CN106228935B - A kind of method and display device keeping LCD screen brightness uniformity - Google Patents
A kind of method and display device keeping LCD screen brightness uniformity Download PDFInfo
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- CN106228935B CN106228935B CN201610695851.1A CN201610695851A CN106228935B CN 106228935 B CN106228935 B CN 106228935B CN 201610695851 A CN201610695851 A CN 201610695851A CN 106228935 B CN106228935 B CN 106228935B
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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
Abstract
The invention discloses a kind of methods for keeping LCD screen brightness uniformity, by being uniformly arranged multiple sensors in backlight of display device module internal, obtain the back light source brightness detection data of each sensor, and determine the average value and mean square deviation of all back light source brightness detection datas, and the absolute difference between each back light source brightness detection data and average value is determined when mean square deviation is greater than first threshold, using sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference as sensor of interest, and back light source brightness adjustment is carried out according to the back light source brightness detection data of sensor of interest and the other sensors adjacent with sensor of interest.So as to remain the uniformity of display screen intensity under the application scenarios high for display screen backlight illumination uniformity requirement.
Description
Technical field
The present invention relates to field of electronic display more particularly to a kind of methods for keeping LCD screen brightness uniformity.The present invention
Also relate to display device.
Background technique
Backlight module (Back Light module) is one of the key component of liquid crystal display panel (LCD panel), by
It does not shine in liquid crystal display panel itself, the function of backlight module is that well-off brightness supplies liquid crystal with the light source being evenly distributed
Panel can show picture.Backlight module is usually by upper glue frame (middle frame support), backboard (center), light source, light guide plate, expansion
It falls apart, reflector plate, diffusion sheet, prismatic lens composition.Wherein, diffusion sheet is a kind of optical diaphragm, mainly in diffusion film base material,
Many chemical particles are added, as scattering particles, light can be constantly different in two refractive index when by diffusion layer
Medium in pass through, there is a phenomenon where repeatedly refraction, reflection and scattering, so just cause optics diffusion effect, to be
Display provides a uniform area source.
Currently, technical staff, which generally passes through optical diaphragm, keeps brightness uniformity.But inventor is realizing mistake of the invention
It is found in journey, realizes that the uniformity of backlight module brightness may be only available for some common application scenarios by optical diaphragm,
Under the application scenarios more demanding for some pairs of backlight uniformities, uniform backlight is provided by optical diaphragm and is difficult to completely
Sufficient use demand.Especially in medical field, since medical display is in use to the uniformity of backlight and stabilization
Property require it is very high, it is therefore desirable to real-time detection simultaneously adjusts backlight illumination, guarantee medical image can be shown with most true effect.
In this case, uniform backlight is provided by optical diaphragm obviously cannot reach the requirement of usage scenario
Therefore, under some pairs of higher application scenarios of LCD screen backlight uniformity requirement, how to provide one kind can be with
The uniformity method for remaining screen backlight brightness, becomes those skilled in the art's urgent problem to be solved.
Summary of the invention
The problem of in view of the application background technique, the present invention provide a kind of method of adjustment of screen intensity and set
It is standby, the uniformity and stability of display screen intensity can be effectively kept, the display performance of display device is promoted.This method application
In the display device including backlight module, the backlight unit is uniformly provided with multiple sensors, this method comprises:
The back light source brightness detection data of each sensor is obtained, and determines the flat of all back light source brightness detection datas
Mean value and mean square deviation；
Judge whether the mean square deviation is greater than preset first threshold；
If the mean square deviation is greater than the first threshold, each back light source brightness detection data and the average value are determined
Between absolute difference, using sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference as target pass
Sensor, and detected according to the sensor of interest and the back light source brightness of the other sensors adjacent with the sensor of interest
Data carry out back light source brightness adjustment；
If the mean square deviation is not more than the first threshold, each sensor is reacquired after preset time period
Back light source brightness detection data.
Preferably, according to the sensor of interest and the backlight of the other sensors adjacent with the sensor of interest
Brightness detection data carries out back light source brightness adjustment, specifically:
The successively comparative selection sensor from the other sensors；
Judge whether the sensor of interest and the back light source brightness detection data of the comparison sensor are greater than respectively
The average value；
The sensor for needing to be adjusted is determined in the other sensors according to judging result, and the target is passed
The sensor that sensor and the needs are adjusted is as sensor to be adjusted；
LED in the neighborhood of the sensor to be adjusted is adjusted, the LED in the neighborhood and the biography to be adjusted
The distance of sensor is less than the distance between the sensor of interest and the other sensors.
