CN105244001A - Method and terminal for determining mura compensation value - Google Patents
Method and terminal for determining mura compensation value Download PDFInfo
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- CN105244001A CN105244001A CN201510754985.1A CN201510754985A CN105244001A CN 105244001 A CN105244001 A CN 105244001A CN 201510754985 A CN201510754985 A CN 201510754985A CN 105244001 A CN105244001 A CN 105244001A
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Abstract
The embodiment of the invention discloses a method for determining a mura compensation value. The method comprises the steps of: acquiring a grayscale image of a display panel; determining a target region sheltered by the display panel in the grayscale image; acquiring mura compensation values surrounding the target region; and determining a mura compensation value of the target region according to the mura compensation values surrounding the target region. Accordingly, the embodiment of the invention further discloses a device for determining the mura compensation value. By adopting the method and the device, the mura compensation value of the sheltered region in the panel of an LCD screen can be determined, so as to conduct mura compensation on the region, thereby increasing quality of the LCD screen.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of method and the terminal of determining mura offset.
Background technology
Along with constantly popularizing of high definition display device, as the high-definition display screen of main flow, the market demand that LCD (LiquidCrystalDisplay, liquid crystal display) shields is increasing.LCD screen, when producing in batches, can, because some defective workmanships, cause the panel luminance of LCD screen uneven unavoidably, forms mura of all kinds (bright trace or dark trace).In order to solve the problem, be currently suggested a kind of mura compensation scheme: the gray scale image being obtained panel by the mode of shooting, then the normal region in gray scale image and mura region is determined, finally according to the grey decision-making in the grey decision-making Contrary compensation mura region of normal region, thus make panel luminance consistent.
Usually, LCD screen when producing in batches, can label on its panel one piece opaque, for information such as the serial number recording panel, the operation completed and times of completing.Due to blocking of label, take the gray scale image obtained and there will be the lower region of a Block Brightness, in order to avoid compensating by mistake, the mura ignoring this region is compensated.As can be seen here, if be there is mura by the region that label blocks, so this mura cannot be compensated, and causes the quality of LCD screen to be affected.
Summary of the invention
Embodiments provide a kind of method and the terminal of determining mura offset, the mura offset determining the region be blocked in the panel of LCD screen can be realized, to carry out mura compensation to this region, thus improve the quality of LCD screen.
Embodiment of the present invention first aspect provides a kind of method determining mura offset, comprising:
Obtain the gray scale image of display panel;
In described gray scale image, determine the target area that described display panel is blocked;
Obtain the mura offset around described target area;
According to the mura offset around described target area, determine the mura offset of described target area.
In the first possibility implementation of first aspect, described in described gray scale image, determine to comprise the target area that described display panel is blocked:
In the predeterminable area of described gray scale image, determine the target area that described display panel is blocked.
In the second possibility implementation of first aspect, described in described gray scale image, determine to comprise the target area that described display panel is blocked:
In described gray scale image, grey decision-making is less than the region of predetermined threshold value as target area.
In the third possibility implementation of first aspect, the mura offset around the described target area of described acquisition, comprising:
Determine the reference grey decision-making of described gray scale image;
Obtain the actual gray value around described target area;
According to described with reference to grey decision-making and described actual gray value, calculate the mura offset around described target area.
In the 4th kind of possibility implementation of first aspect, the mura offset around the described target area of described acquisition, comprising:
Obtain the mura offset of upper area outside described target area and lower area respectively;
Described according to the mura offset around described target area, determine the mura offset of described target area, comprising:
Calculate the area ratio of described upper area and described lower area;
According to described area ratio, described target area is divided into upper and lower two parts;
Using the mura offset of the mura offset of described upper area as the upper part of described target area;
Using the mura offset of the mura offset of described lower area as the lower part of described target area.
Embodiment of the present invention second aspect provides a kind of device determining mura offset, comprising:
Image collection module, for obtaining the gray scale image of display panel;
Area determination module, in described gray scale image, determines the target area that described display panel is blocked;
Offset acquisition module, for obtaining the mura offset around described target area;
Offset determination module, for according to the mura offset around described target area, determines the mura offset of described target area.
In the first possibility implementation of first aspect, described area determination module, specifically in the predeterminable area of described gray scale image, determines the target area that described display panel is blocked.
In the second possibility implementation of first aspect, described area determination module, also specifically in described gray scale image, is less than the region of predetermined threshold value as target area using grey decision-making.
In the third possibility implementation of first aspect, described offset acquisition module comprises:
Reference value determining unit, for determining the reference grey decision-making of described gray scale image;
Actual value acquiring unit, for obtaining the actual gray value around described target area;
Compensation value calculation unit, for according to described reference grey decision-making and described actual gray value, calculates the mura offset around described target area.
