CN107749284A - The offset data acquisition methods and liquid crystal display of a kind of curved surface panel - Google Patents
The offset data acquisition methods and liquid crystal display of a kind of curved surface panel Download PDFInfo
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- CN107749284A CN107749284A CN201711081146.3A CN201711081146A CN107749284A CN 107749284 A CN107749284 A CN 107749284A CN 201711081146 A CN201711081146 A CN 201711081146A CN 107749284 A CN107749284 A CN 107749284A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 18
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- 238000012545 processing Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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Abstract
The invention discloses a kind of offset data acquisition methods of curved surface panel and liquid crystal display.Wherein, the offset data acquisition methods of curved surface panel include：Position and the Mura offset datas of the compensation point of curved surface panel are obtained, compensation point is projection of the pixel of curved surface panel in plane picture；Linear interpolation is carried out according to the position of the parameter of curved surface panel and compensation point, to obtain the position of interpolation point, interpolation point is the pixel of curved surface panel；The offset data of interpolation point is calculated according to the position of Mura offset datas and interpolation point.By the above-mentioned means, the present invention can improve the product quality of curved surface panel；The position of interpolation point is obtained by the way of linear interpolation, can effectively reduce amount of calculation.
Description
Technical field
The present invention relates to display technology field, more particularly to the offset data acquisition methods and liquid crystal of a kind of curved surface panel
Display.
Background technology
As liquid crystal display (Liquid Crystal Display, LCD) is sent out towards lighter, thinner, bigger direction
Exhibition, because of some uncontrollable factors on actual processing procedure, has differences the physical characteristic of LCD display panel everywhere, causes big
In the range of a pixel, the phenomenon of brightness irregularities when showing pure gray level image, i.e., the Mura phenomenons alleged by industry.
Mura phenomenons have become the bottleneck for restricting LCD development.By improving technological level or improving material purity
The methods of can reduce the probability of happening of Mura phenomenons.It is fixed for the LCD display panel to have completed, its physical characteristic
Type, in order to make up the flaw on LCD processing procedures and caused Mura phenomenons, now can correct picture by way of grey level compensation
The brightness of vegetarian refreshments, and then improve Mura phenomenons.
Grey level compensation is to realize the improvement of brightness uniformity by changing the gray value of pixel：Shot by camera
The Mura situations of gray scale picture, apply relatively low gray value for the higher pixel of display brightness, compare for display brightness
Low pixel, apply higher gray value so that the brightness of each pixel realizes changing for Mura phenomenons close to unanimously after grey level compensation
It is kind.
At present, curved surface LCD TV is more and more popular, but panel (panel) is bent into curved surface by flat state
After state, the liquid crystal in it other unpredictable Mura (panel planes can occur because of being extruded by glass folding s tress
Do not have under state, but increased newly after bending), so Mura reparations can not be carried out under panel flat states, then by panel
Curved surface is bent into, unique method can only carry out Mura compensation under curved surface panel states and repair；And the Mura compensation of industry is repaiied
It is flat state that compound method, which is all based on panel, because the panel that camera photographs is aobvious under flat state and curved surface state
Show that area has differences, the projection plane length under curved surface state is less than the plane length under flat state, therefore can not be direct
Restorative procedure is compensated using existing plane Mura to calculate the Mura offsets of panel each regional locations under curved surface state,
Suitable curved surface panel Mura phenomenon compensation methodes must be developed.
The content of the invention
The present invention solves the technical problem of provide a kind of the offset data acquisition methods and liquid crystal of curved surface panel
Show device, the product quality of curved surface panel can be improved.
In order to solve the above technical problems, one aspect of the present invention is：A kind of compensation of curved surface panel is provided
Data capture method, including：Position and the Mura offset datas of the compensation point of curved surface panel are obtained, compensation point is curved surface panel
Projection of the pixel in plane picture；Linear interpolation is carried out according to the position of the parameter of curved surface panel and compensation point, inserted with obtaining
It is worth the position of point, interpolation point is the pixel of curved surface panel；Interpolation point is calculated according to the position of Mura offset datas and interpolation point
Offset data.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of liquid crystal display is provided, wrapped
Curved surface panel and controller are included, controller is used for position and offset data using the interpolation point obtained according to the above method to song
Panel carries out Mura phenomenon compensation.
