CN104485069B - A kind of control method of LED display contrast and system - Google Patents
A kind of control method of LED display contrast and system Download PDFInfo
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Abstract
The present invention provides a kind of control method of LED display contrast, including：The gamma table of digital visual interface output is obtained, the gamma table includes bit and its corresponding gray value information；According to the gamma table and default adjustment function, obtain target gamma table, to be adjusted to LED display contrast according to the target gamma table, wherein in the corresponding gamma correction curve of target gamma table, the slope of the first gray portion and the second gray portion is less than the slope of the 3rd gray portion between first gray portion and second gray portion.The present invention also provides a kind of regulating system of LED display contrast.Said method and system can cause LED display to have preferable display effect, the partially dark or partially bright problem of picture overall brightness after effectively solving contrast adjustment.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of light emitting diode (Light Emitting Diode,
LED) control method of display screen and system.
Background technology
Large LED display screen out of doors or interior application more and more extensively, if one piece of display screen have high right
Than degree, this also implies that the display screen has of a relatively high brightness and assumes the gorgeous degree of high color.So, how to have
The contrast that effect ground adjusts screen is extremely important.
Existing screen adjustment system in the contrast adjustment of large LED display screen, be all by common gamma
Or video processor is being adjusted (Gamma).That is, the regulation contrast of general LED display has two ways.One
It is：Sending card carries out Gamma matrix operation to image, and then realizes the regulation of contrast；Two are：By connecting before sending card
Video processor, adjusts the contrast of image by the video processor to realize the regulation of the contrast of the image of display screen.
Both the above mode be all by realizing the regulation of the contrast of the image of display screen to the Gamma of picture adjustment.That is, from aobvious
Card obtains the Gamma data of video card, then draws difference Gamma value calibration curve according to different Gamma values, as shown in figure 1,
Transverse axis is 8bit (bit) output valve (256), and the longitudinal axis is gray value, after the regulation for forward direction in Fig. 1 shown in solid line L1
Gamma curve, (recognizing if the Gamma value after regulation is more than former Gamma value for reverse gamma curve shown in dotted line L2
For being positive regulation, otherwise be then reversely to adjust), shown in solid line L3 for original gamma curve.
Although both the above mode can adjust the contrast of picture, the effect on driving birds is not good for adjusting.This is because existing
Gamma regulation technology, the ratio adjusted for secretly bright Gamma are uneven, and dark ratio is higher than bright ratio, i.e. from Fig. 1
From the point of view of, for example, same gray value, the curve L1 after being adjusted by forward direction, the bit value of its corresponding transverse axis become big, that is, show low
The bit number of ash becomes many, shows that the bit number of high ash tails off, and this dim spot that may result in all pixels point in picture becomes more
Secretly, brightness becomes brighter, and in general while contrast is changed, sacrifices the overall brightness of pixel again, so
The ratio that the whole brightness of image after regulation all becomes is dark in the past, and effect is deteriorated, and there is the partially dark problem of picture overall brightness.Conversely, logical
The curve L2 crossed after reversely adjusting, will have that picture is overall partially bright.
Content of the invention
In view of this, the present invention provides a kind of control method of LED display contrast and system, and LED can be caused to show
Screen has preferable display effect, the partially dark or partially bright problem of picture overall brightness after effectively solving contrast adjustment.
A kind of control method of LED display contrast provided in an embodiment of the present invention, including：
The gamma table of digital visual interface output is obtained, the gamma table includes bit and its corresponding gray value letter
Breath；
According to the gamma table and default adjustment function, target gamma table is obtained, with according to the target gamma table pair
LED display contrast is adjusted, in the corresponding gamma correction curve of wherein described target gamma table the first gray portion and
The slope of the second gray portion is less than the 3rd gray scale portion between first gray portion and second gray portion
The slope for dividing.
A kind of regulating system of LED display contrast provided in an embodiment of the present invention, including：Acquisition module and regulation mould
Block；
The acquisition module, runs on sending card, for obtaining the gamma table of digital visual interface output, the gamma table
Include bit and its corresponding gray value information；
The adjustment module, for the gamma table and the default adjustment function that are obtained according to the acquisition module, obtains
Target gamma table, to be adjusted to LED display contrast, wherein described target gamma table is obtained according to the target gamma table
In corresponding gamma correction curve, the slope of the first gray portion and the second gray portion is less than between first gray portion
And the slope of the 3rd gray portion between second gray portion.