May in implementation at the 4th kind of first aspect, described offset acquisition module, also specifically for obtaining the mura offset of upper area outside described target area and lower area respectively;
Described offset determination module comprises:
Ratio computing unit, for calculating the area ratio of described upper area and described lower area;
Area division unit, for according to described area ratio, is divided into upper and lower two parts by described target area;
First setup unit, for using the mura offset of the mura offset of described upper area as the upper part of described target area;
Second setup unit, for using the mura offset of the mura offset of described lower area as the lower part of described target area.
Therefore, the embodiment of the present invention, first obtain the gray scale image of display panel, the target area that display panel is blocked is determined again in gray scale image, and then the mura offset of target area is determined according to the mura offset around target area, mura compensation is carried out in the region that can realize being blocked in the panel to LCD screen, thus improves the quality of LCD screen.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet determining the method for mura offset that the embodiment of the present invention provides;
Fig. 2 is the schematic flow sheet that another kind that the embodiment of the present invention provides determines the method for mura offset;
Fig. 3 is a kind of structural representation determining the device of mura offset that the embodiment of the present invention provides;
Fig. 4 is the structural representation of a kind of offset acquisition module that the embodiment of the present invention provides;
Fig. 5 is the structural representation of a kind of offset determination module that the embodiment of the present invention provides;
Fig. 6 is the structural representation that another kind that the embodiment of the present invention provides determines the device of mura offset;
Fig. 7 is the schematic diagram of a kind of panel that the embodiment of the present invention provides;
Fig. 8 is the schematic diagram of a kind of mura offset that the embodiment of the present invention provides;
Fig. 9 is a kind of schematic diagram determining to divide target area that the embodiment of the present invention provides;
Figure 10 is the schematic diagram that another kind that the embodiment of the present invention provides determines to divide target area;
Figure 11 be the embodiment of the present invention provide another determine to divide the schematic diagram of target area.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is a kind of schematic flow sheet determining the method for mura offset in the embodiment of the present invention.The flow process of the method for the determination mura offset as shown in the figure in the present embodiment can comprise:
S101, obtains the gray scale image of display panel.
Preferably, the display panel in the embodiment of the present invention is the display panel that LCD (LiquidCrystalDisplay, liquid crystal display) shields.
Concrete, after LCD screen powers on, take the picture (picture of display should be pure color picture) shown by its display panel by camera or video camera, process is carried out to the picture of shooting and obtains gray scale image.Should understand, in gray scale image, the weight of picture point can characterize the grey decision-making of picture point.
S102, in described gray scale image, determines the target area that described display panel is blocked.
Concrete, in gray scale image, the region that picture point grey decision-making being less than predetermined threshold value is formed, is identified as the target area that display panel is blocked.Should understand, the region that display panel is blocked cannot printing opacity, causes captured image lower in the brightness in this region, and thus corresponding grey decision-making is less, can realize determining the region that is blocked by this feature.
Optionally, first in gray scale image, determine predeterminable area, then in predeterminable area, determine the target area that display panel is blocked.Described predeterminable area can be that designer presets, as designer determines according to the position occurred shelter; Also can be determined by statistics, the position as occurred according to front 100 shelters is determined.As the optional example of one, suppose that shelter is label, the position that designer is generally placed with on a display panel according to label, sets out predeterminable area as shown in Figure 7, and this predeterminable area covers the position that target area likely occurs.Visible, by setting predeterminable area, target area need not be searched in whole gray scale image, reduce hunting zone, save search time.
S103, obtains the mura offset around described target area.
Concrete, first determine the reference grey decision-making of gray scale image, then obtain the actual gray value around target area, finally according to reference to grey decision-making and actual gray value, calculate the mura offset around target area.In specific implementation process, refer to Fig. 8, suppose that A represents the grey decision-making curve of gray scale image, the reference grey decision-making of gray scale image is 25, p1 region and p3 region is comprised around target area, the actual gray value in p1 region is greater than with reference to grey decision-making (25 ~ 35), the actual gray value in p3 region is less than with reference to grey decision-making (25 ~ 15), so according to reference grey decision-making and actual gray value, the mura offset calculated can be as curveb, the mura offset in p1 region is 0 ~-10, the mura offset in p3 region is 0 ~ 10, visible superimposed curves A and curve B just in time can make the grey decision-making in p1 region and p3 region revert to reference gray level value.
S104, according to the mura offset around described target area, determines the mura offset of described target area.
