CN110285764A - A kind of measurement method and display panel of display panel cutting accuracy - Google Patents
A kind of measurement method and display panel of display panel cutting accuracy Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/03—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring coordinates of points
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Abstract
The present invention proposes the measurement method and display panel of a kind of display panel cutting accuracy, is related to the technical field of display panel, and measurement method includes the following steps: S1: confirmation is by the vertex of cutting angle；S2: it is extracted in the way of magnification ratio according to vertex by the rectangle where cutting angle；S3: obtaining coordinate distribution first with scanning mode in rectangle, reuse computer and calculate corresponding distribution function, that is, determines by the slope line or curve of cutting angle, determines two cutting interface points further according to the intersection point of slope line or curve and face plate edge line；S4: the pixel quantity that vertex is cut between interface point with two respectively is calculated by algorithm, corresponding position distance is converted into according to camera pixel size and obtains actual measurement distance；S5: the difference by calculating actual measurement distance and panel designed distance obtains the cutting accuracy error amount of display panel.The present invention solves the problems, such as that display panel abnormal shape cutting accuracy time of measuring is longer in liquid crystal display panel manufacturing industry.
Description
Technical field
The invention belongs to the technical fields of display panel, and in particular to a kind of measurement method of display panel cutting accuracy and
Display panel.
Technical background
Liquid crystal panel field mostly uses greatly the special-shaped processing mode cut or grind to the corner portion of display panel at present
(being referred to as special-shaped cutting technique), and whether the precision of special-shaped angle cutting meets the requirements and plays decision to subsequent processing procedure processing and fabricating
Sexual factor,
Following manner is mainly taken in the chamfering precision measure in industry at this stage: personnel's use is measured microscopically, according to point
Vertical range between disconnected cut label and beveling line, the size of bevelled edge is calculated using formula.This measurement method measurement essence
It is high to spend accuracy, number of errors rank is 50 μm, but this measurement method has the disadvantage in that
(1) at high cost, it needs in addition to buy special equipment, about 200,000/platform；
(2) time of measuring is long, and the single sheet measurement time is about 60s；
(3) sampling observation form can only be met, continuity monitoring can not be carried out.
Summary of the invention
Product test efficiency can be effectively improved the purpose of the present invention is to provide one kind and monitoring chamfering precision, reduction are subsequent
The bad incidence of processing procedure, play the role of the material loss of reduction portion display panel cutting accuracy measurement method and display panel.
Technical scheme is as follows:
The invention discloses a kind of measurement methods of display panel cutting accuracy, include the following steps:
S1: confirmation is by the vertex of cutting angle；
S2: it according to vertex, is extracted in the way of magnification ratio by the rectangle where cutting angle；
S3: in rectangle, coordinate distribution is obtained first with scanning mode, computer is reused and calculates corresponding distribution letter
Number, that is, determine to be determined by the slope line or curve of cutting angle further according to the intersection point of slope line or curve and face plate edge line
Two cutting interface points；
S4: the pixel quantity that vertex is cut between interface point with two respectively is calculated by algorithm, according to camera pixel
Size is converted into corresponding position distance and obtains actual measurement distance；
S5: the difference by calculating actual measurement distance and panel designed distance obtains the cutting accuracy error of display panel
Value.
Preferably, described in step S3 first with scanning mode obtain coordinate distribution reuse computer calculate it is corresponding
Distribution function is specially following steps:
S31: using vertex position as starting point, multiple sweep starting points for having fixed width are taken along the x axis line by line in Y direction
Be scanned to panel, the coordinate for obtaining scan line and face plate edge contact point is P1 (X1, Y1), P2 (X2, Y2) ..., Pn
(Xn, Yn)；
S32: when the X-coordinate continuously existing repeatedly identical value of contact point Pi (Xi, Yi), contact point Pi (Xi, Yi) is true
It is set to the last one available point of cutting line, wherein i≤n；
S33: the coordinate P1 (X1, Y1) of contact point that computer is obtained according to scanning, P2 (X2, Y2) ..., Pi (Xi,
Yi corresponding distribution function) is calculated, that is, determines by the slope line or curve of cutting angle.