The beneficial effects of the invention are as follows：It is different from the situation of prior art, the compensation of the invention by obtaining curved surface panel
The position of point and Mura offset datas, compensation point are projection of the pixel of curved surface panel in plane picture；According to curved surface panel
Parameter and the position of compensation point carry out linear interpolation, to obtain the position of interpolation point, interpolation point is the pixel of curved surface panel；Root
The offset data of interpolation point, and then the position according to interpolation point and compensation number are calculated according to the position of Mura offset datas and interpolation point
Mura compensation is carried out according to curved surface panel, realizes and Mura compensation, lifting is carried out to the curved surface liquid crystal panel under curved surface state
The product quality of curved surface liquid crystal panel；The position of interpolation point is obtained by the way of linear interpolation, can effectively reduce meter
Calculation amount.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of the embodiment of offset data acquisition methods one of curved surface panel of the present invention；
Fig. 2 is the calculating schematic diagram of one of them specific interpolation point of the step S103 in Fig. 1；
Fig. 3 is a kind of structural representation of an embodiment of liquid crystal display of the present invention.
Embodiment
Referring to Fig. 1, Fig. 1 is a kind of schematic flow sheet of the embodiment of offset data acquisition methods one of curved surface panel.
If it is noted that there is substantially the same result, method of the invention is not limited with the flow order shown in Fig. 1.Such as Fig. 1
Shown, this method comprises the following steps：
S101：Position and the Mura offset datas of the compensation point of curved surface panel are obtained, compensation point is the pixel of curved surface panel
Projection in plane picture.
Wherein, Mura refers to that display brightness is uneven, causes the phenomenon of various vestiges.Simplest determination methods are just
It is that black picture is switched in darkroom, and other low grey menus.Then firmly gone from a variety of angles, with
Miscellaneous processing procedure flaw, liquid crystal display just has miscellaneous Mura.Such as：It is probably travers or 45
Spend angle bead line, it may be possible to cut to obtain very straight square, it may be possible to which some corner occurs one piece, it is also possible to be to spend colored completely not having
Rule, the vestige in eastern one piece of one piece of west.Therefore, it is necessary to be compensated to the Mura phenomenons of display.
In a wherein specific embodiment, camera device can be utilized to enter shooting to curved surface panel, to obtain song
The plane picture of faceplate panels, position and the Mura offset datas of compensation point are then obtained according to plane picture.Specifically, Ke Yili
Curved surface panel is shot with camera, furthermore it is also possible to utilize mobile terminal (such as the intelligent hand with camera function
Machine) curved surface panel is shot.
In theory, it is only necessary to which camera device is shot in the front of curved surface panel, and obtains the plane picture of curved surface panel i.e.
Can.But in order to conveniently be inserted in subsequent step to the position of the parameter according to curved surface panel and acquired compensation point
Value, can set and be shot on the axis of camera device curved surface panel, specifically, camera device can be with Distance surface panel
At a certain distance from axis on shot, axis refers to the line where the center of circle of curved surface panel.
Further, since there are many uncertainties to the shooting process of curved surface panel using camera device, therefore, can obtain
At least position of the compensation point of cubic surface panel and Mura offset datas are taken, the display picture of the curved surface panel obtained every time
Gray scale is different, so as to improve the accuracy of the offset data finally obtained.Specifically, the gray scale of the display picture of curved surface panel can
With selected from the gray scale interval including 0 gray scale and maximum gray scale.Wherein, maximum gray scale is 255.
S102：Linear interpolation is carried out according to the position of the parameter of curved surface panel and compensation point, to obtain the position of interpolation point,
Interpolation point is the pixel of curved surface panel.
Because curved surface panel is simply curved surface in the horizontal direction, and it is plane in vertical direction, therefore can be according to curved surface
The parameter of panel and the position of compensation point above carry out linear interpolation in only the horizontal direction, obtain the position of interpolation point.
Specifically, the position of interpolation point is calculated using below equation：
X=n*L*cos (μ 1)+k (n* (n-1)/2),
Wherein, x is minimum value of the interpolation point apart from the horizontal range of the vertical edge of plane picture, and n is corresponding for interpolation point
Sequence number of the curved surface panel pixel on curved surface panel in horizontal line and the sequence number with the edge pixel in a line difference most
Small value.L is the air line distance between adjacent pixel on curved surface panel, and L=2*sin (α/2) * R, α=180*c/ (π * R), R are song
The radius of faceplate panels, c are the distance of curved surface between adjacent pixel, μ 1=arccos (L/ (2*R))-arccos on curved surface panel
(d/R), d is half chord length of curved surface panel, and 2d is the length of the plane picture of curved surface panel in the horizontal direction.K is projection
The difference of the spacing of continuous two pairs of adjacent pixels in plane, k=(L-L*cos (μ 1))/(M/2), M are on curved surface panel-level direction
Number of pixels.It should be noted that n is sequence number of the curved surface panel pixel on curved surface panel in horizontal line corresponding to interpolation point
With the minimum value of the absolute value of the difference of the sequence number of the edge pixel in same a line.Using the center of curved surface panel as boundary, if bent
The pixel of faceplate panels is located at left demifacet, then x is horizontal range of the corresponding interpolation point apart from the left hand edge of plane picture, and n is song
The difference of sequence number of the pixel of faceplate panels in horizontal line and the sequence number of left hand edge pixel；If the pixel of curved surface panel is positioned at the right side
Demifacet, then x is horizontal range of the corresponding interpolation point apart from the right hand edge of plane picture, and n is the pixel of curved surface panel in level
The difference of sequence number and the sequence number of right hand edge pixel in row.
Specifically, Fig. 2 can be referred to, Fig. 2 is one of them specific interpolation point of the step S103 in Fig. 1 of the present invention
Calculate schematic diagram.As shown in Fig. 2 Fig. 2 includes camera 21 and curved surface panel 23.Wherein, camera 21 is arranged on distance
On the axis of curved surface panel 23, and the distance of Distance surface panel 23 is R, it is assumed that the location of camera 21 is O points.It is flat
Face image 22 is obtained plane picture captured by camera 21, and the pixel 221 on plane picture 22 is clapped by camera 21
Take the photograph obtained compensation point, the pixel D on curved surface panel 23 is projected as point P on plane picture 22, and point P is pixel D
Corresponding interpolation point.Pixel A and pixel F on curved surface panel 23 overlap with the point H on plane picture 22 and Z respectively.
By taking Left half-plane as an example, pixel B is a nearest pixel of Distance surface panel left hand edge, curved surface panel 23
On pixel A Range Profile vegetarian refreshments B air line distance be L, and L=2*sin (α/2) * R, wherein, it is public according to fan-shaped central angle
Formula, α=∠ AOB=180*c/ (π * R), α unit are degree, and c is that the distance of curved surface between adjacent pixel, c are on curved surface panel
The intrinsic parameter of curved surface panel, is known.μ 1=∠ OAB- ∠ OAK, wherein, cos ∠ OAB=L/ (2*R), cos ∠ OAK=
D/R, therefore, μ 1=arccos ∠ OAB-arccos ∠ OAK=arccos (L/ (2*R))-arccos (d/R).Therefore, pixel
Projection P 1 Range Profile vegetarian refreshments As of the B on plane picture 22 distance is AP1=L*cos (μ 1).In addition, with curved surface panel 23
The passage of the position of upper pixel 231, projection of the adjacent pixel on plane picture 22 on the arc top of curved surface panel 23
The distance between L*cos (μ N) because of 0 degree of ∠ μ N ≈ can be approximately equal to L.Further, since pixel 231 on curved surface panel 23
The mapping of position in the horizontal direction is approximate with μ proportional, therefore, with the nth pixel in a line on curved surface panel 23
Spacing between the projection on plane picture 22 of point and (n+1)th pixel can be approximately：L*cos(μ1)+k*n；Wherein k=
(L-L*cos (μ 1))/(M/2), k are the difference of the spacing of continuous two pairs of neighbor interpolations point on plane picture 22, such as P1P2-AP1
=k.Therefore the distance for the 231 projection P distance A on plane picture 22 being put on curved surface panel 23 is x=n*L*cos (μ 1)+k*
(1+2+ ...+n-1)=n*L*cos (μ 1)+k (n* (n-1)/2).