Should understand, display panel occurs that the process of mura is generally gradual change, and thus the grey decision-making of gray scale image is also gradual change.So, although the grey decision-making of the target area be blocked cannot be determined, can infer that the grey decision-making of target area is approximately equal to the grey decision-making around target area.By this feature, the mura offset that can realize around according to target area determines the mura offset of target area.
As the optional embodiment of one, suppose that shelter is the label of a rectangle, so determine according to the mura offset around target area that the mode of the mura offset of target area comprises:
Mode one, as shown in Figure 9, first obtain the mura offset of upper area outside target area and lower area respectively, calculate the area ratio of upper area and lower area again, then according to area ratio, target area is divided into upper and lower two parts, finally using the mura offset of the mura offset of upper area as the upper part of target area, and using the mura offset of the mura offset of lower area as the lower part of target area.
Mode two, as shown in Figure 10, first obtain the mura offset of left region outside target area and right areas respectively, calculate the area ratio of left region and right areas again, then according to area ratio, target area is divided into left and right two parts, finally using the mura offset of the mura offset of left region as the left half of target area, and using the mura offset of the mura offset of right areas as the right half of target area.Present embodiment can be directed to the narrower bar shaped label of left and right width.
Mode three, as shown in figure 11, first obtain the upper area outside target area respectively, lower area, the mura offset of left region and right areas, calculate upper area again, lower area, the area ratio of left region and right areas, then according to area ratio, target area is divided into, under, left and right four part, finally using the mura offset of the mura offset of left region as the left half of target area, using the mura offset of the mura offset of right areas as the right half of target area, using the mura offset of the mura offset of left region as the left half of target area, and using the mura offset of the mura offset of right areas as the right half of target area.
It is pointed out that above-mentioned three kinds of modes are the example that the embodiment of the present invention provides, should not form the embodiment of the present invention and limit, other embodiment similar also belongs to the protection domain of the embodiment of the present invention.
Further, when after the mura offset determining target area, the mura offset in other region in itself and display panel is integrated, as the mura offset of display panel entirety, the gray-scale value of Contrary compensation display panel, thus make display panel brightness consistent.
Therefore, the embodiment of the present invention, first obtain the gray scale image of display panel, the target area that display panel is blocked is determined again in gray scale image, and then the mura offset of target area is determined according to the mura offset around target area, mura compensation is carried out in the region that can realize being blocked in the panel to LCD screen, thus improves the quality of LCD screen.
Fig. 2 is the another kind of schematic flow sheet determining the method for mura offset in the embodiment of the present invention.The flow process of the method for the determination mura offset as shown in the figure in the present embodiment can comprise:
S201, obtains the gray scale image of display panel.
Preferably, the display panel in the embodiment of the present invention is the display panel that LCD (LiquidCrystalDisplay, liquid crystal display) shields.
Concrete, after LCD screen powers on, take the picture (picture of display should be pure color picture) shown by its display panel by camera or video camera, process is carried out to the picture of shooting and obtains gray scale image.Should understand, in gray scale image, the weight of picture point can characterize the grey decision-making of picture point.
S202, in described gray scale image, determines the target area that described display panel is blocked.
Concrete, in gray scale image, the region that picture point grey decision-making being less than predetermined threshold value is formed, is identified as the target area that display panel is blocked.Should understand, the region that display panel is blocked cannot printing opacity, causes captured image lower in the brightness in this region, and thus corresponding grey decision-making is less, can realize determining the region that is blocked by this feature.
Optionally, first in gray scale image, determine predeterminable area, then in predeterminable area, determine the target area that display panel is blocked.Described predeterminable area can be that designer presets, as designer determines according to the position occurred shelter; Also can be determined by statistics, the position as occurred according to front 100 shelters is determined.As the optional example of one, suppose that shelter is label, the position that designer is generally placed with on a display panel according to label, sets out predeterminable area as shown in Figure 7, and this predeterminable area covers the position that target area likely occurs.Visible, by setting predeterminable area, target area need not be searched in whole gray scale image, reduce hunting zone, save search time.
S203, obtains the mura offset of upper area outside described target area and lower area respectively.
Should understand, display panel occurs that the process of mura is generally gradual change, and thus the grey decision-making of gray scale image is also gradual change.So, although the grey decision-making of the target area be blocked cannot be determined, can infer that the grey decision-making of target area is approximately equal to the grey decision-making around target area.By this feature, the mura offset that can realize around according to target area determines the mura offset of target area.
Concrete, first determine the reference grey decision-making of gray scale image, then the actual gray value of the upper area obtained outside target area and lower area, described upper area and lower area are as shown in Figure 9, finally according to reference to grey decision-making and actual gray value, calculate the mura offset around target area.
