sequence control module and shows the monochrome image, concretely in liquid crystal display
Liquid crystal molecule can be inverted under the control of gate drivers and source electrode driver, and liquid crystal molecule can be complete after completing reversion
Display of the monochromatizing image on liquid crystal display, but since liquid crystal molecule does not shine actively, so if without backlight
If, although liquid crystal display shows monochrome image, still, human eye can not experience monochrome image.
Step 1021 and step 1022 can obtain module by backlight and realize, liquid crystal display is provided with several displays
Subregion, display subregion and backlight subarea correspond, concretely, when backlight is provided with M*N backlight subarea, liquid crystal display
Screen is provided with M*N display subregion, shows subregion there is no being embodied in physical aspect, only with backlight subarea and liquid crystal display
Corresponding relationship on the position of screen carries out the differentiation of display subregion.It, can be by achromatic map according to the display subregion of liquid crystal display
As carrying out picture portion, concretely, monochrome image needs are presented on liquid crystal display, it is possible to according to display point
Monochrome image is divided into M*N picture portion by area, and picture portion is also corresponded with backlight subarea.
Particularly, backlight obtains module by the gray level information of each pixel in acquisition picture portion, and according to above-mentioned
Gray level information calculates the backlight brightness values of corresponding backlight subarea, can be using the backlight brightness values as above-mentioned backlight subarea
Backlight data.Had in the specific embodiment of calculation in front and elaborated, was not repeated herein.
Step 1031 and step 1032 can be realized by backlight drive module as shown in Figure 5.Specifically, backlight drive
Module includes backlight processing unit and PWM controller, and step 1031 can have the execution of backlight processing unit, and step 1032 can have PWM
Controller executes.
Particularly, backlight drive module controls backlight illumination according to the backlight data got, firstly, backlight
Processing module can determine the corresponding backlight group in each backlight subarea, the backlight in backlight data according to preset mapping relations
Source group is the LED light string on right side in Fig. 6；Backlight processing module determines that its is corresponding according to the backlight data of each backlight subarea
The duty ratio of pwm signal, it is assumed that backlight data is the brightness value of 0-255, then brightness value is bigger, and the duty ratio of pwm signal is bigger.
The duty ratio for each backlight pwm signal determined is sent to PWM controller by backlight processing unit, and PWM controller is according to accounting for
Sky controls the conducting situation for the metal-oxide-semiconductor being connected with LED light string, to control backlight than exporting control signal to backlight group
Group generates brightness corresponding with backlight data.Wherein PWM controller can be multiple, and each PWM controller can be controlled
Make multiple backlight groups.
When above-mentioned PWM controller controls the generation brightness corresponding with backlight data of backlight group according to PWM duty cycle,
The amplitude of pwm signal can be a preset value, i.e. actual output current is preset.
In other embodiments of the present invention, backlight processing unit module can also pre-generate current data, and according to electricity
Flow data and predetermined reference voltage Vref adjust actual output current, thus control backlight group generate it is opposite with backlight data
The brightness answered, the output more big corresponding backlight illumination of electric current is bigger in the case of identical duty ratio.Actual output current Iout=
(current data/Imax)(Vref/Rs), wherein Vref is preset reference voltage, for example 500mV, Rs are below metal-oxide-semiconductor
Current sampling resistor, for example be 1 Ω.The register that current data usually passes through operation PWM controller is configured, if deposit
The bit wide of device is 10bit, then Imax=1024 in formula, it is possible thereby to which Iout demand according to actual needs, carries out electric current number
According to calculating.Such as the electric current if necessary to 250mA, by above-mentioned formula, current data is 512 need to set.Usual PWM control
Device processed is cascaded by multiple chips, and every chips can drive multi-channel PWM signal to export to LED light string again.
DC/DC converter in Fig. 6 is used to the voltage of power input being converted to LED light string required voltage, but also
For maintaining stable voltage by the feedback of feedback loop, protection detection can also be carried out to backlight processing unit, at backlight
Manage unit operation after can to DC/DC converter send enable signal so that DC/DC converter start to backlight processing unit into
Row protection detection, avoids over-voltage or overcurrent.
The detection method of multi partition dynamic backlight provided in this embodiment, backlight drive module can according to backlight data with
Preset time interval respectively drives the backlight of each backlight subarea so that on liquid crystal display with each backlight subarea corresponding position
The monochrome image at place is individually presented.Since liquid crystal display is non-luminous, so the image when not having backlight, on display screen
It will not be observed, this application provides each backlight subarea is respectively driven in technical solution with prefixed time interval, due to backlight
Subregion is separately-driven, therefore it is the backlight of other backlight subareas that the backlight in a backlight subarea is in the conductive state
It is in close state, while with the presence of because of preset time interval when respectively driving backlight, avoiding and respectively driving
Backlight subarea light caused by influence of the visual persistence phenomenon to observer can be independent so that on liquid crystal display panel
It presents.If backlight subarea cisco unity malfunction, test image with backlight subarea corresponding position if cannot be normally presented, i.e.,
Test image can be presented partially dark or cannot be observed, if backlight subarea is working properly, test image show normally, because
This is in present condition by detection test pictures, and the detection to backlight subarea can be completed.