As can be seen from the above technical solutions, the embodiment of the present invention has advantages below：
By the gamma table that exports according to digital visual interface and default adjustment function, target gamma table is obtained, due to
In the corresponding gamma correction curve of target gamma table the slope of the first gray portion and the second gray portion be less than between this
The slope of the 3rd gray portion between one gray portion and second gray portion, then according to the target gamma table to LED
Display screen contrast is adjusted, and dark pixel in image to be shown can be adjusted so as to darker, bright pixel and be adjusted so as to
Brighter, realization is secretly bright to be become apparent from, but the change of the overall brightness of image is less, so as to obtaining more preferable contrast effect so that
LED display has preferable display effect, and after effectively solving contrast adjustment, picture overall brightness is partially dark or partially bright asks
Topic.
It is that the above and other objects, features and advantages of the present invention can be become apparent, preferred embodiment cited below particularly,
And coordinate institute's accompanying drawings, it is described in detail below.
Description of the drawings
Fig. 1 is the schematic diagram of gamma correction curve in prior art.
Fig. 2 be a kind of LED display contrast provided in an embodiment of the present invention control method in target gamma table correspond to
Gamma correction curve schematic diagram.
A kind of flow chart of the control method of LED display contrast that Fig. 3 is provided for first embodiment of the invention.
A kind of flow chart of the method for LED display contrast that Fig. 4 is provided for second embodiment of the invention.
A kind of flow chart of the control method of LED display contrast that Fig. 5 is provided for third embodiment of the invention.
A kind of structural representation of the regulating system of LED display contrast that Fig. 6 is provided for fourth embodiment of the invention.
A kind of structural representation of the regulating system of LED display contrast that Fig. 7 is provided for fifth embodiment of the invention.
Specific embodiment
For further illustrating that the present invention is to realize technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to the specific embodiment according to the present invention, structure, feature and its effect, after describing in detail such as.
First embodiment
Fig. 3 is referred to, is a kind of flow process of the control method of LED display contrast that first embodiment of the invention is provided
Figure, including：
Step S101, obtains the gamma table of digital visual interface output, and the gamma table includes bit and its corresponding
Gray value information；
The embodiment of the present invention can be applicable to LED display control system, and the control system can include sending card and reception
Card.Specifically, the gamma that digital visual interface (DVI, Digital Visual Interface) is exported can be obtained by sending card
(Gamma) table, the Gamma table include bit (bit) position and its corresponding gray value information, and the wherein gray value information is permissible
Including gray scale values.
Step S102, according to the gamma table and default adjustment function, obtains target gamma table, with according to the target gamma
Table is adjusted to LED display contrast, wherein the first gray portion in the corresponding gamma correction curve of target gamma table
And second the slope of gray portion be less than the oblique of the 3rd gray portion between first gray scale and second gray portion
Rate.
Wherein, the first gray portion be it has been generally acknowledged that low ash part, i.e., (as Fig. 1) in low in gamma correction curve
The gray scale interval corresponding to bit value interval in the first bit value；Second gray portion be it has been generally acknowledged that height ash part, i.e.,
(as Fig. 1) in the gray scale interval corresponding to the bit value interval higher than the second bit value in gamma correction curve；3rd ash
Degree part is the gray scale interval corresponding to the bit value interval for being less than the second bit value more than the first bit value.
Specifically, first the Gamma table that DVI is exported can be modified according to default adjustment function, then will revises
Gamma table afterwards is converted to the target Gamma table that LED display control system is used, and adjusts further according to the target Gamma table
LED display contrast.
Or, the Gamma table that first can be exported DVI is converted to the Gamma table that LED display control system is used, so
The Gamma table after conversion is modified according to default adjustment function afterwards, to obtain target Gamma table, further according to the target
Gamma table adjusts LED display contrast.
Wherein, above-mentioned can be complete in sending card or receiving card the step of be modified to Gamma table according to adjustment function
Become.
According to default adjustment function to the core that Gamma table is modified it is：By the regulation of the adjustment function, obtain
The Gamma calibration curve of S-shaped as shown in Figure 2, i.e. so that the first gray portion in Gamma calibration curve as shown in Figure 1
And second the slope of gray portion be less than the 3rd gray portion between first gray portion and second gray portion
Slope, that is, the slope at curve two ends is little and centre position slope big, such that where dark when image shows more
Secretly, brighter where bright, so as to improve contrast.
In embodiments of the present invention, by the gamma table that exported according to digital visual interface and default adjustment function, obtain
Target gamma table, due to the first gray portion in the corresponding gamma correction curve of target gamma table and the second gray portion
Slope is less than the slope of the 3rd gray portion between first gray portion and second gray portion, then according to this
Target gamma table is adjusted to LED display contrast, dark pixel in image to be shown can be adjusted so as to darker, bright
Pixel be adjusted so as to brighter, realize secretly bright becomes apparent from, but the change of the overall brightness of image is less, so as to obtaining preferably
Contrast effect so that LED display has preferable display effect, and picture overall brightness is inclined after effectively solving contrast adjustment
Dark or partially bright problem.
Second embodiment
Fig. 4 is referred to, is a kind of flow process of the control method of LED display contrast that second embodiment of the invention is provided
Figure, including：
Step S201, obtains the gamma table of digital visual interface output, and the gamma table includes bit and its corresponding
Gray value information；
This step is identical with step S101, and here is omitted.
Step S202, sending card are modified to the gamma table according to default adjustment function so that revised gamma
In the corresponding gamma correction curve of table, the slope of the first gray portion and the second gray portion is less than between first gray portion
And the slope of the 3rd gray portion between second gray portion；
Wherein, the first gray portion be it has been generally acknowledged that low ash part, i.e., (as Fig. 1) in low in gamma correction curve
The gray scale interval corresponding to bit value interval in the first bit value；Second gray portion be it has been generally acknowledged that height ash part, i.e.,
(as Fig. 1) in the gray scale interval corresponding to the bit value interval higher than the second bit value in gamma correction curve；3rd ash
Degree part is the gray scale interval corresponding to the bit value interval for being less than the second bit value more than the first bit value.
In the present embodiment, the relational expression of the adjustment function is：
Wherein, x represents the gray scale values of DVI output, x ∈ (0,1)；Y represents the gray scale ratio of the DVI output after calculating
Example value, Y ∈ (0,1)；C is contrast level parameter value, c ∈ (0,4).
In Fig. 2, the solid line L4 two adjustment function curves different with the respectively c value shown in solid line L5.The pushing away of the formula
The process of leading is：
C=1.5 (span between 0.0～4.0) contrast level parameter value；
U=1+c；
U'=U* (- 1+2*x)；
S=1.0/ (1.0+e (- U'))；
V=1.0/ (1.0+e (U))；
Y=(S-v) * 0.5/ (0.5-v)；
The gray scale values of revised DVI output, corresponding scope or 0～1.
In conjunction with Fig. 1 and Fig. 2, the bit value 0～255 of transverse axis input in Fig. 1 is corresponded in 0～1 of transverse axis input in Fig. 2,
For example, in Fig. 1, bit value 255 corresponds to the bit value in X=0, Fig. 1 in Fig. 2 corresponding to the bit value 0 in X=1, Fig. 1 in Fig. 2
100 corresponding to the X=101/256=0.39453125 in Fig. 2.Then a certain X value (as x) is brought into above-mentioned adjustment function
In, obtaining a Y value (as y), be then multiplied by the corresponding bit value (as m) in FIG of X value (x) with this Y value (y), i.e., m*y is obtained
To revised bit value (n), n is brought in the curve in Fig. 1, corresponding gray value is found, that is, complete a certain bit position ash
The correction of degree, namely realize the stretching of gray scale.
It is to be appreciated that above-mentioned relation formula is only a kind of preferable examples, in practical application, it is also possible to using enabling to
Gamma calibration curve the first gray portion and the second gray portion slope be less than in first gray portion and this second
Other adjustment functions similar with above-mentioned adjustment function of the slope of the 3rd gray portion of gray portion middle are defeated to DVI
The Gamma table for going out is modified.
Step S203, the revised gamma table is sent to receiving card so that the receiving card is by the revised gamma
Table is converted to the target gamma table that LED display control system is used, with according to the target gamma table to LED display contrast
It is adjusted.
In the present embodiment, revised for adjusted function Gamma table is sent to receiving card by sending card, and indicates that this connects
Receive card and the Gamma table of the correction is converted into the target Gamma table that LED display control system is used, with according to the target
Gamma table adjusts LED display contrast.
In embodiments of the present invention, by the gamma table that exported according to digital visual interface and default adjustment function, obtain
Target gamma table, due to the first gray portion in the corresponding gamma correction curve of target gamma table and the second gray portion
Slope is less than the slope of the 3rd gray portion between first gray portion and second gray portion, then according to this
Target gamma table is adjusted to LED display contrast, dark pixel in image to be shown can be adjusted so as to darker, bright
Pixel be adjusted so as to brighter, realize secretly bright becomes apparent from, but the overall brightness of image is not changed much, so as to obtaining more
Good contrast effect so that LED display has preferable display effect, and picture is integrally bright after effectively solving contrast adjustment
The partially dark or partially bright problem of degree.
3rd embodiment
Fig. 5 is referred to, is a kind of flow process of the control method of LED display contrast that third embodiment of the invention is provided
Figure, including：
Step S301, obtains the gamma table of digital visual interface output, and the gamma table includes bit and its corresponding
Gray value information；
This step is identical with step S101, and here is omitted.
Step S302, the gamma table is sent to receiving card so that the gamma table is converted to LED display by the receiving card
The gamma table that control system is used；
In the present embodiment, the Gamma table that DVI is exported by sending card is sent to receiving card, indicates that the receiving card should
Gamma table is converted to the Gamma table that LED display control system is used, and according to default adjustment function in the receiving card
Revise the Gamma table after conversion.
Step S303, is modified to obtain to the gamma table after conversion according to default adjustment function in the receiving card
Target gamma table so that the first gray portion and the second gray portion in the corresponding gamma correction curve of target gamma table
Slope is less than the slope of the 3rd gray portion between first gray portion and second gray portion, with according to the mesh
Mark gamma table is adjusted to LED display contrast.
In the present embodiment, receiving card is used in adjustment function and the second embodiment for revise the Gamma table after changing
Adjustment function identical, here is omitted.
In embodiments of the present invention, by the gamma table that exported according to digital visual interface and default adjustment function, obtain
Target gamma table, due to the first gray portion in the corresponding gamma correction curve of target gamma table and the second gray portion
Slope is less than the slope of the 3rd gray portion between first gray portion and second gray portion, then according to this
Target gamma table is adjusted to LED display contrast, dark pixel in image to be shown can be adjusted so as to darker, bright
Pixel be adjusted so as to brighter, realize secretly bright becomes apparent from, but the overall brightness of image is not changed much, so as to obtaining more
Good contrast effect so that LED display has preferable display effect, and picture is integrally bright after effectively solving contrast adjustment
The partially dark or partially bright problem of degree.
Fourth embodiment
Fig. 6 is referred to, a kind of regulating system of LED display contrast of fourth embodiment of the invention offer is provided
Structural representation, as shown in fig. 6, regulating system 40 includes：Acquisition module 41 and adjustment module 42；
Acquisition module 41, runs on sending card, for obtaining the gamma table of digital visual interface output, wraps in the gamma table
Include bit and its corresponding gray value information；
Adjustment module 42, for the gamma table and the default adjustment function that obtain according to acquisition module 41, obtains target
Gamma table, to be adjusted to LED display contrast according to the target gamma table, the wherein corresponding gamma of target gamma table
In calibration curve, the slope of the first gray portion and the second gray portion is less than between first gray portion and second gray scale
The slope of the 3rd gray portion between part.
Specifically, the gamma table of digital visual interface output is obtained by acquisition module 41 first, and the gamma table includes ratio
Special position and its corresponding gray value information；Then the gamma table for being obtained according to acquisition module 41 by adjustment module 42 with default
Adjustment function, obtains target gamma table, to be adjusted to LED display contrast, the wherein mesh according to the target gamma table
In the corresponding gamma correction curve of mark gamma table, the slope of the first gray portion and the second gray portion is less than between first ash
The slope of the 3rd gray portion between degree part and second gray portion.
In embodiments of the present invention, the gamma table for being exported according to digital visual interface by adjustment module and default regulation
Function, obtains target gamma table, due to the first gray portion in the corresponding gamma correction curve of target gamma table and the second ash
The slope of degree part is less than the slope of the 3rd gray portion between first gray portion and second gray portion, that
LED display contrast is adjusted according to the target gamma table, dark pixel in image to be shown can be adjusted
Darker, bright pixel be adjusted so as to brighter, realize secretly bright becomes apparent from, but the overall brightness of image is not changed much, from
And more preferable contrast effect can be obtained so that LED display has preferable display effect, after effectively solving contrast adjustment
The partially dark or partially bright problem of picture overall brightness.
5th embodiment
Fig. 7 is referred to, a kind of regulating system of LED display contrast of fifth embodiment of the invention offer is provided
Structural representation, as shown in fig. 7, from unlike fourth embodiment：
Further, adjustment module 42 includes：First correcting module 421, sending module 422 and the first modular converter
423；
First correcting module 421, runs on the sending card, for being obtained to acquisition module 41 according to default adjustment function
The gamma table be modified so that the first gray portion and the second ash in the corresponding gamma correction curve of revised gamma table
The slope of degree part is less than the slope of the 3rd gray portion between first gray portion and second gray portion；
Sending module 422, runs on the sending card, for sending 421 revised gamma table of the first correcting module
To receiving card；
First modular converter 423, runs on the receiving card, for the first correcting module for sending sending module 422
421 revised gamma table are converted to the target gamma table that LED display control system is used.
Further, adjustment module 42 also includes：Second modular converter 424 and the second correcting module 425；
Sending module 422, the gamma table for being additionally operable to obtain acquisition module 41 are sent to receiving card；
Second modular converter 424, runs on the receiving card, and the gamma table for sending sending module 422 is converted to
The gamma table that LED display control system is used；
Second correcting module 425, runs on the receiving card, for according to default adjustment function in the receiving card
The gamma table after two modular converter 424 is changed is modified to obtain target gamma table so that the target gamma table is corresponding
In gamma correction curve the slope of the first gray portion and the second gray portion be less than between first gray portion and this second
The slope of the 3rd gray portion between gray portion.
Further, the relational expression of the adjustment function is：
Wherein, x represents the gray scale values of the digital visual interface output and x ∈ (0,1), Y represent the number after calculating
Word video interface output gray scale values and Y ∈ (0,1), c be contrast level parameter value, c ∈ (0,4).
Specifically, the Gamma table of DVI output is obtained by acquisition module 41 by sending card first, and the Gamma table includes
Bit position and its corresponding gray value information；Then, the sending card passes through the first correcting module 421, according to default adjustment function
The Gamma table that acquisition module 41 is obtained is modified so that in the corresponding Gamma calibration curve of revised Gamma table
The slope of the first gray portion and the second gray portion is less than between first gray portion and second gray portion
The slope of the 3rd gray portion；Then, the sending card by sending module 422 by revised for the first correcting module 421 should
Gamma table is sent to receiving card；Afterwards, first for being sent sending module 422 by the first modular converter 423 by receiving card is repaiied
Positive revised Gamma table of module 421 is converted to the target Gamma table that LED display control system is used, with according to the mesh
Mark Gamma table is adjusted to LED display contrast.
Or specifically, obtained the Gamma table of DVI output first by sending card by acquisition module 41；Then, the transmission
The Gamma table that acquisition module 41 is obtained by card by sending module 422 is sent to receiving card；Then, passed through by the receiving card
The Gamma table that sending module 422 is sent by the second modular converter 424 is converted to the Gamma that LED display control system is used
Table；Afterwards, the receiving card is by the second correcting module 425 according to default adjustment function to the second modulus of conversion in the receiving card
The Gamma table after block 424 is changed is modified to obtain target Gamma table so that the corresponding Gamma of the target Gamma table
In calibration curve, the slope of the first gray portion and the second gray portion is less than between first gray portion and second gray scale
The slope of the 3rd gray portion between part, to be adjusted to LED display contrast according to the target Gamma table.
In embodiments of the present invention, the gamma table for being exported according to digital visual interface by adjustment module and default regulation
Function, obtains target gamma table, due to the first gray portion in the corresponding gamma correction curve of target gamma table and the second ash
The slope of degree part is less than the slope of the 3rd gray portion between first gray portion and second gray portion, that
LED display contrast is adjusted according to the target gamma table, dark pixel in image to be shown can be adjusted
Darker, bright pixel be adjusted so as to brighter, realize secretly bright becomes apparent from, but the overall brightness of image is not changed much, from
And more preferable contrast effect can be obtained so that LED display has preferable display effect, after effectively solving contrast adjustment
The partially dark or partially bright problem of picture overall brightness.
The above, is only presently preferred embodiments of the present invention, not makees any pro forma restriction to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any is familiar with this professional technology people
Member, in the range of without departing from technical solution of the present invention, when the technology contents using the disclosure above make a little change or modification
For the Equivalent embodiments of equivalent variations, as long as be without departing from technical solution of the present invention content, according to the technical spirit pair of the present invention
Any simple modification, equivalent variations and modification that above example is made, all still fall within the range of technical solution of the present invention.