S204, calculates the area ratio of described upper area and described lower area.
S205, according to described area ratio, is divided into upper and lower two parts by described target area.
Such as, suppose that the area ratio of upper area and the lower area calculated is 2:3, so target area is divided into upper and lower two parts that area ratio is 2:3.
S206, using the mura offset of the mura offset of described upper area as the upper part of described target area, and using the mura offset of the mura offset of described lower area as the lower part of described target area.
Further, when after the mura offset determining target area, the mura offset in other region in itself and display panel is integrated, as the mura offset of display panel entirety, the gray-scale value of Contrary compensation display panel, thus make display panel brightness consistent.
Therefore, the embodiment of the present invention, first obtain the gray scale image of display panel, the target area that display panel is blocked is determined again in gray scale image, and then the mura offset of target area is determined according to the mura offset around target area, mura compensation is carried out in the region that can realize being blocked in the panel to LCD screen, thus improves the quality of LCD screen.
Fig. 3 is a kind of structural representation determining the device of mura offset in the embodiment of the present invention.The device of the determination mura offset as shown in the figure in the embodiment of the present invention at least can comprise image collection module 310, area determination module 320, offset acquisition module 330 and offset determination module 340, wherein:
Image collection module 310, for obtaining the gray scale image of display panel.
Preferably, the display panel in the embodiment of the present invention is the display panel that LCD (LiquidCrystalDisplay, liquid crystal display) shields.
Concrete, after LCD screen powers on, take the picture (picture of display should be pure color picture) shown by its display panel by camera or video camera, process is carried out to the picture of shooting and obtains gray scale image.Should understand, in gray scale image, the weight of picture point can characterize the grey decision-making of picture point.
Area determination module 320, in described gray scale image, determines the target area that described display panel is blocked.
Concrete, in gray scale image, the region that picture point grey decision-making being less than predetermined threshold value is formed, is identified as the target area that display panel is blocked.Should understand, the region that display panel is blocked cannot printing opacity, causes captured image lower in the brightness in this region, and thus corresponding grey decision-making is less, can realize determining the region that is blocked by this feature.Optionally, first in gray scale image, determine predeterminable area, then in predeterminable area, determine the target area that display panel is blocked.
Offset acquisition module 330, for obtaining the mura offset around described target area.Optionally, offset acquisition module 330 can comprise reference value determining unit 331, actual value acquiring unit 332 and compensation value calculation unit 333 as shown in Figure 4 further, wherein:
Reference value determining unit 331, for determining the reference grey decision-making of described gray scale image.
Actual value acquiring unit 332, for obtaining the actual gray value around described target area.
Compensation value calculation unit 333, for according to described reference grey decision-making and described actual gray value, calculates the mura offset around described target area.
Offset determination module 340, for according to the mura offset around described target area, determines the mura offset of described target area.
Further alternative, offset acquisition module 330, also specifically for obtaining the mura offset of upper area outside described target area and lower area respectively.Accordingly, offset determination module 340 can comprise ratio computing unit 341, area division unit 342 and offset setup unit 343 as shown in Figure 5 further, wherein:
Ratio computing unit 341, for calculating the area ratio of described upper area and described lower area.
Area division unit 342, for according to described area ratio, is divided into upper and lower two parts by described target area.
Offset setup unit 343, for using the mura offset of the mura offset of described upper area as the upper part of described target area, and using the mura offset of the mura offset of described lower area as the lower part of described target area.
Fig. 6 is the structural representation that another kind in the embodiment of the present invention determines the device of mura offset, and as shown in Figure 6, this device can comprise: at least one processor 401, such as CPU, at least one communication bus 402, at least one input/output end port 403, storer 404.Wherein, communication bus 402 is for realizing the connection communication between these assemblies; Input/output end port 403 for receiving and sending signal, such as, receives gray scale image and sends mura offset etc.; Storer 404 can be high-speed RAM storer, also can be non-volatile storer (non-volatilememory), such as at least one magnetic disk memory.Optionally, storer 404 can also be that at least one is positioned at the memory storage away from aforementioned processor 401.Store batch processing code in storer 404, processor 401, for calling the program code stored in storer 404, performs following operation:
Obtain the gray scale image of display panel;
In described gray scale image, determine the target area that described display panel is blocked;
Obtain the mura offset around described target area;
According to the mura offset around described target area, determine the mura offset of described target area.
Optionally, processor 401, in described gray scale image, determines that the concrete operations of the target area that described display panel is blocked are:
In the predeterminable area of described gray scale image, determine the target area that described display panel is blocked.