Preferably, the sensor for needing to be adjusted is determined in the other sensors according to judging result, specifically:
If the back light source brightness detection data of the sensor of interest and the other sensors is all larger than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest and the other sensors is respectively less than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest is greater than the average value, the back of the other sensors
Light-source brightness detection data is less than the average value, it is determined that the other sensors do not need to be adjusted；
If the back light source brightness detection data of the sensor of interest is less than the average value, the back of the other sensors
Light-source brightness detection data is greater than the average value, it is determined that the other sensors do not need to be adjusted.
Preferably, the LED in the sensor neighborhood to be adjusted is adjusted, specifically:
Using the difference of the back light source brightness detection data of the sensor to be adjusted and the average value as described wait adjust
The preliminary adjustment value of whole sensor；
It is respectively each LED setting brightness adjustment in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value
Value；
The brightness of each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value so that it is described to
The difference between the sensor back light source brightness detection data exported after the adjustment and the average value is adjusted no more than preset
Second threshold.
Preferably, according to the preliminary adjustment value be respectively in the neighborhood of the sensor to be adjusted each LED setting it is bright
Adjusted value is spent, specifically:
Determine the distance between each LED in the sensor to be adjusted and the neighborhood；
Determine that each LED is relative to the preliminary adjustment value in the neighborhood of the sensor of interest respectively according to the distance
The adjusted value for needing to adjust, using the adjusted value as the brightness adjustment value.
In addition, present invention also provides a kind of display device, including backlight module, the backlight unit are uniformly provided with
Multiple sensors, the display device further include:
Module is obtained, the back light source brightness detection data of each sensor is obtained, and determines all back light source brightness inspections
The average value and mean square deviation of measured data；
Judgment module, judges whether the mean square deviation is greater than preset first threshold, and is not more than institute in the mean square deviation
Indicate that the acquisition module reacquires the back light source brightness of each sensor after preset time period when stating first threshold
Detection data；
Module is adjusted, when the mean square deviation is greater than the first threshold, determines each back light source brightness detection data
With the absolute difference between the average value, by sensing belonging to the corresponding back light source brightness detection data of maximum absolute difference
Device is as sensor of interest, and according to the sensor of interest and the back of the other sensors adjacent with the sensor of interest
Light-source brightness detection data carries out back light source brightness adjustment.
Preferably, the adjustment module specifically includes:
Submodule is selected, the successively comparative selection sensor from the other sensors；
Judging submodule judges the back light source brightness testing number of the sensor of interest and the comparison sensor respectively
According to whether greater than the average value；
It determines submodule, determines the sensor for needing to be adjusted in the other sensors according to judging result, and
The sensor that the sensor of interest and the needs are adjusted is as sensor to be adjusted；
Adjusting submodule is adjusted the LED in the neighborhood of the sensor to be adjusted, the LED in the neighborhood with
The distance of the sensor to be adjusted is less than the distance between the sensor of interest and the other sensors.
Preferably, the determining submodule is specifically used for:
If the back light source brightness detection data of the sensor of interest and the other sensors is all larger than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest and the other sensors is respectively less than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest is greater than the average value, the back of the other sensors
Light-source brightness detection data is less than the average value, it is determined that the other sensors do not need to be adjusted；
If the back light source brightness detection data of the sensor of interest is less than the average value, the back of the other sensors
Light-source brightness detection data is greater than the average value, it is determined that the other sensors do not need to be adjusted.
Preferably, the adjusting submodule is specifically used for:
Using the difference of the back light source brightness detection data of the sensor to be adjusted and the average value as described wait adjust
The preliminary adjustment value of whole sensor；
It is respectively each LED setting brightness adjustment in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value
Value；
The brightness of each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value so that it is described to
The difference between the sensor back light source brightness detection data exported after the adjustment and the average value is adjusted no more than preset
Second threshold.
Preferably, the adjusting submodule is respectively in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value
Brightness adjustment value is arranged in each LED, specifically:
Determine the distance between each LED in the sensor to be adjusted and the neighborhood；
Determine that each LED is relative to the preliminary adjustment value in the neighborhood of the sensor of interest respectively according to the distance
The adjusted value for needing to adjust, using the adjusted value as the brightness adjustment value.