Fig. 7 is the structural schematic diagram of one embodiment of detection device of multi partition dynamic backlight of the present invention.As shown in fig. 7, this
The detection device of the multi partition dynamic backlight of embodiment may include: image processing module, backlight acquisition module, backlight drive
Module, liquid crystal display；
Image processing module sends test image to liquid crystal display for image processor, so that liquid crystal display screen display
Show the test image；
Backlight obtains module, for obtaining each backlight subarea backlight data；
Backlight drive module, for each backlight subarea being respectively driven with prefixed time interval, so that liquid according to backlight data
Test image on crystal display screen with each backlight subarea corresponding position is individually presented.
The device of the present embodiment can integrate in LCD TV.Backlight drive module can be according to backlight data with default
Time interval respectively drive the backlight of each backlight subarea so that on liquid crystal display with each backlight subarea corresponding position
Test image is individually presented.Since liquid crystal display is non-luminous, so the image on display screen will not when not having backlight
It is observed, this application provides each backlight subarea is respectively driven in technical solution with prefixed time interval, due to backlight subarea
It is separately-driven, therefore it is that the backlight of other backlight subareas is in that the backlight in a backlight subarea is in the conductive state
Closed state, while with the presence of because of preset time interval when respectively driving backlight, avoid separately-driven back
Influence of the visual persistence phenomenon caused by the light of light subregion to observer, so that can individually be presented on liquid crystal display panel.
If backlight subarea cisco unity malfunction, test image with backlight subarea corresponding position if cannot be normally presented, that is, be tested
Image can be presented partially dark or cannot be observed, if backlight subarea is working properly, test image is shown normally, therefore logical
Cross detection test pictures is in present condition, and the detection to backlight subarea can be completed.
Wherein, backlight drive module respectively drives each backlight subarea according to backlight data with prefixed time interval, specifically
Are as follows: according to backlight data, the first backlight subarea is connected in backlight drive module, after a period of time is connected, closes the first backlight point
Simultaneously the second backlight subarea is connected in area after prefixed time interval.Wherein, the turn-on time of each backlight subarea can be set on demand,
But prefixed time interval has to make that the test image of each backlight subarea corresponding position is individually presented on liquid crystal display panel, that is,
Prefixed time interval is not less than 0.1 second, influences to avoid caused by visual persistence phenomenon, so that the backlight subarea being respectively turned on
Image at corresponding position can be individually presented.
On the basis of the embodiment shown in fig. 7, optionally, as a kind of enforceable mode, backlight obtains module, specifically
For:
Obtain the grayscale value of each pixel of picture portion corresponding with backlight subarea in test image；
According to the grayscale value of pixel each in described image subregion, the backlight data of backlight subarea is calculated.
Optionally, as a kind of enforceable mode, backlight obtains, is specifically used for:
Obtain in test image in picture portion corresponding with each backlight subarea the brightness value average value of all pixels point and
Maximum value, using the weighted sum of average value and maximum value as the backlight data of the subregion.
Optionally, as shown in figure 8, backlight drive module includes backlight processing unit and pwm driver, wherein at backlight
Reason unit is used for: according to the backlight data of each backlight subarea, determine the corresponding PWM duty cycle of backlight group of each backlight subarea,
And it is sent to the corresponding PWM controller of each backlight group.PWM controller is used for: controller is according to PWM duty cycle with preset time
Interval exports pwm control signal to each backlight group respectively, so that the picture portion of the corresponding monochrome image in each backlight subarea can
Individually to present.
Optionally, as a kind of enforceable mode, test image is the image of same grayscale.Preferably test image is
White field picture.
It should be noted that for the detection device embodiment of multi partition dynamic backlight, since it is essentially corresponded to
Embodiment of the method, so the relevent part can refer to the partial explaination of embodiments of method.
Fig. 9 is the structural schematic diagram of one embodiment of LCD TV of the present invention.As shown in figure 9, the LCD TV of the present embodiment,
It may include: video frequency processing chip, sequence controller, liquid crystal display, backlight drive circuit；
Wherein, video frequency processing chip, for sending test image to liquid crystal display；
Liquid crystal display, for showing test image in display area by the control of sequence controller；
Video frequency processing chip is also used to obtain backlight data；
Backlight drive circuit, the backlight data for being determined according to video frequency processing chip, is distinguished with prefixed time interval
Each backlight subarea is driven, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented.