Claims (6)
1. a kind of control method of LED display contrast, it is characterised in that include：
The gamma table of digital visual interface output is obtained, the gamma table includes bit and its corresponding gray value information,
The gray value information includes gray scale values；
According to the gamma table and default adjustment function, target gamma table is obtained, with aobvious to LED according to the target gamma table
Display screen contrast is adjusted, the first gray portion and the second ash in the corresponding gamma correction curve of wherein described target gamma table
The slope of degree part is less than the oblique of the 3rd gray portion between first gray portion and second gray portion
Rate, the relational expression of the adjustment function is：
Wherein, x represents the gray scale values of digital visual interface output and x ∈ (0,1), Y represent the number after calculating
Word video interface output gray scale values and Y ∈ (0,1), c be contrast level parameter value, c ∈ (0,4).
2. method according to claim 1, it is characterised in that described according to the gamma table and default adjustment function,
Target gamma table is obtained, including：
Sending card is modified to the gamma table according to default adjustment function so that the corresponding gamma of revised gamma table
In calibration curve, the slope of the first gray portion and the second gray portion is less than between first gray portion and described second
The slope of the 3rd gray portion between gray portion；
The revised gamma table is sent to receiving card so that the revised gamma table is converted to by the receiving card
The target gamma table that LED display control system is used.
3. method according to claim 1, it is characterised in that described according to the gamma table and default adjustment function,
Target gamma table is obtained, is also included：
The gamma table is sent to receiving card so that the gamma table is converted to LED display control system by the receiving card
The gamma table that system is used；
It is modified and obtains target gal in the receiving card according to default adjustment function to the gamma table after conversion
Stopwatch so that the slope of the first gray portion and the second gray portion is low in the corresponding gamma correction curve of the target gamma table
Slope in the 3rd gray portion between first gray portion and second gray portion.
4. a kind of regulating system of LED display contrast, it is characterised in that include：Acquisition module and adjustment module；
The acquisition module, runs on sending card, for obtaining the gamma table of digital visual interface output, wraps in the gamma table
Bit and its corresponding gray value information is included, the gray value information includes gray scale values；
The adjustment module, for the gamma table and the default adjustment function that obtain according to the acquisition module, obtains mesh
Mark gamma table, to be adjusted to LED display contrast according to the target gamma table, wherein described target gamma table is corresponded to
Gamma correction curve in the first gray portion and the second gray portion slope be less than between first gray portion and institute
The slope of the 3rd gray portion between the second gray portion is stated, the relational expression of the adjustment function is：
Wherein, x represents the gray scale values of digital visual interface output and x ∈ (0,1), Y represent the number after calculating
Word video interface output gray scale values and Y ∈ (0,1), c be contrast level parameter value, c ∈ (0,4).
5. system according to claim 4, it is characterised in that the adjustment module includes：First correcting module, transmission mould
Block and the first modular converter；
First correcting module, runs on the sending card, for being obtained to the acquisition module according to default adjustment function
The gamma table for taking is modified so that the first gray portion and in the corresponding gamma correction curve of revised gamma table
The slope of two gray portion is less than the 3rd gray portion between first gray portion and second gray portion
Slope；
The sending module, runs on the sending card, for sending out revised for first correcting module gamma table
Give receiving card；
First modular converter, runs on the receiving card, for the described first correction mould for sending the sending module
The revised gamma table of block is converted to the target gamma table that LED display control system is used.
6. system according to claim 4, it is characterised in that the adjustment module also includes：Second modular converter, transmission
Module and the second correcting module；
The sending module, the gamma table for being additionally operable to obtain the acquisition module are sent to receiving card；
Second modular converter, runs on the receiving card, for the gamma table conversion for sending the sending module
For the gamma table that LED display control system is used；
Second correcting module, runs on the receiving card, for according to default adjustment function pair in the receiving card
The gamma table after the second modular converter conversion is modified to obtain target gamma table so that the target gamma table
In corresponding gamma correction curve, the slope of the first gray portion and the second gray portion is less than between first gray portion
And the slope of the 3rd gray portion between second gray portion.
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| CN106714383B (en) * | 2017-01-19 | 2018-07-24 | 深圳市汇德科技有限公司 | A kind of LED light light control method |
| CN107068044B (en) * | 2017-05-22 | 2019-03-26 | 西安诺瓦电子科技有限公司 | Image gamma revision method, scanning card and display system |
| CN109036262B (en) * | 2018-09-06 | 2020-06-02 | 长春希达电子技术有限公司 | Display characteristic curve correction method and control system of medical LED display screen |
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