CN114002232A - Liquid crystal display panel cutting detection method - Google Patents
Liquid crystal display panel cutting detection method Download PDFInfo
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- CN114002232A CN114002232A CN202111113608.1A CN202111113608A CN114002232A CN 114002232 A CN114002232 A CN 114002232A CN 202111113608 A CN202111113608 A CN 202111113608A CN 114002232 A CN114002232 A CN 114002232A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N2021/9513—Liquid crystal panels
Abstract
The invention relates to a liquid crystal display panel cutting detection method, comprising S1, detecting the cutting edge of the display panel; s2, performing electrical color detection on the display panel with qualified edge detection; and S3, grading the display panel according to the cutting edge condition and the color detection condition. When the liquid crystal display panel is cut and detected, the display panel is graded according to the cutting edge condition and the color detection condition, the cutting quality of the display panel is accurately determined, and a solid foundation is provided for the cutting regulation and control of the panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a cutting detection method for a liquid crystal display panel.
Background
In the production process of the liquid crystal display panel, the yield of the liquid crystal display panel needs to be detected, and problems need to be found and repaired in time. With the increasing requirement of smart phones on the resolution of liquid crystal display panels, the technology of manufacturing TFT array substrates using low-temperature polysilicon as a semiconductor material becomes mainstream, and the requirement for the yield detection of liquid crystal display panels is also increased. At present, the method for detecting the yield of liquid crystal display panels known in the industry is to drive the independent liquid crystal display panels one by one, however, the method needs to firstly assemble the large-sized TFT array substrate corresponding to the plurality of liquid crystal display panels and the color filter substrate to form a liquid crystal display mother board comprising the plurality of liquid crystal display panels, and then the independent liquid crystal display panels with specific sizes can be obtained after the processes of one-time cutting, thinning, secondary cutting and offset pasting.
Disclosure of Invention
Therefore, the invention provides a method for detecting the cutting of a liquid crystal display panel, which is used for solving the problems that the detection and evaluation method in the prior art is single and the product cannot be accurately graded.
In order to achieve the above object, the present invention provides a method for detecting cutting of a liquid crystal display panel, comprising,
s1, detecting the cutting edge of the display panel;
s2, performing electrical color detection on the display panel with qualified edge detection;
s3, grading the display panel according to the cutting edge condition and the color detection condition;
the step S1 includes the steps of,
s11, placing the panel to be detected on the panel storage table, closing the appearance detection box and creating a dark detection environment;
s12, the central control module respectively controls the first movable frame and the illuminating lamp to be started, the illuminating lamp irradiates the edge of the panel to be detected and moves along the outline of the edge of the panel, the second movable frame drives the high-definition camera and the illuminating lamp to move synchronously, the high-definition camera performs continuous reading shooting on the edge of the panel to be detected and transmits the shot pictures to the central control module;
s13, the central control module integrates the photos to generate a panel edge image A, and the central control module analyzes the panel edge image A to judge whether the cut edge is qualified;
the step S2 includes the steps of,
s21, the central control module controls the electric detection box to release a standard green light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image;
s21a, when the panel has uniform brightness and no black spot or aperture exists, the central control module performs color analysis on the image to determine the RGB value of the panel under the standard green light signal;
s21b, when the panel brightness is not uniform or there are black spots and aperture, the central control module judges the panel is unqualified;
s22, the central control module controls the electric detection box to release standard red light signals, the color camera shooting panel is in a state after being lighted, the shot images are transmitted to the central control module, and the central control module analyzes the shot images and determines the RGB values of the panel under the standard red light signals;
s23, the central control module controls the electric detection box to release a standard blue light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image and determines the RGB value of the panel under the standard blue light signal;
and S24, integrating RGB in different modes by the central control module, and calculating color scores.