Wherein, the LCD TV of the present embodiment can also include memory, for storing program and image data information；Tool
Body, program may include program code, and said program code includes computer operation instruction.Memory may be comprising depositing at random
Access to memory (random access memory, abbreviation RAM), it is also possible to further include nonvolatile memory (non-
Volatile memory), a for example, at least magnetic disk storage.
It can also include: host processor chip, for executing the program of memory storage, control other component executes Fig. 1-
The technical solution of embodiment of the method shown in Fig. 6, the LCD TV of the present embodiment, implementing principle and technical effect and Fig. 1-Fig. 6
Shown in embodiment of the method it is similar, can refer to Fig. 1-embodiment of the method shown in fig. 6, details are not described herein again.
Above-mentioned component is communicated by one or more bus.It will be understood by those skilled in the art that shown in Fig. 9
The structure of LCD TV does not constitute a limitation of the invention simultaneously, can also include than illustrating more or fewer components or group
Close certain components or different component layouts.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, apparatus embodiments described above are merely indicative, for example, the unit or module
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or module
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of equipment or module
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The module as illustrated by the separation member may or may not be physically separated, aobvious as module
The component shown may or may not be physical module, it can and it is in one place, or may be distributed over multiple
In network unit.Some or all of the modules therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of detection method of multi partition dynamic backlight characterized by comprising
Test image is sent to liquid crystal display, so that liquid crystal display shows the test image；
Obtain the backlight data of each backlight subarea；
According to the backlight data, each backlight subarea is respectively driven with prefixed time interval so that on liquid crystal display with each back
The test image of light subregion corresponding position is individually presented, wherein the prefixed time interval is not less than 0.1 second.
2. the method according to claim 1, wherein described respectively drive each backlight subarea with prefixed time interval
Specifically:
The backlight of the first backlight subarea is connected；
It closes the backlight of the first backlight subarea and the backlight of the second backlight subarea is connected after prefixed time interval.
3. the method according to claim 1, wherein described according to the backlight data, with prefixed time interval
Each backlight subarea is respectively driven, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented,
Include:
According to the backlight data of each backlight subarea, the corresponding PWM duty cycle of backlight group of each backlight subarea is determined, and be sent to
The corresponding PWM controller of each backlight group；
PWM controller exports pwm control signal to each backlight group respectively with prefixed time interval according to PWM duty cycle, so that
The picture portion of the corresponding monochrome image in each backlight subarea can be individually presented.
4. method according to claim 1 to 3, which is characterized in that the backlight number for obtaining each backlight subarea
According to, comprising:
Obtain the grayscale value of each pixel of picture portion corresponding with backlight subarea in test image；
According to the grayscale value of pixel each in described image subregion, the backlight data of backlight subarea is calculated.
5. method according to claim 1 to 3, which is characterized in that the backlight number for obtaining each backlight subarea
According to, specifically:
Obtain pre-stored backlight data.
6. method according to claim 1 to 3, which is characterized in that the test image is the figure of same grayscale
Picture.
7. a kind of detection device of multi partition dynamic backlight characterized by comprising
Liquid crystal display；
Image processing module sends test image to liquid crystal display for image processor, so that liquid crystal display shows this
Test image；
Backlight obtains module, for obtaining each backlight subarea backlight data；
Backlight drive module, for each backlight subarea being respectively driven with prefixed time interval, so that liquid crystal according to backlight data
Test image in display screen with each backlight subarea corresponding position is individually presented, wherein the prefixed time interval is not less than 0.1
Second.
8. device according to claim 7, which is characterized in that backlight drive module includes that backlight processing unit and PWM drive
Dynamic device；
Backlight processing unit is used for: according to the backlight data of each backlight subarea, determining that the backlight group of each backlight subarea is corresponding
PWM duty cycle, and it is sent to the corresponding PWM controller of each backlight group；
PWM controller is used for: controller is according to PWM duty cycle with prefixed time interval respectively to the output PWM control of each backlight group
Signal processed, so that the picture portion of the corresponding monochrome image in each backlight subarea can be individually presented.
9. device according to claim 8, which is characterized in that the backlight obtains module, is specifically used for:
Obtain the grayscale value of each pixel of picture portion corresponding with backlight subarea in test image；
According to the grayscale value of pixel each in described image subregion, the backlight data of backlight subarea is calculated.