Compared with prior art, the advantageous effects for the technical solution that the embodiment of the present application is proposed include:
By being uniformly arranged multiple sensors in backlight of display device module internal, the back light source brightness of each sensor is obtained
Detection data, and determine the average value and mean square deviation of all back light source brightness detection datas, and be greater than the first threshold in mean square deviation
The absolute difference between each back light source brightness detection data and average value is determined when value, by the corresponding backlight of maximum absolute difference
Sensor belonging to source brightness detection data is as sensor of interest, and according to sensor of interest and adjacent with sensor of interest
Other sensors back light source brightness detection data carry out back light source brightness adjustment.So as to for showing screen backlight
The uniformity of display screen intensity is remained under the demanding application scenarios of brightness uniformity.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of the technical solution of the application
It is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow diagram for screen brightness regulation method that the application proposes；
Fig. 2 is sensor distribution mode schematic diagram in backlight module a kind of in the application preferred embodiment；
Fig. 3 is a kind of structural schematic diagram of display device in the application preferred embodiment；
Fig. 4 is a kind of method of adjustment flow diagram of LED screen brightness in the application preferred embodiment；
Fig. 5 is that sensor adjacent with X1 in the application concrete application scene does not need the case where being adjusted；
Fig. 6 is in the application concrete application scene for being located at the case where LED of marginal position is adjusted；
Fig. 7 is the structural schematic diagram that a kind of screen intensity that the application proposes adjusts equipment.
Specific embodiment
The problem of in view of being previously mentioned in the application background technique, for show screen backlight illumination uniformity and
In the higher situation of stability requirement, existing technical solution is it is difficult to ensure that LCD screen brightness remains uniform and stable.It is right
This this application provides a kind of method of adjustment of screen intensity, applied to include multiple sensors backlight module in, it is multiple
Sensor is uniformly arranged on the multiple and different position of backlight module.It acquired in real time by sensor, analyze brightness detection data, moved
State adjusts the display brightness of screen different location, makes the more uniform stabilization of the brightness of entire screen, can effectively improve display screen
The uniformity and stability of curtain brightness.
As shown in Figure 1, a kind of process of the method for the holding LCD screen brightness uniformity proposed by the embodiment of the present application
Schematic diagram specifically includes:
Step S101 obtains the back light source brightness detection data of each sensor, and determines all back light source brightness inspections
The average value and mean square deviation of measured data.
In order to keep the uniformity of LCD screen brightness, the application is each firstly the need of the backlight module for display device
The back light source brightness data at position are obtained, this writing sensor is evenly distributed on multiple and different positions of backlight module, often
A position is correspondingly arranged on a sensor, and multiple and different positions of the backlight module are correspondingly provided with multiple sensors.
In the particular embodiment, the distribution mode of the sensor can be distribution mode as shown in Figure 2.It is showing
When equipment is started to work, the sensor for being evenly distributed on the backlight unit obtains the multiple and different positions of backlight module
Back light source brightness detection data, brightness adjustment of the back light source brightness detection data got for after provide data support,
It whether there is in multiple positions for judging current backlight mould group and need the position being adjusted and needing to be adjusted
When, calculate the adjusted value that different parts need to adjust.
It should be noted that sensor distribution mode shown in Fig. 2 is only the preferred embodiment of the application, it is based on
The sensitivity and detection range of sensor, those skilled in the art may be implemented it is a variety of be evenly arranged detection scheme, these are all
Belong to the protection scope of the application.
Step S102, judges whether the mean square deviation is greater than preset first threshold.
The brightness detection data that the step is got according to the sensor for being evenly distributed on each position of the backlight module
Detected value calculates the average value of each location detection data and the mean square deviation of detection data, judges the detection data
Mean square deviation whether be greater than preset first threshold value.The first threshold is for characterizing whether the current brightness uniformity of display device is located
Within work tolerance interval, specific numerical value can be configured by technical staff according to practical application scene, these all belong to
In the protection scope of the application.
Step 103, if the mean square deviation is greater than the first threshold, each back light source brightness detection data and institute are determined
The absolute difference between average value is stated, sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference is made
For sensor of interest, and according to the sensor of interest and the backlight of the other sensors adjacent with the sensor of interest
Brightness detection data carries out back light source brightness adjustment.
Since the specific detected value of the back light source brightness of some sensor detected in backlight module is by position around
The influence of brightness, so the brightness and its periphery adjacent regions at position to be adjusted are needed while adjusted when carrying out brightness adjustment
Brightness.Before LED luminance is adjusted inside to sensor corresponding part, first have to determine the portion for needing to be adjusted
Position, then the sensor of interest is the sensor to be adjusted for centainly needing to be adjusted after determining sensor of interest.
Therefore in a preferred embodiment of the present application, the detailed process of the step is as follows:
Step a) successively comparative selection sensor from the other sensors.
Step b) judges that the back light source brightness detection data of the sensor of interest and the comparison sensor is respectively
It is no to be greater than the average value.
Step c) determines the sensor for needing to be adjusted according to judging result in the other sensors, and will be described
The sensor that sensor of interest and the needs are adjusted is as sensor to be adjusted.
By the step, determine whether that there is also need to be adjusted in the sensor adjacent with sensor of interest
Sensor to be adjusted, specifically can there are several types of situations:
1), the back light source brightness detection data of sensor of interest and other sensors is all larger than average value；
If the back light source brightness detection data of sensor of interest and adjacent other sensors is all larger than average value, by it
The sensor to be adjusted that his sensor is adjusted as needs, with sensor of interest together as sensor to be adjusted to the two
The brightness of the LED of corresponding part is adjusted separately.
2), the back light source brightness detection data of sensor of interest and other sensors is all larger than average value
If the back light source brightness detection data of sensor of interest and adjacent other sensors is respectively less than average value, by it
The sensor to be adjusted that his sensor is adjusted as needs, with sensor of interest together as sensor to be adjusted to the two
The brightness of the LED of corresponding part is adjusted separately.
3), the back light source brightness detection data of sensor of interest is greater than average value, and the back light source brightness of other sensors is examined
Measured data is less than average value
If the back light source brightness detection data of sensor of interest is greater than average value, the backlight of adjacent other sensors
Brightness detection data is less than average value, it is determined that other sensors do not need to be adjusted, and only sensor of interest is to need at this time
The sensor to be adjusted to be adjusted, so only adjusting the brightness of the LED of sensor of interest corresponding part.
4), the back light source brightness detection data of sensor of interest is less than average value, and the back light source brightness of other sensors is examined
Measured data is greater than average value
If the back light source brightness detection data of sensor of interest is less than average value, the back light source brightness of other sensors is detected
Data be greater than average value, it is determined that the sensor does not need to be adjusted, with it is above-mentioned 3) in situation, at this time only target pass
Sensor is the sensor to be adjusted for needing to be adjusted, so only adjusting the brightness of the LED of sensor of interest corresponding part.
Step d) is adjusted the LED in the neighborhood of the sensor to be adjusted, the LED in the neighborhood and it is described to
The distance for adjusting sensor is less than the distance between the sensor of interest and the other sensors.
After determining to need the sensor that is adjusted, which determines sensor of interest and adjacent thereto respectively
Other sensors neighborhood in LED need the adjusted value that adjusts, specifically, being carried out for the LED in sensor of interest neighborhood bright
When degree adjustment, the detected value of the brightness detection data at the position to be adjusted that can be got according to sensor and multiple location detections
The difference of the average value of data determines that the respective sensor detected value in position to be adjusted needs adjusted value.The application's
In preferred embodiment, detailed process is as follows:
(1) using the difference of the back light source brightness detection data of the sensor to be adjusted and the average value as described in
Adjust the preliminary adjustment value of sensor；
It (2) is respectively each LED setting brightness tune in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value
Whole value；
Specifically, which determines the distance between each LED in the sensor to be adjusted and the neighborhood first, with
Determine the adjustment that each LED needs to adjust relative to preliminary adjustment value in the neighborhood of sensor of interest respectively further according to distance afterwards
Value, using adjusted value as the brightness adjustment value.
(3) brightness that each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value, so that described
Difference between the back light source brightness detection data that sensor to be adjusted exports after the adjustment and the average value is no more than default
Second threshold.
It is emphasized that second threshold noted here is that those skilled in the art determine according to specific usage scenario
Fixed, there is no specific limitations.It meanwhile how to be respectively in the sensor neighborhood to be adjusted according to the preliminary adjustment value
The method that a brightness adjustment value is arranged in each LED is identical as the method for brightness in adjustment sensor of interest neighborhood, herein just not
It repeats again.
For by the display device in concrete application scene and its corresponding to backlight module, it is assumed that each position of backlight module
The average value of detection data is 300nit, and the detected value for the position sensor of interest to be adjusted being calculated is 280nit, then should
The corresponding sensor detected value in position to be adjusted should be adjusted to 300nit, then the preliminary adjustment value for needing to be adjusted is
20nit。
When the technical solution of application the application is adjusted the LED in sensor of interest neighborhood, each LED phase
The adjusted value of preliminary adjustment value is needed to be determined according to the distance between each LED and the sensor of interest.It needs first
Determine the distance between position to be adjusted and each adjacent regions, later using distance as weight, weighted calculation goes out each portion
Position needs the adjusted value adjusted relative to position to be adjusted.Specifically, formula can be passed through:To calculate, wherein △ is the tune that each LED needs to adjust relative to preliminary adjustment value
Whole value；W is preliminary adjustment value；D is the distance between each LED and sensor of interest.According to the preliminary adjustment value determined with
And each LED needs the adjusted value adjusted to carry out brightness adjustment to the region near sensor of interest relative to preliminary adjustment value.
It should be noted that the formula used here is a kind of preferred calculation method in specifically used scene, and
Do not influence original technical solution of the invention, it is any can reach all should belong to this hair with the scheme of the present embodiment same effect
Bright protection scope.
By above-mentioned adjustment mode, LED in the sensor of interest and adjacent other sensors neighborhood is adjusted separately
Brightness stops adjustment after the detected value average value to make the back light source brightness detection data of the sensor of interest.It
The sensor reacquires the brightness detection data at each position of backlight module afterwards, and the completion that repeats the above steps is for other needs
The position for carrying out brightness adjustment carries out corresponding brightness adjustment.
S104 reacquires each biography if the mean square deviation is not more than the first threshold after preset time period
The back light source brightness detection data of sensor.
In a preferred embodiment of the present application, if the mean square deviation of detection data is greater than preset threshold value, according to each biography
The detected value of the back light source brightness monitoring data of sensor determines the absolute difference between the detected value and the average value of detection data
Value, and the position where the corresponding sensor of the determining maximum detection data of absolute difference needs preferentially to be adjusted, by the biography
Sensor is set as sensor of interest, while needing to select in the sensor adjacent with the sensor of interest to be adjusted
Whole sensor.If mean square deviation is less than preset threshold value, it was demonstrated that the screen under current state does not need to carry out the adjustment of brightness,
The brightness data that sensor reacquires the multiple positions of backlight module judges whether to need to carry out brightness adjustment, ensures liquid crystal with this
The uniform implementations of screen intensity constantly can be detected and be adjusted, to guarantee the whole uniform of LCD screen brightness
Property.
It can be seen that the technical solution by applying the application, by being uniformly arranged in backlight of display device module internal
Multiple sensors obtain the back light source brightness detection data of each sensor, and determine the flat of all back light source brightness detection datas
Mean value and mean square deviation, and determined between each back light source brightness detection data and average value when mean square deviation is greater than first threshold
Absolute difference, using sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference as sensor of interest,
And backlight is carried out according to the back light source brightness detection data of sensor of interest and the other sensors adjacent with sensor of interest
Source brightness adjustment.So as to remain display under the application scenarios high for display screen backlight illumination uniformity requirement
The uniformity of screen intensity.
For the technical idea that the present invention is further explained, now in conjunction with specific application scenarios, to technical side of the invention
Case is illustrated.
As shown in figure 3, for a kind of structural schematic diagram of display device in the application preferred embodiment, the display device packet
Include: sensor detection module, data processing module and LED adjustment module, each module acts on as follows in the display device:
Sensor detection module: by installing multiple backlight sensors on backlight module, real-time detection backlight module is each
The brightness of a position；
Data processing module: the module is according to the readings of sensor, it is determined whether the backlight for needing to adjust corresponding position, when
When needing to adjust backlight, the numerical value for needing to adjust is calculated；
LED adjusts module: according to the processing result in data processing module, adjusting the LED luminance of corresponding position, makes everybody
The brightness set keeps uniform stabilization.
As shown in figure 4, being completed by sensor for one kind proposed in this preferred embodiment to backlight module brightness
The method schematic diagram of adjustment, which is applied in display device as shown in Figure 3, specific as follows:
By taking 5 sensors as an example, if detecting X1, the value of X2, X3, this 5 sensors of X4, X5 are respectively 335nit,
293nit, 315nit, 302nit, 280nit.
Step S401: using multiple sensor real-time detection backlights, records detected value.
Step S402: judge that each detected value is shown in whether mean square deviation difference is greater than T1.Specifically, can according to detection the data obtained
To calculate the average value M1 of 5 sensor detection datas as 305, mean square deviation is Δ 1=(335-305) 2+ (293-305) 2+
(315-305) 2+ (302-305) 2+ (280-305) 2=1778 is greater than threshold value T1, and brightness uniformity is unsatisfactory for requiring, therefore needs
Backlight is adjusted.
Step S403: the LED adjustment amount of sensor proximity all directions is calculated according to preset algorithm.Specifically, it is determining with it is flat
The maximum sensor position of mean value difference, to determine the LED for specifically needing to adjust.Due to the detected value and average value of the position X1
Difference is maximum, is 30nit, therefore the LED of X1 sensor proximity is preferentially adjusted, the distance between X1 and X2 are between 8, X1 and X4
Distance be the distance between 6, X1 and X3 value be 5.According to distance weighted calculating and the immediate sensor of X1 brightness.X3 and X1
Brightness absolute difference is | 335-315 |/5=4, X4 be with X1 brightness absolute difference | and 335-302 |/6=5.5, therefore X1 and X3
Between LED adjusted value it is maximum.
Step S404: according to the brightness of different step-lengths adjustment all directions LED.
Specifically, as shown in figure 5, the LED between the two sensors should all because X1 and X3 are both greater than average value
The adjustment, and the value of X4 is less than average value, therefore the LED in X4 neighborhood should not be adjusted, the radius of neighborhood is not more than X3 and X4
The distance between.
As shown in fig. 6, tri- LED of a2, a4 are only adjacent with X1, and directly affect X1 surrounding brightness due to a1, therefore it is arranged
Biggish step-length adjusts these three LED luminances, and the sensor that other needs adjust is then according to the weight of distance with different steps
Long adjustment stops adjustment when adjusting to X1 detected value is average value M1
Based on the above method, by the brightness at multiple each positions of sensor real-time detection backlight module, and targetedly
Adjustment needs to carry out the position of brightness regulation, becomes the difference of each backlight sensor detected value within an acceptable error range
It is dynamic, to effectively raise the uniformity and stability of backlight module brightness.
The technical solution and traditional infrared sweeping scheme that the embodiment of the present application is proposed compare, and biggest advantage is: logical
It crosses and the detection data received is obtained and analyzed in real time, determine the part for needing to adjust and specific tune
Whole value, targetedly, dynamically adjusts the brightness of display screen each section, to effectively raise display screen intensity
Uniformity and stability can satisfy some occasions more demanding for display screen backlight illumination.
It should be noted that above-mentioned specific embodiment only represents a kind of specific implement scene, this can not be represented
The scheme of invention is only restricted in this, anyone skilled in the art without creative work it is conceivable that it is excellent
Change scheme should all fall into the protection scope of the present embodiment.
To be illustrated more clearly that scheme that the application previous embodiment provides, it is based on invention structure same as the above method
To think, the embodiment of the present application also proposed a kind of display device, as shown in fig. 7, the display device includes backlight module 710, it is described
Backlight unit is uniformly provided with multiple sensors, the display device further include:
Module 720 is obtained, obtains the back light source brightness detection data of each sensor, and determine all back light source brightness
The average value and mean square deviation of detection data；
Judgment module 730, judges whether the mean square deviation is greater than preset first threshold, and is not more than in the mean square deviation
The backlight for indicating that the acquisition module reacquires each sensor after preset time period when the first threshold is bright
Spend detection data；
Module 740 is adjusted, when the mean square deviation is greater than the first threshold, determines each back light source brightness testing number
According to the absolute difference between the average value, by biography belonging to the corresponding back light source brightness detection data of maximum absolute difference
Sensor is as sensor of interest, and according to the sensor of interest and the other sensors adjacent with the sensor of interest
Back light source brightness detection data carries out back light source brightness adjustment.
In specific application scenarios, the adjustment module is specifically included:
Submodule is selected, the successively comparative selection sensor from the other sensors；
Judging submodule judges the back light source brightness testing number of the sensor of interest and the comparison sensor respectively
According to whether greater than the average value；
It determines submodule, determines the sensor for needing to be adjusted in the other sensors according to judging result, and
The sensor that the sensor of interest and the needs are adjusted is as sensor to be adjusted；
Adjusting submodule is adjusted the LED in the neighborhood of the sensor to be adjusted, the LED in the neighborhood with
The distance of the sensor to be adjusted is less than the distance between the sensor of interest and the other sensors.
In specific application scenarios, the determining submodule is specifically used for:
If the back light source brightness detection data of the sensor of interest and the other sensors is all larger than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest and the other sensors is respectively less than described average
Value, the sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest is greater than the average value, the back of the other sensors
Light-source brightness detection data is less than the average value, it is determined that the other sensors do not need to be adjusted；
If the back light source brightness detection data of the sensor of interest is less than the average value, the back of the other sensors
Light-source brightness detection data is greater than the average value, it is determined that the other sensors do not need to be adjusted.
In specific application scenarios, the adjusting submodule is specifically used for:
Using the difference of the back light source brightness detection data of the sensor to be adjusted and the average value as described wait adjust
The preliminary adjustment value of whole sensor；
It is respectively each LED setting brightness adjustment in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value
Value；
The brightness of each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value so that it is described to
The difference between the sensor back light source brightness detection data exported after the adjustment and the average value is adjusted no more than preset
Second threshold.
In specific application scenarios, the adjusting submodule is respectively the biography to be adjusted according to the preliminary adjustment value
Brightness adjustment value is arranged in each LED in the neighborhood of sensor, specifically:
Determine the distance between each LED in the sensor to be adjusted and the neighborhood；
Determine that each LED is relative to the preliminary adjustment value in the neighborhood of the sensor of interest respectively according to the distance
The adjusted value for needing to adjust, using the adjusted value as the brightness adjustment value.
By the technical solution of application the application, by being uniformly arranged multiple sensings in backlight of display device module internal
Device, obtains the back light source brightness detection data of each sensor, and determine all back light source brightness detection datas average value and
Mean square deviation, and absolute difference between each back light source brightness detection data and average value is determined when mean square deviation is greater than first threshold
Value, using sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference as sensor of interest, and according to
The back light source brightness detection data of sensor of interest and the other sensors adjacent with sensor of interest carries out back light source brightness
Adjustment.So as to remain that display screen is bright under the application scenarios high for display screen backlight illumination uniformity requirement
The uniformity of degree.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also be added to realize by software.Based on this understanding, this hair
Bright technical solution can be embodied in the form of software products, which can store in a non-volatile memories
In medium (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are used so that a computer equipment (can be
Personal computer, server or network equipment etc.) execute method described in each implement scene of the present invention.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Aforementioned present invention serial number is for illustration only, does not represent the superiority and inferiority of implement scene.
Disclosed above is only several specific implementation scenes of the invention, and still, the present invention is not limited to this, Ren Heben
What the technical staff in field can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of method for keeping LCD screen brightness uniformity, applied to the display device including backlight module, which is characterized in that
The backlight unit is uniformly provided with multiple sensors, this method comprises:
The back light source brightness detection data of each sensor is obtained, and determines the average value of all back light source brightness detection datas
And mean square deviation；
Judge whether the mean square deviation is greater than preset first threshold；
If the mean square deviation is greater than the first threshold, determine between each back light source brightness detection data and the average value
Absolute difference, using sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference as target sense
Device, and according to the sensor of interest and the back light source brightness testing number of the other sensors adjacent with the sensor of interest
According to progress back light source brightness adjustment；
If the mean square deviation is not more than the first threshold, the backlight of each sensor is reacquired after preset time period
Source brightness detection data.
2. the method as described in claim 1, which is characterized in that according to the sensor of interest and with the sensor of interest
The back light source brightness detection data of adjacent other sensors carries out back light source brightness adjustment, specifically:
The successively comparative selection sensor from the other sensors；
It is described to judge whether the sensor of interest and the back light source brightness detection data for comparing sensor are greater than respectively
Average value；
It is determined in the other sensors according to judging result and needs the sensor that is adjusted, and by the sensor of interest
And the sensor that the needs are adjusted is as sensor to be adjusted；
LED in the neighborhood of the sensor to be adjusted is adjusted, the LED in the neighborhood and the sensor to be adjusted
Distance be less than the distance between the sensor of interest and the other sensors.
3. method according to claim 2, which is characterized in that determine needs in the other sensors according to judging result
The sensor being adjusted, specifically:
It, will if the back light source brightness detection data of the sensor of interest and the other sensors is all larger than the average value
The sensor that the other sensors are adjusted as needs；
It, will if the back light source brightness detection data of the sensor of interest and the other sensors is respectively less than the average value
The sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest is greater than the average value, the backlight of the other sensors
Brightness detection data is less than the average value, it is determined that the other sensors do not need to be adjusted；
If the back light source brightness detection data of the sensor of interest is less than the average value, the backlight of the other sensors
Brightness detection data is greater than the average value, it is determined that the other sensors do not need to be adjusted.
4. method according to claim 2, which is characterized in that the LED in the sensor neighborhood to be adjusted is adjusted,
Specifically:
Using the back light source brightness detection data of the sensor to be adjusted and the difference of the average value as the biography to be adjusted
The preliminary adjustment value of sensor；
It is respectively each LED setting brightness adjustment value in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value；
The brightness that each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value, so that described to be adjusted
Difference between the back light source brightness detection data that sensor exports after the adjustment and the average value is not more than preset second
Threshold value.
5. method as claimed in claim 4, which is characterized in that according to the preliminary adjustment value be respectively the sensing to be adjusted
Brightness adjustment value is arranged in each LED in the neighborhood of device, specifically:
Determine the distance between each LED in the sensor to be adjusted and the neighborhood；
Determine that each LED is relative to the preliminary adjustment value needs in the neighborhood of the sensor of interest respectively according to the distance
The adjusted value of adjustment, using the adjusted value as the brightness adjustment value.
6. a kind of display device, including backlight module, which is characterized in that the backlight unit is uniformly provided with multiple sensings
Device, the display device further include:
Module is obtained, obtains the back light source brightness detection data of each sensor, and determine all back light source brightness testing numbers
According to average value and mean square deviation；
Judgment module judges whether the mean square deviation is greater than preset first threshold, and in the mean square deviation no more than described the
Indicate that the acquisition module reacquires the back light source brightness detection of each sensor after preset time period when one threshold value
Data；
Module is adjusted, when the mean square deviation is greater than the first threshold, determines each back light source brightness detection data and institute
The absolute difference between average value is stated, sensor belonging to the corresponding back light source brightness detection data of maximum absolute difference is made
For sensor of interest, and according to the sensor of interest and the backlight of the other sensors adjacent with the sensor of interest
Brightness detection data carries out back light source brightness adjustment.
7. device as claimed in claim 6, which is characterized in that the adjustment module specifically includes:
Submodule is selected, the successively comparative selection sensor from the other sensors；
Judging submodule judges that the back light source brightness detection data of the sensor of interest and the comparison sensor is respectively
It is no to be greater than the average value；
It determines submodule, is determined in the other sensors according to judging result and need the sensor that is adjusted, and by institute
It states sensor of interest and described needs the sensor that is adjusted as sensor to be adjusted；
Adjusting submodule is adjusted the LED in the neighborhood of the sensor to be adjusted, the LED in the neighborhood with it is described
The distance of sensor to be adjusted is less than the distance between the sensor of interest and the other sensors.
8. device as claimed in claim 7, which is characterized in that the determining submodule is specifically used for:
It, will if the back light source brightness detection data of the sensor of interest and the other sensors is all larger than the average value
The sensor that the other sensors are adjusted as needs；
It, will if the back light source brightness detection data of the sensor of interest and the other sensors is respectively less than the average value
The sensor that the other sensors are adjusted as needs；
If the back light source brightness detection data of the sensor of interest is greater than the average value, the backlight of the other sensors
Brightness detection data is less than the average value, it is determined that the other sensors do not need to be adjusted；
If the back light source brightness detection data of the sensor of interest is less than the average value, the backlight of the other sensors
Brightness detection data is greater than the average value, it is determined that the other sensors do not need to be adjusted.
9. device as claimed in claim 7, which is characterized in that the adjusting submodule is specifically used for:
Using the back light source brightness detection data of the sensor to be adjusted and the difference of the average value as the biography to be adjusted
The preliminary adjustment value of sensor；
It is respectively each LED setting brightness adjustment value in the neighborhood of the sensor to be adjusted according to the preliminary adjustment value；
The brightness that each LED in the sensor neighborhood to be adjusted is adjusted according to the brightness adjustment value, so that described to be adjusted
Difference between the back light source brightness detection data that sensor exports after the adjustment and the average value is not more than preset second
Threshold value.
10. device as claimed in claim 9, which is characterized in that the adjusting submodule is distinguished according to the preliminary adjustment value
Brightness adjustment value is arranged in each LED in neighborhood for the sensor to be adjusted, specifically:
Determine the distance between each LED in the sensor to be adjusted and the neighborhood；
Determine that each LED is relative to the preliminary adjustment value needs in the neighborhood of the sensor of interest respectively according to the distance
The adjusted value of adjustment, using the adjusted value as the brightness adjustment value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108877688A (en) | 2017-05-12 | 2018-11-23 | 京东方科技集团股份有限公司 | Backlight brightness control method and device |
| CN106940993B (en) * | 2017-05-23 | 2019-02-05 | 京东方科技集团股份有限公司 | A kind of display bearing calibration and system |
| CN108934099A (en) * | 2017-05-24 | 2018-12-04 | 群光电能科技股份有限公司 | Brightness correcting method |
| CN107452344A (en) | 2017-08-18 | 2017-12-08 | 京东方科技集团股份有限公司 | The adjusting method and device of a kind of backlight |
| CN108389553B (en) | 2018-03-27 | 2021-01-12 | 深圳创维－Rgb电子有限公司 | Backlight control method, apparatus and computer readable storage medium |
| CN109243344A (en) * | 2018-09-14 | 2019-01-18 | 惠科股份有限公司 | Technological fluctuation test method and device |
| CN110996174B (en) * | 2019-12-19 | 2022-04-05 | 深圳市迅雷网络技术有限公司 | Video image quality enhancement method and related equipment thereof |
| CN111442799A (en) * | 2020-03-26 | 2020-07-24 | 西安普特流体控制有限公司 | Transient current monitoring method and multi-channel water hammer detector |
| CN111933082B (en) | 2020-09-03 | 2022-11-29 | 京东方科技集团股份有限公司 | Method for improving low gray scale image quality and display device |
| CN114724520B (en) * | 2022-04-13 | 2024-02-20 | 南京巨鲨显示科技有限公司 | Luminance self-adaptive adjustment method for gray-scale medical image |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Video Technology Co., Ltd Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: HISENSE ELECTRIC Co.,Ltd. |