Preferably, described in step S3 first with scanning mode obtain coordinate distribution reuse computer calculate it is corresponding
Distribution function is specially following steps:
S31: using vertex position as starting point, multiple sweep starting points for having fixed width are taken along the y axis line by line in X-direction
Be scanned to panel, the coordinate for obtaining scan line and face plate edge contact point is P1 (X1, Y1), P2 (X2, Y2) ..., Pn
(Xn, Yn)；
S32: when the Y-coordinate continuously existing repeatedly identical value of contact point Pi (Xi, Yi), contact point Pi (Xi, Yi) is true
It is set to the last one available point of cutting line, wherein i≤n；
S33: the coordinate P1 (X1, Y1) of contact point that computer is obtained according to scanning, P2 (X2, Y2) ..., Pi (Xi,
Yi corresponding distribution function) is calculated, that is, determines by the slope line or curve of cutting angle.
Preferably, the slope line or curve and the cutting interface point of Y-axis are first cutting interface point, the slope line
Or curve and the cutting interface point of X-axis are second cutting interface point.
Preferably, the pixel quantity that the vertex is cut between interface point with two respectively is calculated, it is true according to pixel size
Recognize two cutting interface points and actually differs distance between X-axis and Y-axis with vertex respectively.
Preferably, magnification ratio described in step S2 is 1:1.2.
Preferably, the calculation method of cutting accuracy error amount described in step S5 are as follows:
X* camera pixel size=by cutting angle level measurement；
Y* camera pixel size=by cutting angle vertical measures；
Design value-(measured value+OFFSET)=cutting accuracy error amount；
Wherein, x is the pixel quantity that vertex and horizontal direction cut interface point；Y is that vertex and vertical direction cutting join
The pixel quantity of point；Camera pixel size is fixed value；OFFSET is camera error compensation value.
Preferably, the method for the vertex confirmation of the step S1 are as follows: image is generated using camera shooting display panel, is passed through
Image processing techniques confirms face plate edge, will carry out simulation intersection by the edge extended line of cutting angle, crosspoint is determined as vertex.
The invention also discloses a kind of display panel, using a kind of above-mentioned display panel cutting accuracy measurement method into
The cutting of row display panel.
The present invention can bring following the utility model has the advantages that the present invention solves display panel abnormal shape in liquid crystal display panel manufacturing industry cuts
Precision measure time longer problem is cut, improves production measurement efficiency, and effect is obvious in practical applications.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, the present invention is given furtherly
It is bright.
Fig. 1 is the schematic diagram after original image panel abnormal shape chamfering；
Fig. 2 is intensity profile situation schematic diagram at white line on panel；
Fig. 3 is special-shaped chamfering simulation vertex schematic diagram；
Fig. 4 is the cutting interface point schematic diagram in ideal；
Fig. 5 is the edge breakage of panel and flash schematic diagram in actual production；
Fig. 6 is the two cutting interface point schematic diagrames grabbed in practice；
Fig. 7 is after magnification ratio of the present invention by the rectangle schematic diagram where cutting angle；
Fig. 8 is scan method schematic diagram of the invention；
Fig. 9 is the slope line and two cutting interface point P, Q schematic diagrames that the present invention obtains；
Figure 10 is the schematic diagram of measurement the distance X and Y of vertex A of the present invention and cutting interface point P and Q.
Specific embodiment
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated
" only this ", can also indicate the situation of " more than one ".
Technical solution of the present invention is discussed in detail with specific embodiment below.
Fig. 1 is the schematic diagram after original image panel abnormal shape chamfering, for special-shaped chamfering simulation vertex method of determination, one
As be gray scale difference value using between original image panel and black environment, confirmation face plate edge is reached using image procossing principle
The purpose of line is intensity profile situation schematic diagram at the white line on panel as shown in Figure 2, finally confirms the special-shaped chamfering mould come
Quasi- vertex A is as shown in Figure 3.