10. a kind of LCD TV characterized by comprising
Video frequency processing chip, for sending test image to liquid crystal display；
Liquid crystal display, for showing test image in display area by the control of sequence controller；
Video frequency processing chip is also used to obtain backlight data；
Backlight drive circuit, the backlight data for being determined according to video frequency processing chip, is respectively driven with prefixed time interval
Each backlight subarea, so that the test image on liquid crystal display with each backlight subarea corresponding position is individually presented, wherein described
Prefixed time interval is not less than 0.1 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608695.6A CN105070241B (en) | 2015-09-22 | 2015-09-22 | Detection method, device and the LCD TV of multi partition dynamic backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510608695.6A CN105070241B (en) | 2015-09-22 | 2015-09-22 | Detection method, device and the LCD TV of multi partition dynamic backlight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105070241A CN105070241A (en) | 2015-11-18 |
| CN105070241B true CN105070241B (en) | 2018-12-11 |
Family
ID=54499594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510608695.6A Active CN105070241B (en) | 2015-09-22 | 2015-09-22 | Detection method, device and the LCD TV of multi partition dynamic backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105070241B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301808B (en) * | 2015-11-19 | 2018-06-29 | 四川长虹电器股份有限公司 | For the test method of the super more backlight subarea controls of backlight module |
| CN116048901B (en) * | 2023-03-31 | 2023-06-16 | 南京芯驰半导体科技有限公司 | Data detection method, device, electronic equipment, storage medium and chip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470276A (en) * | 2007-12-27 | 2009-07-01 | Tcl集团股份有限公司 | Method and device for correcting luminous parameters of LCD device |
| CN103050095A (en) * | 2013-01-06 | 2013-04-17 | 青岛海信电器股份有限公司 | Backlight driving method and backlight module as well as television |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101013140B1 (en) * | 2004-06-18 | 2011-02-10 | 삼성전자주식회사 | Multi-display system and control method thereof |
| CN101650481B (en) * | 2008-08-14 | 2011-09-28 | 比亚迪股份有限公司 | Method and system for debugging liquid crystal display |
| JP6104653B2 (en) * | 2013-03-11 | 2017-03-29 | Ｐｓジャパン株式会社 | Polystyrene resin composition for light guide plate and light guide plate |
| US9842532B2 (en) * | 2013-09-09 | 2017-12-12 | Nvidia Corporation | Remote display rendering for electronic devices |
| CN103792704A (en) * | 2014-01-27 | 2014-05-14 | 北京京东方视讯科技有限公司 | Testing device, method of testing device, display device and display method of display device |
-
2015
- 2015-09-22 CN CN201510608695.6A patent/CN105070241B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101470276A (en) * | 2007-12-27 | 2009-07-01 | Tcl集团股份有限公司 | Method and device for correcting luminous parameters of LCD device |
| CN103050095A (en) * | 2013-01-06 | 2013-04-17 | 青岛海信电器股份有限公司 | Backlight driving method and backlight module as well as television |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105070241A (en) | 2015-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105047141B (en) | Split screen detection method, device and the LCD TV of multi partition dynamic backlight | |
| CN105741724B (en) | Display device and the method for driving the display device | |
| CN105161064B (en) | Liquid crystal display brightness control method and device and liquid crystal display | |
| US11069307B2 (en) | Spliced display device and backlight control method therefor | |
| CN102097072B (en) | Driving method for local dimming of liquid crystal display device and apparatus using the same | |
| CN105185353B (en) | Liquid crystal display brightness control method and device and liquid crystal display | |
| CN106875896B (en) | A kind of source drive IC, display device and its driving method | |
| CN106557194B (en) | Driver IC and display equipment including the driver IC | |
| CN102394043B (en) | Integrated source electrode driving system | |
| CN100458501C (en) | LCD device | |
| CN109064979A (en) | Image display processing method and device, display device and storage medium | |
| CN110114818A (en) | Display driving method, driving device and display device | |
| WO2010056618A1 (en) | Custom psfs using clustered light sources | |
| CN1607884A (en) | Automatic image luminance control with backlight adjustment | |
| CN108281125A (en) | The method, apparatus and equipment of backlight illumination adjusting are carried out according to human eye characteristic | |
| CN101713873A (en) | Liquid crystal display device and driving method having the same | |
| CN103871372B (en) | For driving the device of light emitting diode matrix and using its liquid crystal indicator | |
| US9240150B2 (en) | Display module, display device, electronic equipment, and method for driving display module | |
| WO2010045038A1 (en) | High dynamic range display with rear modulator control | |
| CN104778939A (en) | Display brightness adjustment method and device of display device and display device | |
| CN107102834A (en) | Display device, multidisplay system and multi display method | |
| EP2923353B1 (en) | Automatic color adjustment on led video screen | |
| CN105070241B (en) | Detection method, device and the LCD TV of multi partition dynamic backlight | |
| CN109300442A (en) | Display system and its electronic equipment | |
| CN109119032A (en) | A kind of method and system that backlight that eliminating LCD smear is adjusted |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170109 Address after: 529000 Jiangmen City, Guangdong province advanced manufacturing sand demonstration park, Hisense Avenue, No. B District, No. 8 Applicant after: GUANGDONG HISENSE ELECTRONIC CO., LTD. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Applicant before: Qingdao Hisense Electric Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |