CN105788562B - The brightness control method and system of a kind of display device - Google Patents
The brightness control method and system of a kind of display device Download PDFInfo
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- CN105788562B CN105788562B CN201410813261.5A CN201410813261A CN105788562B CN 105788562 B CN105788562 B CN 105788562B CN 201410813261 A CN201410813261 A CN 201410813261A CN 105788562 B CN105788562 B CN 105788562B
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Abstract
The invention discloses the brightness control method and system of a kind of display device, by adding multiple LED light arranged in arrays for backlight on the display apparatus in advance, and gather in recorded video the corresponding actual scene brightness value of each each pixel of two field picture in the video；Limit value processing carries out the corresponding actual scene brightness value of each each pixel of two field picture in the video according to pre-set first luminance threshold, and corresponding additional brightness value is calculated according to pre-set second luminance threshold；The average value of the additional brightness value of all pixels point in display area corresponding with each LED light in each two field picture is calculated, calculates the ratio of the average value and the difference of first luminance threshold and the second luminance threshold；The brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio；Beholder is had visual experience more true to nature, possess the display devices such as telecine and function is highlighted, reach display effect true to nature.
Description
Technical field
The present invention relates to the brightness control of the brilliance control technical field of display device, more particularly to a kind of display device
Method and system processed.
Background technology
As the product of display continues to develop and popularizes, more and more displays are appeared in life, and plane is shown
Device such as mobile phone, tablet computer etc., further include TV, cinema system etc. and all apply display.Only passed in display system at present
3 primary colors gray scales of system show that the performance for brightness is just relatively more general, and often in the range of very little, shooting is set display brightness
The brightness range very little of the video obtained during standby recorded video, that is, gray scale 0 ~ 255, but the corresponding actual scene of the video
The brightness range of brightness value is very big, so that video pictures effect is not true to nature, and visual experience is not true to nature.
Therefore, the prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, there is provided the brightness control method and system of a kind of display device, it is intended to
Solve the problems, such as that visual experience is unlifelike in the prior art.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of brightness control method of display device, wherein, comprise the following steps：
A, multiple LED light arranged in arrays for backlight are added on the display apparatus in advance, each LED light is display
Corresponding display area provides backlighting on device, and each each pixel of two field picture in the video is gathered in recorded video
The corresponding actual scene brightness value of point；
B, according to pre-set first luminance threshold to the corresponding reality of each each pixel of two field picture in the video
Scene illumination values carry out limit value processing, and calculate corresponding additional brightness value according to pre-set second luminance threshold；
C, the additional brightness value of all pixels point in display area corresponding with each LED light is calculated in each two field picture
Average value, calculates the ratio of the average value and the difference of first luminance threshold and the second luminance threshold；
D, the brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio.
The brightness control method of the display device, wherein, the step A is specifically included：
A1, add LED light source module on the display apparatus, and the LED light source module includes multiple LED arranged in arrays
Lamp；If the LED light source module includes M rows N row LED light, the display screen of the display device has H rows V row pixels；
Wherein M, N, H, V are positive integer；Then each LED light is corresponded in same position display screen per in the display area of H/M rows V/N row
All pixels point provides extra back lighting；
A2, in recorded video, the corresponding reality of each each pixel of two field picture in the video is gathered by optical sensor
Border scene illumination values.
The brightness control method of the display device, wherein, the step B is specifically included：
B1, when in the video the corresponding actual scene brightness value of each pixel of each two field picture more than the first luminance threshold
When, the actual scene brightness value of the pixel is arranged to the first luminance threshold；Otherwise keep the actual scene of the pixel bright
Angle value is constant；
B2, judge whether the corresponding actual scene brightness value of each pixel of each two field picture after limit value processing is more than in advance
The second luminance threshold set, if it has, then taking its difference as the corresponding additional brightness value of the pixel；If it has not, then volume
Outer brightness value is 0.
The brightness control method of the display device, wherein, the step C is specifically included：
C1, seek the additional brightness value of all pixels point in display area corresponding with each LED light in each two field picture
With, and divided by all pixels point quantity, obtain corresponding average value；
C2, the difference for calculating first luminance threshold and the second luminance threshold, and by the average value and the difference
Do and compare, obtain corresponding ratio.
The brightness control method of the display device, wherein, the step D is specifically included：
D1, using the ratio as the brightness of corresponding LED light and the ratio of the LED light high-high brightness, corresponding adjust should
The brightness of LED light.
The brightness control method of the display device, wherein, first luminance threshold is more than the second luminance threshold；And
Second luminance threshold when being picture pick-up device recorded video the corresponding average brightness value of each two field picture and pupil of human it is constant
When to the sum of comfortable limit of brightness value of light；First luminance threshold each two field picture correspondence when being picture pick-up device recorded video
The sum of the uncomfortable limit of brightness value born of average brightness value and human eye.
A kind of brightness control system of display device, wherein, including：
Module is pre-set, for adding multiple LED light arranged in arrays for backlight on the display apparatus in advance,
Each LED light provides backlighting for for corresponding display area in display device, and is gathered in recorded video in the video
The corresponding actual scene brightness value of each each pixel of two field picture；
Additional brightness value acquisition module, for according to pre-set first luminance threshold to each frame figure in the video
As the corresponding actual scene brightness value progress limit value processing of each pixel, and according to the calculating pair of pre-set second luminance threshold
The additional brightness value answered；
Brighteness ratio acquisition module, owns for calculating in each two field picture in display area corresponding with each LED light
The average value of the additional brightness value of pixel, calculates the difference of the average value and first luminance threshold and the second luminance threshold
The ratio of value；
Luminance adjustment module, the brightness of the corresponding LED light in the display area is adjusted for being corresponded to according to the ratio.
The brightness control system of the display device, wherein, the module that pre-sets includes：
Backlight illuminating unit, for adding LED light source module on the display apparatus, it is in square that the LED light source module, which includes,
Multiple LED light of battle array arrangement；If the LED light source module includes M rows N row LED light, the display screen of the display device has
H rows V row pixels；Wherein M, N, H, V are positive integer；Then each LED light is corresponded in same position display screen per H/M rows V/
All pixels point provides extra back lighting in the display area of N row；
Actual scene brightness value collecting unit, in recorded video, being gathered by optical sensor every in the video
The corresponding actual scene brightness value of each pixel of one two field picture.
The brightness control system of the display device, wherein, the additional brightness value acquisition module includes：
Limit value processing unit, for when in the video the corresponding actual scene brightness value of each pixel of each two field picture surpass
When crossing the first luminance threshold, the actual scene brightness value of the pixel is arranged to the first luminance threshold；Otherwise the pixel is kept
The actual scene brightness value of point is constant；
Additional brightness value computing unit, for judge limit value processing after the corresponding actual field of each pixel of each two field picture
Whether scape brightness value is more than pre-set second luminance threshold, if it has, then taking its difference as the corresponding volume of the pixel
Outer brightness value；If it has not, then additional brightness value is 0.
The brightness control system of the display device, wherein, the brighteness ratio acquisition module includes：
Average calculation unit, for by all pixels in display area corresponding with each LED light in each two field picture
Point additional brightness value summation, and divided by all pixels point quantity, obtain corresponding average value；
Computation unit, for calculating the difference of first luminance threshold and the second luminance threshold, and will be described flat
Average is done with the difference to be compared, and obtains corresponding ratio.
The brightness control method and system of a kind of display device provided by the present invention, efficiently solve in the prior art
The unlifelike problem of visual experience, by adding multiple LED light arranged in arrays for backlight on the display apparatus in advance,
Each LED light provides backlighting for for corresponding display area in display device, and is gathered in recorded video in the video
The corresponding actual scene brightness value of each each pixel of two field picture；According to pre-set first luminance threshold in the video
The corresponding actual scene brightness value of each each pixel of two field picture carries out limit value processing, and according to pre-set second luminance threshold
Value calculates corresponding additional brightness value；Calculate in each two field picture all pixels point in display area corresponding with each LED light
Additional brightness value average value, calculate the ratio of the difference of the average value and first luminance threshold and the second luminance threshold
Rate；The brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio；According to the reality of each two field picture in video
Backlight light outside the scene illumination values quota of border, has haveed the function that to show high brightness, beholder is had vision more true to nature
Impression, possesses the display devices such as telecine and function is highlighted, reach display effect true to nature, brought greatly to user
Big convenience.