It is simulated by the crosspoint of the extended line of face plate edge line by the vertex location A of cutting angle.It then proceedes to use
The mode of image procossing directly confirms two cuttings interface point P and Q of contoured cut line and panel, further according to one line justification of two o'clock
A cutting line out, Fig. 4 are the cutting interface point schematic diagrames in ideal.
But in the actual production process, as shown in figure 5, the sliver of the cutting machine edge not in place that will appear in specification is broken
Damage and flash, will lead to the above-mentioned direct two cutting interface point P and Q taken with image there are biggish error, influence pair
The accurate judgement of the cutting accuracy of special-shaped chamfering, is the two cutting interface points grabbed in practice as shown in Figure 6, therefore above-mentioned side
Case is only used in theory, is not used in actual production process.
The invention proposes a kind of measurement methods of display panel cutting accuracy, include the following steps:
S1: with the generation image of camera shooting display panel, face plate edge is confirmed by image processing techniques, will be cut
The edge extended line at angle carries out simulation intersection, and crosspoint is determined as vertex A；
S2: it according to the vertex A simulated, is extracted in the way of magnification ratio by the rectangle where cutting angle；
S3: in rectangle, coordinate distribution is obtained first with scanning mode, computer is reused and calculates corresponding distribution letter
Number, that is, determine to be determined by the slope line or curve of cutting angle further according to the intersection point of slope line or curve and face plate edge line
Two cutting interface points；
S4: the pixel quantity between vertex and two cutting interface points is calculated by algorithm, according to camera pixel size
(i.e. camera pixel resolution) is converted into corresponding position distance and obtains actual measurement distance；
S5: the difference by calculating actual measurement distance and display panel designed distance obtains the cutting accuracy of display panel
Error amount.
Preferably, magnification ratio described in step S2 is generally chosen for 1:1.2, magnification ratio can also according to the actual situation into
Row adjustment.
Described in step S3 " coordinate distribution is obtained first with scanning mode, computer is reused and calculates corresponding distribution
The specific steps of function " are as follows:
S31: using the vertex location A simulated as starting point, taking in Y direction (i.e. vertical direction) multiple has fixed width
Sweep starting point is scanned to panel line by line along the x axis (i.e. horizontal direction), obtains scan line and face plate edge contact point
Coordinate be P1 (X1, Y1), P2 (X2, Y2) ..., Pn (Xn, Yn)；
S32: when multiple (such as ten times) identical value continuously occurs in the X-coordinate of contact point Pi (Xi, Yi), by contact point Pi
(Xi, Yi) is determined as the last one available point of cutting line, wherein i≤n；
S33: computer according to scanning obtain the coordinate P1 (X1, Y1) being had point of contact, P2 (X2, Y2) ..., Pi
Corresponding distribution function is calculated in (Xi, Yi), that is, determines by the slope line or curve of cutting angle.
Wherein, scanning direction described in step S31 may be and take multiple to have fixed width in X-direction (i.e. horizontal direction)
The sweep starting point of degree is scanned to panel line by line along the y axis (i.e. vertical direction), about contact point Pi in subsequent step
Whether (Xi, Yi) is that the confirmation of available point should also be adjusted to the confirmation to Y-coordinate value.
In addition, described in step S32 " when multiple (such as ten times) continuously occur identical for the X-coordinate of contact point Pi (Xi, Yi)
When value ", such case generally refers to scanning to the faceplate part not cut (when i.e. X-coordinate is 0), but because of panel edges
The presence of edge breakage and flash, it is also possible to contact point Pi (Xi, Yi) appears in breakage/flash when confirming the validity and goes out,
But subsequent function, which is calculated, to be not present by the slope line or curve of cutting angle influences.
Preferably, the calculation method of cutting accuracy error amount described in step S5 are as follows:
X* camera pixel size=by cutting angle level measurement；
Y* camera pixel size=by cutting angle vertical measures；
Design value-(measured value+OFFSET)=cutting accuracy error amount；
Wherein, x is the pixel quantity that vertex and horizontal direction cut interface point；Y is that vertex and vertical direction cutting join
The pixel quantity of point；Camera pixel size is fixed value；OFFSET is camera error compensation value；Design value is before panel is cut
Theoretical Design value.