In addition, example from above calculate be left semi-surface in Fig. 2 the interpolation that is projected on plane picture 22 of pixel
The position of point, because the right semi-surface in Fig. 2 with left semi-surface is that pixel is symmetrical, therefore it can be drawn according to above method
The position for the interpolation point that the pixel of right semi-surface projects on plane picture 22.
S103：The offset data of interpolation point is calculated according to the position of Mura offset datas and interpolation point.
Wherein, after projected position of the interpolation point on plane picture is calculated, it is also necessary to judge that interpolation point exists
Whether the projected position on plane picture overlaps with the position of compensation point.When interpolation point has the compensation point overlapped with it, with weight
Offset data of the Mura offset datas of the compensation point of conjunction as interpolation point, when the compensation point that interpolation point does not overlap with it,
Offset data using the weighted sum of the Mura offset datas of two compensation points adjacent with interpolation point as interpolation point.
Specifically, weighted sum is calculated using below equation：
Y=(P*d1+Q*d2)/(2d/X),
Wherein y is weighted sum, and P and Q are respectively that the Mura of second compensation point adjacent with interpolation point and the first compensation point is mended
Repay data, horizontal ranges of the d1 between the first compensation point and interpolation point, levels of the d2 between the second compensation point and interpolation point
Distance, d1=| x- (2d/X) * m1 |, d2=| x- (2d/X) * m2 |, m1 and m2 are respectively the first compensation point and second compensation
Sequence number of the point in horizontal line and the minimum value of the difference of the sequence number with the edge pixel in a line, X is plane picture level side
Upward number of pixels.
It is song by the position and Mura offset datas, compensation point for the compensation point for obtaining curved surface panel in present embodiment
Projection of the pixel of faceplate panels in plane picture；Linear interpolation is carried out according to the position of the parameter of curved surface panel and compensation point,
To obtain the position of interpolation point, interpolation point is the pixel of curved surface panel；Calculated according to the position of Mura offset datas and interpolation point
The offset data of interpolation point, and then Mura compensation is carried out to curved surface panel according to the position and offset data of interpolation point, realize
Mura compensation is carried out to the curved surface liquid crystal panel under curved surface state, improves the product quality of curved surface liquid crystal panel；Using line
The mode of property interpolation obtains the position of interpolation point, can effectively reduce amount of calculation.
Referring to Fig. 3, Fig. 3 is a kind of structural representation of an embodiment of liquid crystal display of the present invention.This embodiment party
Liquid crystal display in formula includes curved surface panel 31 and controller 32.Wherein, curved surface panel 31 and controller 32, controller 32 are used
In the position of the interpolation point obtained using the method in any of the above-described embodiment and the combination not conflicted and offset data
Mura phenomenon compensation is carried out to curved surface panel.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, it is included within the scope of the present invention.
Claims (10)
- A kind of 1. offset data acquisition methods of curved surface panel, it is characterised in that including：Position and the Mura offset datas of the compensation point of the curved surface panel are obtained, the compensation point is the picture of the curved surface panel Projection of the element in plane picture；Linear interpolation is carried out according to the position of the parameter of the curved surface panel and the compensation point, obtains the position of interpolation point, institute State the pixel that interpolation point is the curved surface panel；The offset data of the interpolation point is calculated according to the position of the Mura offset datas and the interpolation point.
- 2. according to the method for claim 1, it is characterised in that the position of the compensation point for obtaining the curved surface panel and Mura offset datas include：Shooting is entered to the curved surface panel using camera device, to obtain the plane picture of the curved surface panel；Position and the Mura offset datas of the compensation point are obtained according to the plane picture.
- 3. according to the method for claim 2, it is characterised in thatThe camera device is shot on the axis of the curved surface panel specified distance.
- 4. according to the method for claim 1, it is characterised in that the parameter according to the curved surface panel and the compensation The position of point carries out linear interpolation, includes the step of the position for obtaining interpolation point：The linear interpolation is carried out according to the position of the parameter of the curved surface panel and the compensation point in the horizontal direction, obtained The position of interpolation point.