Brief description of the drawings
Fig. 1 is the flow chart of the brightness control method preferred embodiment of display device provided by the invention.
Fig. 2 be display device provided by the invention brightness control method in LED light arrangement schematic diagram.
Fig. 3 is the structure diagram of the brightness control system Application Example of display device provided by the invention.
Embodiment
The present invention provides a kind of brightness control method and system of display device, to make the purpose of the present invention, technical solution
And advantage is clearer, clear and definite, the present invention is described in more detail for the embodiment that develops simultaneously referring to the drawings.It should be appreciated that this
Locate described specific embodiment only to explain the present invention, be not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 is the flow chart of the brightness control method preferred embodiment of display device provided by the invention,
As shown in the figure, it the described method comprises the following steps：
Step S100, multiple LED light arranged in arrays for backlight, each LED are added on the display apparatus in advance
Lamp provides backlighting for for corresponding display area in display device, and each frame figure in the video is gathered in recorded video
As the corresponding actual scene brightness value of each pixel；
Step S200, each pixel of each two field picture in the video is corresponded to according to pre-set first luminance threshold
Actual scene brightness value carry out limit value processing, and corresponding additional brightness is calculated according to pre-set second luminance threshold
Value；
Step S300, the extra of all pixels point in display area corresponding with each LED light is calculated in each two field picture
The average value of brightness value, calculates the ratio of the average value and the difference of first luminance threshold and the second luminance threshold；
Step S400, the brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio.
Above-mentioned steps are described in detail with reference to specific embodiment.
In the step s 100, multiple LED light arranged in arrays for backlight are added on the display apparatus in advance, each
LED light provides backlighting for for corresponding display area in display device, and gathers in recorded video each in the video
The corresponding actual scene brightness value of each pixel of two field picture.
Specifically, display device includes TV, liquid crystal display etc..The present invention increases at the rear of these display devices
Multiple high-brightness LED lamps of distribution, so as to provide extra back lighting.The arranged distributions of multiple LED light as shown in Fig. 2,
Increase multiple LED light 110 arranged in arrays in display device 100.It is corresponding on the display screen of whole display device uniformly to divide
Portion arranges, and the brightness light and shade of each LED light can be controlled to change respectively.The brilliance control of namely single lamp 0-100%.And the LED
Lamp is generally white light.Since display device includes multiple classification, after multiple light can be placed in liquid crystal surface version by traditional monitor
Face, if the projector equipment of film can will can control the lamp of basic colors（Or it can be made of redgreenblue lamp）It is placed in curtain
Position, lampshade make of astigmatism translucent cover, and projection when can reflect image, can be opened when highlighted behind
Lamp and adjust color and be highlighted for auxiliary.And each each pixel of two field picture in the video is gathered in recorded video
Corresponding actual scene brightness value, can be specifically acquired by optical sensor, can also be sensed by other ambient brightness and set
It is standby to be acquired.In practical application, can be according to video capture or making when the additional brightness data that are synchronously taken into, this data and
Pixel is shot to correspond to, but can also be fewer than pixel quantity, it is specially that a numerical value represents respective cell block additional brightness value.
Further, the step S100 is specifically included：
S110, add LED light source module on the display apparatus, and the LED light source module includes arranged in arrays multiple
LED light；If the LED light source module includes M rows N row LED light, the display screen of the display device has H rows V row pixels
Point；Wherein M, N, H, V are positive integer；Then each LED light is corresponded in same position display screen per the viewing area of H/M rows V/N row
All pixels point provides extra back lighting in domain；
S120, in recorded video, it is corresponding that each each pixel of two field picture in the video is gathered by optical sensor
Actual scene brightness value.
Specifically, if backlight high-brightness LED lamp is distributed as M rows N row, the display screen of display device has H rows V row pixels
Point, then the display area correspondence of LED light and display screen is that each LED light is corresponded in same position display screen per H/M
All pixels point provides extra back lighting in the display area of row V/N row.Please continue to refer to Fig. 2, that is to say, that each LED
Rectangular area of the corresponding display area of lamp for a length of H/M wide centered on the LED light on a display screen for V/N.Each LED
Lamp provides extra back lighting for the rectangular area in same position display screen.It should be noted that M and N be far smaller than H and
V, this is LED light number and pixel number.
And in advance in recorded video, while gather the corresponding actual field of each each pixel of two field picture in the video
Scape brightness value.
In step s 200, according to pre-set first luminance threshold to each each pixel of two field picture in the video
Corresponding actual scene brightness value carries out limit value processing, and corresponding extra bright according to the calculating of pre-set second luminance threshold
Angle value.
Specifically, in order to avoid actual scene brightness value is excessive, human eye is damaged, therefore passes through the first luminance threshold
Value has carried out limit value processing to the corresponding actual scene brightness value of each each pixel of two field picture in the video.Specifically,
It is exactly when the corresponding actual scene brightness value of each pixel of each two field picture is more than the first luminance threshold in the video, by this
The actual scene brightness value of pixel is arranged to the first luminance threshold；Otherwise the actual scene brightness value of the pixel is kept not
Become.
Then the present invention is in original picture pick-up device recorded video on the basis of the brightness value of each two field picture, according to image
Actual scene brightness value increase extra brightness value, if the corresponding actual scene of each each pixel of two field picture in the video
Brightness value is higher than the second luminance threshold, then using its difference as corresponding additional brightness value.Specifically, exactly judge at limit value
Whether the corresponding actual scene brightness value of each pixel of each two field picture after reason is more than pre-set second luminance threshold, if
It is yes, then takes its difference as the corresponding additional brightness value of the pixel；If it has not, then additional brightness value is 0.
In practical application, first luminance threshold is more than the second luminance threshold.
Further, each two field picture corresponding average brightness when second luminance threshold is picture pick-up device recorded video
To the sum of comfortable limit of brightness value of light when value and constant pupil of human；First luminance threshold is picture pick-up device recorded video
When the sum of the uncomfortable limit of brightness value born with human eye of the corresponding average brightness value of each two field picture.
Specifically, the constant comfort limit scope to light of pupil of human is y, that is to say, that to light when pupil of human is constant
Comfortable limit of brightness value be y, the comfort level upper limit of corresponding scene human eye at that time is the second luminance threshold, that is, picture pick-up device
The sum of corresponding average brightness value A and y of each two field picture A+y during recorded video.The uncomfortable brightness range peak that human eye is born
For z, then A+z is high brightness limiting value, i.e. the first luminance threshold, and crossing this brightness human eye too can be not suitable with or damage,
Being highlighted should be（A+y）Arrive（A+z）In the range of.Y and z relations are y<z.So, height is not included to a certain general scene
Brightness content, the average brightness of scene is A at this time.Corresponding camera aperture is adjusted to suitable position（Adapt to average brightness A）, when
Occurs high brightness content such as flame in scene, sun actual scene brightness value when high brightness is X, corresponding highlighted object area
Additional brightness value subtracts the comfortable brightness upper limit for high luminance values, and Lt=X- (A+y), Lt are the former highlighted additional brightness value of certain point.When this
A value should be also any limitation as when being more than the uncomfortable limit, therefore Lo is final high bright values, works as Lt<Lo=Lt during z-y, works as Lt>During z
Lo=z-y.Such 0<Lo<z-y.If actual scene brightness value is not above the comfortable brightness value upper limit, i.e. the second luminance threshold, then
Additional brightness value is 0.
In step S300, all pixels point in display area corresponding with each LED light is calculated in each two field picture
The average value of additional brightness value, calculates the average value and first luminance threshold and the ratio of the difference of the second luminance threshold
Rate.Specifically, it is exactly by the additional brightness of all pixels point in display area corresponding with each LED light in each two field picture
Value summation, and divided by all pixels point quantity, obtain corresponding average value.Then first luminance threshold and second are calculated
The difference of luminance threshold, and the average value is done with the difference and is compared, obtain corresponding ratio.
In practical application, the pixel number that display area is corresponded in each LED light is（H/M）*（V/N）, first is bright
It is z-y to spend threshold value and the difference of the second luminance threshold, obtains corresponding brighteness ratio, its value range is 0 ~ 1.1 representative pair
The LED light answered is most bright at this time, and 0 represents corresponding LED light and closes.
In step S400, the brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio.
Specifically, be exactly using the ratio as the brightness of corresponding LED light and the ratio of the LED light high-high brightness,
The corresponding brightness for adjusting the LED light.It can so realize that the brightness to newly-increased each LED light is bright according to the actual scene of video
Angle value carries out single lamp control.
Further, in order to be kept for the human eye most of the time be in range of normal value.If being highlighted overlong time,
Then since the light adaptation of human eye acts on, it is ineffective to highlight lantern festival.Therefore the dark of general brightness must be recovered after highlighting
Adaptation process.The light adaptation of human eye, dark adaptation are all divided into several stages, and the wherein first stage is Main Stage, the stage below
All it is the gradual process stablized and adapted to, mainly takes the first stage in the present invention.Light adaptation time first stage was at 30 seconds or so.
First stage dark adaptation time was at 5 minutes or so.
According to frame per second, if video display process 60 frame per second in this way, each LED light is folded per control frame signal
Add, be considered as highlighted unlatching if the brightness ratio of this frame some LED light is more than 0, if the brightness ratio of the frame LED light is 0
Then it is considered as highlighted closing, is then overlapped for each frame.Specific superposition value is as follows, highlights and opens+1, highlights closing-(Tl/
Td), Tl is the light adaptation time, and Td is dark adaptation time.It is 30 seconds/5 minutes=1/20 if with above affiliated time value.Citing
Highlighted open and close is as follows：Open, open, close, close, then corresponding highlighted superposition value is 1+1-0.05-0.05.
The light adaptation time of a upper limit value such as human eye is set as 30s, since this time is time for adapting to completely, for
Only do it is a little long for the use that effect is shown, so the light adaptation time for temporarily taking human eye is its half, i.e., exemplified by 15 seconds.Take
Dark adaptation time is 2.5 minutes.
If being highlighted 15 seconds, the highlighted superposition value upper limit in 1*60*15=900 item is 900, if some LED light is superimposed
Value reach 900 explanation human eyes have certain adaptation to it, then behind be highlighted and must weaken, to every frame later
All high bright values of corresponding LED light are multiplied by a coefficient, for example the highlighted needs 2.5 of 15 seconds divide the dark adaptation time planted, and
And highlighted attenuation settings are 15 seconds, then 15 seconds *, 60 frame=900 per second, then coefficient be divided into 900 parts from 1 to 0 and successively decrease, be every time 1/
900.Further need exist for the dark adaptation time of 2.5 minutes.So next frame display high-brightness multiplies after highlighted superposition value reaches the upper limit 900
With 1-1/900, the second vertical frame dimension is bright to be multiplied by coefficient 1-2/900, and to the last coefficient is 0, then all high-brightness LED lamps are closed, and are held
Shut-in time 2.5 minutes continuous.
Then, continue to judge whether be still highlighted in successive image, if the value for being highlighted maximum is more than
Threshold value Llow then still carries out suppression, if in successive image high bright values it is maximum be less than threshold value Llow, then recover to highlight suppression
Effect.Llow is the relatively low value of a numerical value, can also be equal to 0, this purpose is the actual scene brightness value when video image
It is highlighted suppressed, and when subsequent video images are still highlighted, then suppresses still to work, otherwise once closing suppression
System, image can set out highlighted suddenly under the continuous scene of brightness, and display effect is poor.So it must wait until in subsequent video images
Highlighted closing when, then recover highlighted inhibitory action.As described above, high-brightness LED lamp meeting Dynamic Announce, if highlighted continuously reach
Then high-brightness LED lamp can successively decrease a certain degree step by step, then there is the display of a dark adaptation time, then to the additional brightness of video
When data disappear, then recover normally to show.
The brightness control method of the display device of bright light provided by the invention, is closed, human eye in normal display high-brightness LED light
Adapt to；When having highlight regions in the actual scene brightness value of video, high-brightness LED lamp, which corresponds to, to be opened, and human eye occurs uncomfortable.Then
High-brightness LED lamp is closed, and human eye slowly recovers to adapt to dark situation.Due to the brightness of human eye is not suitable with stimulation everywhere can be with nature
Run into, human eye has a set of adjusting method of itself, closes one's eyes, and reduces pupil etc., the high bright light that the present invention can be born using normal person
Stimulate and can reach effect, while people will not be damaged, dark adaptation time human eye is reached uncomfortable stimulation, human eye
Adapt to again be changed over time according to pupil, user is reached visual impact on the spot in person.The invention enables display
System possesses a new viewing impression, i.e. brightness stimulates, at the same can compatible other sensorium such as 3d, water, wind etc., composition
One new cinema experience, or home videos impression.
Based on the brightness control method of above-mentioned display device, the embodiment of the present invention additionally provides a kind of brightness of display device
Control system, as shown in figure 3, the system comprises：
Module 10 is pre-set, for adding multiple LED arranged in arrays for backlight on the display apparatus in advance
Lamp, each LED light provides backlighting for for corresponding display area in display device, and the video is gathered in recorded video
In the corresponding actual scene brightness value of each each pixel of two field picture；Specifically as described in step S100；
Additional brightness value acquisition module 20, for according to pre-set first luminance threshold to each frame in the video
The corresponding actual scene brightness value of each pixel of image carries out limit value processing, and is calculated according to pre-set second luminance threshold
Corresponding additional brightness value, specifically as described in step S200；
Brighteness ratio acquisition module 30, for calculating in each two field picture institute in display area corresponding with each LED light
There is the average value of the additional brightness value of pixel, calculate the average value and first luminance threshold and the second luminance threshold
The ratio of difference, specifically as described in step S300；
Luminance adjustment module 40, the brightness of the corresponding LED light in the display area is adjusted for being corresponded to according to the ratio,
Specifically as described in step S400.
Further, the module 10 that pre-sets includes：
Backlight illuminating unit, for adding LED light source module on the display apparatus, it is in square that the LED light source module, which includes,
Multiple LED light of battle array arrangement；If the LED light source module includes M rows N row LED light, the display screen of the display device has
H rows V row pixels；Wherein M, N, H, V are positive integer；Then each LED light is corresponded in same position display screen per H/M rows V/
All pixels point provides extra back lighting in the display area of N row；
Actual scene brightness value collecting unit, in recorded video, being gathered by optical sensor every in the video
The corresponding actual scene brightness value of each pixel of one two field picture.
Further, the additional brightness value acquisition module 20 includes：
Limit value processing unit, for when in the video the corresponding actual scene brightness value of each pixel of each two field picture surpass
When crossing the first luminance threshold, the actual scene brightness value of the pixel is arranged to the first luminance threshold；Otherwise the pixel is kept
The actual scene brightness value of point is constant；
Additional brightness value computing unit, for judge limit value processing after the corresponding actual field of each pixel of each two field picture
Whether scape brightness value is more than pre-set second luminance threshold, if it has, then taking its difference as the corresponding volume of the pixel
Outer brightness value；If it has not, then additional brightness value is 0.
Further, the brighteness ratio acquisition module 30 includes：
Average calculation unit, for by all pixels in display area corresponding with each LED light in each two field picture
Point additional brightness value summation, and divided by all pixels point quantity, obtain corresponding average value；
Computation unit, for calculating the difference of first luminance threshold and the second luminance threshold, and will be described flat
Average is done with the difference to be compared, and obtains corresponding ratio.
Wherein, first luminance threshold is more than the second luminance threshold；And second luminance threshold is recorded for picture pick-up device
During video processed the corresponding average brightness value of each two field picture and during constant pupil of human to the sum of comfortable limit of brightness value of light；Institute
State the discomfort that the corresponding average brightness value of each two field picture when the first luminance threshold is picture pick-up device recorded video is born with human eye
The sum of limit of brightness value.
Display device of the present invention refers to liquid crystal display, film equipment projection screen, television indicator etc..
In conclusion the brightness control method and system of a kind of display device provided by the invention, by showing in advance
Multiple LED light arranged in arrays for backlight are added on device, each LED light is corresponding display area in display device
Provide backlighting for, and gather in recorded video the corresponding actual scene brightness of each each pixel of two field picture in the video
Value；According to pre-set first luminance threshold to the corresponding actual scene brightness of each each pixel of two field picture in the video
Value carries out limit value processing, and calculates corresponding additional brightness value according to pre-set second luminance threshold；Calculate each frame figure
As in display area corresponding with each LED light the additional brightness value of all pixels point average value, calculate the average value
With first luminance threshold and the ratio of the difference of the second luminance threshold；Corresponded to according to the ratio and adjust the display area
The brightness of corresponding LED light；According to the backlight light outside the actual scene brightness value quota of each two field picture in video, reach
The effect of performance high brightness, makes beholder have visual experience more true to nature, the display devices such as telecine is possessed high brightness
Display function, reaches display effect true to nature, brings to user and greatly facilitates.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of brightness control method of display device, it is characterised in that comprise the following steps：
A, multiple LED light arranged in arrays for backlight are added on the display apparatus in advance, each LED light is display device
Upper corresponding display area provides backlighting for, and each each pixel pair of two field picture in the video is gathered in recorded video
The actual scene brightness value answered；
B, according to pre-set first luminance threshold to the corresponding actual scene of each each pixel of two field picture in the video
Brightness value carries out limit value processing, and calculates corresponding additional brightness value according to pre-set second luminance threshold；
C, being averaged for the additional brightness value of all pixels point in display area corresponding with each LED light is calculated in each two field picture
Value, calculates the ratio of the average value and the difference of first luminance threshold and the second luminance threshold；
D, the brightness for adjusting the corresponding LED light in the display area is corresponded to according to the ratio.
2. the brightness control method of display device according to claim 1, it is characterised in that the step A is specifically included：
A1, add LED light source module on the display apparatus, and the LED light source module includes multiple LED light arranged in arrays；
If the LED light source module includes M rows N row LED light, the display screen of the display device has H rows V row pixels；Its
Middle M, N, H, V are positive integer；Then each LED light corresponds to institute in the display area that every H/M rows V/N is arranged in same position display screen
There is pixel to provide extra back lighting；
A2, in recorded video, the corresponding actual field of each each pixel of two field picture in the video is gathered by optical sensor
Scape brightness value.
3. the brightness control method of display device according to claim 1, it is characterised in that the step B is specifically included：
B1, when the corresponding actual scene brightness value of each pixel of each two field picture is more than the first luminance threshold in the video,
The actual scene brightness value of the pixel is arranged to the first luminance threshold；Otherwise the actual scene brightness value of the pixel is kept
It is constant；
B2, judge limit value processing after the corresponding actual scene brightness value of each pixel of each two field picture whether be more than pre-set
The second luminance threshold, if it has, then taking its difference as the corresponding additional brightness value of the pixel；It is if it has not, then extra bright
Angle value is 0.
4. the brightness control method of display device according to claim 1, it is characterised in that the step C is specifically included：
C1, the additional brightness value summation by all pixels point in display area corresponding with each LED light in each two field picture, and
Divided by the quantity of all pixels point, obtain corresponding average value；
C2, the difference for calculating first luminance threshold and the second luminance threshold, and the average value is done with the difference and is compared,
Obtain corresponding ratio.
5. the brightness control method of display device according to claim 1, it is characterised in that the step D is specifically included：
D1, using the ratio as the brightness of corresponding LED light and the ratio of the LED light high-high brightness, it is corresponding to adjust the LED light
Brightness.
6. the brightness control method of display device according to claim 1, it is characterised in that first luminance threshold is big
In the second luminance threshold；And second luminance threshold each two field picture corresponding average brightness when being picture pick-up device recorded video
To the sum of comfortable limit of brightness value of light when value and constant pupil of human；First luminance threshold is picture pick-up device recorded video
When the sum of the uncomfortable limit of brightness value born with human eye of the corresponding average brightness value of each two field picture.
A kind of 7. brightness control system of display device, it is characterised in that including：
Module is pre-set, for adding multiple LED light arranged in arrays for backlight on the display apparatus in advance, each
LED light provides backlighting for for corresponding display area in display device, and gathers in recorded video each in the video
The corresponding actual scene brightness value of each pixel of two field picture；
Additional brightness value acquisition module, for each to each two field picture in the video according to pre-set first luminance threshold
The corresponding actual scene brightness value of pixel carries out limit value processing, and corresponding according to the calculating of pre-set second luminance threshold
Additional brightness value；
Brighteness ratio acquisition module, for calculating in each two field picture all pixels in display area corresponding with each LED light
The average value of the additional brightness value of point, calculates the average value and the difference of first luminance threshold and the second luminance threshold
Ratio；
Luminance adjustment module, the brightness of the corresponding LED light in the display area is adjusted for being corresponded to according to the ratio.
8. the brightness control system of display device according to claim 7, it is characterised in that described to pre-set module bag
Include：
Backlight illuminating unit, for adding LED light source module on the display apparatus, the LED light source module includes arranging in matrix
Multiple LED light of row；If the LED light source module includes M rows N row LED light, the display screen of the display device has H rows V
Row pixel；Wherein M, N, H, V are positive integer；Then each LED light is corresponded in same position display screen per H/M rows V/N row
Display area in all pixels point extra back lighting is provided；
Actual scene brightness value collecting unit, in recorded video, each frame in the video to be gathered by optical sensor
The corresponding actual scene brightness value of each pixel of image.
9. the brightness control system of display device according to claim 7, it is characterised in that the additional brightness value obtains
Module includes：
Limit value processing unit, for when in the video the corresponding actual scene brightness value of each pixel of each two field picture more than
During one luminance threshold, the actual scene brightness value of the pixel is arranged to the first luminance threshold；Otherwise the pixel is kept
Actual scene brightness value is constant；
Additional brightness value computing unit, for judging that the corresponding actual scene of each pixel of each two field picture after limit value processing is bright
Whether angle value is more than pre-set second luminance threshold, if it has, then taking its difference corresponding extra bright as the pixel
Angle value；If it has not, then additional brightness value is 0.
10. the brightness control system of display device according to claim 7, it is characterised in that the brighteness ratio obtains
Module includes：
Average calculation unit, for by all pixels point in display area corresponding with each LED light in each two field picture
Additional brightness value sum, and divided by all pixels point quantity, obtain corresponding average value；
Computation unit, for calculating the difference of first luminance threshold and the second luminance threshold, and by the average value
Do and compare with the difference, obtain corresponding ratio.
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| 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 |
| TWI672978B (en) * | 2018-05-02 | 2019-09-21 | 奇景光電股份有限公司 | Back light adjusting method and display device for local dimming |
| CN113406076A (en) * | 2018-07-05 | 2021-09-17 | 深圳辉煌耀强科技有限公司 | Smear image acquisition and analysis system |
| CN109272917B (en) * | 2018-10-25 | 2021-09-28 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| CN112382240A (en) * | 2020-10-30 | 2021-02-19 | Oppo广东移动通信有限公司 | Backlight control method and device, electronic equipment and readable storage medium |
| CN113064682A (en) * | 2021-03-11 | 2021-07-02 | 浙江大华技术股份有限公司 | Picture display method and device of display equipment and display equipment |
| CN117915510B (en) * | 2024-01-17 | 2024-09-20 | 扬州华彩光电有限公司 | Control system for constant power output of LED lamp |
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