It is specifically described below using special-shaped chamfering as bevel edge as embodiment.
For display panel by the measurement method for the cutting accuracy that cutting angle is bevel edge, including the following contents:
Step 1: generating image with camera shooting display panel, face plate edge is confirmed by image processing techniques, will be cut
The edge extended line of chamfer carries out simulation intersection, and crosspoint is determined as vertex A.
Step 2: as shown in fig. 7, extracting and being cut in such a way that magnification ratio is 1:1.2 according to the vertex A simulated
Rectangle where angle.
Step 3: as shown in figure 8, using the position where the vertex A simulated as starting point, being taken in Y direction in rectangle
Multiple sweep starting points for having fixed width are scanned to panel line by line along the x axis, are obtained scan line and are contacted with face plate edge
Point coordinate be P1 (X1, Y1), P2 (X2, Y2) ..., Pn (Xn, Yn)；Wherein, first scan line and face plate edge connect
Contact is P1 (X1, Y1), and the contact point of Article 2 scan line and face plate edge is P2 (X2, Y2) ... and so on, works as contact
When multiple (such as ten times) identical value continuously occurs in the X-coordinate of point Pi (Xi, Yi), contact point Pi (Xi, Yi) is determined as cutting
The last one available point of line, wherein i≤n；
Computer according to scanning obtain the coordinate P1 (X1, Y1) being had point of contact, P2 (X2, Y2) ..., Pi (Xi,
Yi corresponding distribution function) is calculated, that is, determines by the slope line or curve of cutting angle, further according to slope line or curve with
The intersection point of face plate edge line determines two cutting interface points, wherein slope line and the cutting interface point of Y-axis are P, slope line with
The cutting interface point of X-axis is Q, and obtained slope line and two cutting interface points P, Q are as shown in Figure 9.
Step 4: pixel quantity y, the vertex A and cutting for calculating vertex A respectively by algorithm and cutting between interface point P are handed over
Pixel quantity x between contact Q determines vertex A further according to camera pixel size and cuts the actual measurement between interface point P, Q
Distance.
Step 5: as shown in Figure 10, by formula calculate vertex A respectively with two cut interface point P, Q actual measurement away from
The cutting accuracy error amount of display panel is obtained from the difference with panel designed distance；The calculating of the cutting accuracy error amount
Method are as follows:
X* camera pixel size=by cutting angle level measurement (i.e. vertex A and cutting interface point Q measure distance X)；
Y* camera pixel size=by cutting angle vertical measures (i.e. vertex A and cutting interface point P measure distance Y)；
Design value-(measured value+OFFSET)=cutting accuracy error amount；
Wherein, camera pixel size is fixed value；OFFSET is camera error compensation value；Design value is before panel is cut
Theoretical Design value.
The present invention solves the problems, such as that display panel abnormal shape cutting accuracy time of measuring is longer in liquid crystal display panel manufacturing industry, can
Product test efficiency and monitoring chamfering precision are effectively improved, the bad incidence of follow-up process is reduced, improves production measurement effect
Rate, and effect is obvious in practical applications.
It should be noted that the above is only a preferred embodiment of the present invention, but the present invention is not limited to above-mentioned
Detail in embodiment, it is noted that for those skilled in the art, in technology of the invention
In conception range, various improvements and modifications may be made without departing from the principle of the present invention, to technology of the invention
Scheme carries out a variety of equivalents, these are improved, retouching and equivalents also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of measurement method of display panel cutting accuracy, which comprises the steps of:
S1: confirmation is by the vertex of cutting angle；
S2: it according to vertex, is extracted in the way of magnification ratio by the rectangle where cutting angle；
S3: in rectangle, obtaining coordinate distribution first with scanning mode, reuse computer and calculate corresponding distribution function,
It determines by the slope line or curve of cutting angle, determines two further according to the intersection point of slope line or curve and face plate edge line
Cut interface point；
S4: the pixel quantity that vertex is cut between interface point with two respectively is calculated by algorithm, according to camera pixel size
It is converted into corresponding position distance and obtains actual measurement distance；
S5: the difference by calculating actual measurement distance and panel designed distance obtains the cutting accuracy error amount of display panel.