- 5. according to the method for claim 1, it is characterised in that the position of the interpolation point is：X=n*L*cos (μ 1)+k (n* (n-1)/2),Wherein, x is minimum value of the interpolation point apart from the horizontal range of the vertical edge of the plane picture, and n inserts to be described It is worth sequence number of the curved surface panel pixel on the curved surface panel in horizontal line corresponding to point and with the edge pixel in a line Sequence number difference minimum value, L is the air line distance between adjacent pixel on the curved surface panel, L=2*sin (α/2) * R, α=180*c/ (π * R), R are the radius of the curved surface panel, and c is the curved surface between adjacent pixel on the curved surface panel Distance, μ 1=arccos (L/ (2*R))-arccos (d/R), d are half chord length of the curved surface panel, and k is the projection plane The difference of the spacing of upper continuous two pairs of adjacent difference points, k=(L-L*cos (μ 1))/(M/2), M are the curved surface panel-level Number of pixels on direction.
- 6. according to the method for claim 5, it is characterised in that described according to the Mura offset datas and the interpolation point Position calculate the offset data of the interpolation point and include：Judge whether the interpolation point has the compensation point overlapped with it；When the interpolation point has the compensation point overlapped with it, using the Mura offset datas of the compensation point of the coincidence as The offset data of the interpolation point, will be with the interpolation point phase when the compensation point that the interpolation point does not overlap with it Offset data of the weighted sum of the Mura offset datas of two adjacent compensation points as the interpolation point.
- 7. according to the method for claim 6, it is characterised in that the weighted sum is：Y=(P*d1+Q*d2)/(2d/X),Wherein y is the weighted sum, and P and Q are respectively second compensation point and first compensation point adjacent with the interpolation point Mura offset datas, horizontal ranges of the d1 between first compensation point and the interpolation point, d2 are second compensation point With the horizontal range between the interpolation point, d1=| x- (2d/X) * m1 |, d2=| x- (2d/X) * m2 |, m1 and m2 are respectively institute State the difference of the sequence number of the first compensation point and second compensation point in horizontal line and the sequence number with the edge pixel in a line Minimum value, X be the plane picture horizontal direction on number of pixels.
- 8. according to the method for claim 1, it is characterised in that the position of the compensation point for obtaining the curved surface panel and Mura offset datas include：Obtain at least position of the compensation point of the curved surface panel and Mura offset datas three times, the curved surface face obtained every time The gray scale of the display picture of plate is different.
- 9. according to the method for claim 8, it is characterised in that the gray scale of the display picture of the curved surface panel is selected from With the gray scale interval including 0 gray scale and maximum gray scale.
- 10. a kind of liquid crystal display, it is characterised in that including curved surface panel and controller, the controller is used to use basis The position for the interpolation point that method described in claim any one of 1-9 obtains and offset data are carried out to the curved surface panel Mura phenomenons compensate.
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| CN111754906A (en) * | 2020-06-30 | 2020-10-09 | 上海天马微电子有限公司 | Method for detecting brightness uniformity of curved surface display screen |
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| CN108648722A (en) * | 2018-05-14 | 2018-10-12 | 京东方科技集团股份有限公司 | A kind of luminance compensation method and device |
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| CN110085166A (en) * | 2018-07-30 | 2019-08-02 | 武汉华星光电半导体显示技术有限公司 | The speck compensation method of curve screens and device |
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| CN111754906A (en) * | 2020-06-30 | 2020-10-09 | 上海天马微电子有限公司 | Method for detecting brightness uniformity of curved surface display screen |
| CN111754906B (en) * | 2020-06-30 | 2022-09-27 | 上海天马微电子有限公司 | Method for detecting brightness uniformity of curved surface display screen |
| CN113643671A (en) * | 2021-10-14 | 2021-11-12 | 惠科股份有限公司 | Defect compensation method and device of display panel and terminal equipment |
| CN115167017A (en) * | 2022-07-15 | 2022-10-11 | 惠科股份有限公司 | Display panel detection method, display module and display device |
| CN115167017B (en) * | 2022-07-15 | 2023-11-03 | 惠科股份有限公司 | Display panel detection method, display module and display device |
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