Another optional, processor 401, in described gray scale image, determines that the concrete operations of the target area that described display panel is blocked are:
In described gray scale image, grey decision-making is less than the region of predetermined threshold value as target area.
Optional again, the concrete operations of the mura offset that processor 401 obtains around described target area are:
Determine the reference grey decision-making of described gray scale image;
Obtain the actual gray value around described target area;
According to described with reference to grey decision-making and described actual gray value, calculate the mura offset around described target area.
Also optional, the concrete operations of the mura offset that processor 401 obtains around described target area are: the mura offset obtaining upper area outside described target area and lower area respectively.
Further, processor 401, according to the mura offset around described target area, determines that the concrete operations of the mura offset of described target area are:
Calculate the area ratio of described upper area and described lower area;
According to described area ratio, described target area is divided into upper and lower two parts;
Using the mura offset of the mura offset of described upper area as the upper part of described target area, and using the mura offset of the mura offset of described lower area as the lower part of described target area.
The embodiment of the present invention also proposed a kind of computer-readable storage medium, described computer-readable storage medium has program stored therein, and described program comprises some instructions in order to perform the part or all of step in the method for the determination mura offset described by embodiment of the present invention Fig. 1 or Fig. 2.
Therefore, the embodiment of the present invention, first obtain the gray scale image of display panel, the target area that display panel is blocked is determined again in gray scale image, and then the mura offset of target area is determined according to the mura offset around target area, mura compensation is carried out in the region that can realize being blocked in the panel to LCD screen, thus improves the quality of LCD screen.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. determine a method for mura offset, it is characterized in that, described method comprises:
Obtain the gray scale image of display panel;
In described gray scale image, determine the target area that described display panel is blocked;
Obtain the mura offset around described target area;
According to the mura offset around described target area, determine the mura offset of described target area.
2. the method for claim 1, is characterized in that, described in described gray scale image, determines to comprise the target area that described display panel is blocked:
In the predeterminable area of described gray scale image, determine the target area that described display panel is blocked.
3. the method for claim 1, is characterized in that, described in described gray scale image, determines to comprise the target area that described display panel is blocked:
In described gray scale image, region recognition grey decision-making being less than predetermined threshold value is the target area that described display panel is blocked.
4. the method for claim 1, is characterized in that, the mura offset around the described target area of described acquisition, comprising:
Determine the reference grey decision-making of described gray scale image;
Obtain the actual gray value around described target area;
According to described with reference to grey decision-making and described actual gray value, calculate the mura offset around described target area.
5. the method for claim 1, is characterized in that, the mura offset around the described target area of described acquisition, comprising:
Obtain the mura offset of upper area outside described target area and lower area respectively;
Described according to the mura offset around described target area, determine the mura offset of described target area, comprising:
Calculate the area ratio of described upper area and described lower area;
According to described area ratio, described target area is divided into upper and lower two parts;
Using the mura offset of the mura offset of described upper area as the upper part of described target area, and using the mura offset of the mura offset of described lower area as the lower part of described target area.
6. determine a device for mura offset, it is characterized in that, described device comprises:
Image collection module, for obtaining the gray scale image of display panel;
Area determination module, in described gray scale image, determines the target area that described display panel is blocked;
Offset acquisition module, for obtaining the mura offset around described target area;
Offset determination module, for according to the mura offset around described target area, determines the mura offset of described target area.
7. device as claimed in claim 6, is characterized in that, described area determination module, specifically in the predeterminable area of described gray scale image, determines the target area that described display panel is blocked.
8. device as claimed in claim 6, it is characterized in that, described area determination module, also specifically in described gray scale image, region recognition grey decision-making being less than predetermined threshold value is the target area that described display panel is blocked.
9. device as claimed in claim 6, it is characterized in that, described offset acquisition module comprises:
Reference value determining unit, for determining the reference grey decision-making of described gray scale image;
Actual value acquiring unit, for obtaining the actual gray value around described target area;
Compensation value calculation unit, for according to described reference grey decision-making and described actual gray value, calculates the mura offset around described target area.
10. device as claimed in claim 6, is characterized in that, described offset acquisition module, also specifically for obtaining the mura offset of upper area outside described target area and lower area respectively;
Described offset determination module comprises:
Ratio computing unit, for calculating the area ratio of described upper area and described lower area;
Area division unit, for according to described area ratio, is divided into upper and lower two parts by described target area;
Offset setup unit, for using the mura offset of the mura offset of described upper area as the upper part of described target area, and using the mura offset of the mura offset of described lower area as the lower part of described target area.
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