2. a kind of measurement method of display panel cutting accuracy according to claim 1, which is characterized in that described in step S3
Obtain coordinate distribution first with scanning mode to reuse computer to calculate corresponding distribution function be specially following steps:
S31: using vertex position as starting point, take multiple sweep starting points for having fixed width along the x axis line by line to face in Y direction
Plate is scanned, the coordinate for obtaining scan line and face plate edge contact point is P1 (X1, Y1), P2 (X2, Y2) ..., Pn (Xn,
Yn)；
S32: when the X-coordinate continuously existing repeatedly identical value of contact point Pi (Xi, Yi), contact point Pi (Xi, Yi) is determined as
The last one available point of cutting line, wherein i≤n；
S33: the coordinate P1 (X1, Y1) of contact point that computer is obtained according to scanning, P2 (X2, Y2) ..., Pi (Xi, Yi) counts
Calculation obtains corresponding distribution function, that is, determines by the slope line or curve of cutting angle.
3. a kind of measurement method of display panel cutting accuracy according to claim 1, which is characterized in that described in step S3
Obtain coordinate distribution first with scanning mode to reuse computer to calculate corresponding distribution function be specially following steps:
S31: using vertex position as starting point, take multiple sweep starting points for having fixed width along the y axis line by line to face in X-direction
Plate is scanned, the coordinate for obtaining scan line and face plate edge contact point is P1 (X1, Y1), P2 (X2, Y2) ..., Pn (Xn,
Yn)；
S32: when the Y-coordinate of contact point Pi (Xi, Yi) continuously multiple identical value occurs, contact point Pi (Xi, Yi) is determined
For the last one available point of secant, wherein i≤n；
S33: the coordinate P1 (X1, Y1) of contact point that computer is obtained according to scanning, P2 (X2, Y2) ..., Pi (Xi, Yi) counts
Calculation obtains corresponding distribution function, that is, determines by the slope line or curve of cutting angle.
4. a kind of measurement method of display panel cutting accuracy according to claim 2 or 3, which is characterized in that described oblique
Rate line or curve and the cutting interface point of Y-axis are first cutting interface point, and the cutting of the slope line or curve and X-axis joins
Point is second cutting interface point.
5. a kind of measurement method of display panel cutting accuracy according to claim 4, which is characterized in that calculate the top
Point respectively two cut interface points between pixel quantity, according to pixel size confirm two cutting interface points respectively with vertex
Distance is actually differed between X-axis and Y-axis.
6. a kind of measurement method of display panel cutting accuracy according to claim 1, which is characterized in that described in step S2
Magnification ratio be 1:1.2.
7. a kind of measurement method of display panel cutting accuracy according to claim 1, which is characterized in that described in step S5
The calculation method of cutting accuracy error amount are as follows:
X* camera pixel size=by cutting angle level measurement；
Y* camera pixel size=by cutting angle vertical measures；
Design value-(measured value+OFFSET)=cutting accuracy error amount；
Wherein, x is the pixel quantity that vertex and horizontal direction cut interface point；Y is that vertex and vertical direction cut interface point
Pixel quantity；Camera pixel size is fixed value；OFFSET is camera error compensation value.
8. a kind of measurement method of display panel cutting accuracy according to claim 1, which is characterized in that the step S1
Vertex confirmation method are as follows: using camera shooting display panel generate image, by image processing techniques confirm face plate edge,
Simulation intersection will be carried out by the edge extended line of cutting angle, crosspoint is determined as vertex.
9. a kind of display panel, which is characterized in that cut essence using a kind of any display panel of claim 1-3,5-8
The measurement method of degree carries out the cutting of display panel.
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