Furthermore, when the cut edge of the display panel is detected, an appearance detection box is arranged, and comprises a panel storage table, a first movable frame, a lighting lamp, a second movable frame, a high-definition camera and a central control module;
the panel storage table is arranged in the appearance detection box and used for placing a display panel to be detected, and the panel storage table is made of transparent materials;
the first movable rack is arranged below the panel storage table
The illuminating lamp is arranged on the first movable frame;
the second movable rack is arranged above the panel storage table
The high-definition camera is arranged on the second movable frame;
in step S13, the central control module integrates the photos to generate a panel edge image a, the central control module analyzes the panel edge image a,
when the edge image of the panel has cracks, the central control module judges that the panel to be detected is unqualified;
when no crack exists in the edge image of the panel, the central control module analyzes the crack to judge the quality of the panel;
when no crack is found in the edge image of the panel and no crack is found, the central control module judges that the edge of the panel is cut to be qualified;
when the central control module judges that the edge of the panel is cut to be qualified, the central control module controls the manipulator to convey the panel to the electrical detection box to carry out electrical detection on the panel.
Further, when no crack exists in the edge image of the panel, the central control module detects the depth B of the crack and the width C of the crack, and the central control module calculates a crack score D according to the depth B and the width C, where B is a calculation compensation parameter of the depth B of the crack to the crack score D, C is a calculation compensation parameter of the width C of the crack to the crack score D,
the central control module is internally provided with a mouth collapse score parameter Dp, the central control module compares the mouth collapse score D with the mouth collapse score parameter Dp,
when D is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when D is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
Furthermore, a calculated compensation parameter value b1 of the depth-to-breakout score of the first preset breakout, a calculated compensation parameter value b2 of the depth-to-breakout score of the second preset breakout, a calculated compensation parameter value b3 of the depth-to-breakout score of the third preset breakout, a first preset depth evaluation value Bz1, and a second preset depth evaluation value Bz2 are set in the central control module, wherein b1 is more than b2 and less than b3, and Bz1 is more than Bz 2;
the central control module compares the depth B of the breakout with a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2,
when B is less than or equal to Bz1, the central control module selects a calculation compensation parameter value B1 of the depth-to-oral-cavity score of a first preset oral cavity as a calculation compensation parameter B of the depth-to-oral-cavity score D of the oral cavity;
when Bz1 is larger than B and is not larger than Bz2, the central control module selects a calculation compensation parameter value B2 of the depth-to-breakout score of a second preset breakout as a calculation compensation parameter B of the depth-to-breakout score D of the breakout;
and when B is larger than Bz2, the central control module selects a calculation compensation parameter value B3 of the depth-to-uterine opening score of a third preset uterine opening as a calculation compensation parameter B of the depth-to-uterine opening score D of the uterine opening.
Furthermore, a calculation compensation parameter value c1 of the width of the first preset breakout to the breakout score, a calculation compensation parameter value c2 of the width of the second preset breakout to the breakout score, a calculation compensation parameter value c3 of the width of the third preset breakout to the breakout score, a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2 are also arranged in the central control module, wherein c1 < c2 < c3 and Cz1 < Cz 2;
the central control module compares the width C of the breakout with a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2,
when C is less than or equal to Cz1, the central control module selects a calculation compensation parameter value C1 of the width of a first preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
when Cz1 is larger than or equal to Cz2, the central control module selects a calculation compensation parameter value C2 of the width of a second preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
and when C is larger than Cz2, the central control module selects a calculation compensation parameter value C3 of the width-to-oral-break score of a third preset oral break as a calculation compensation parameter C of the width-to-oral-break score D of the oral break.
Further, when N breakouts exist in the panel edge image a, the central control module calculates a first breakout score D1, a second breakout score D2, and a … nth breakout score DN according to the method for calculating the breakout score D, and the central control module calculates a total breakout score Dz, wherein Dz is D1+ D2+ … + DN;
the central control module compares the total oral collapse score Dz with the oral collapse score parameter Dp,
when Dz is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when Dz is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
Furthermore, a first preset collapse quantity evaluation parameter M1, a second preset collapse quantity evaluation parameter M2, a first preset collapse score parameter Dp1, a second preset collapse score parameter Dp2 and a third preset collapse score parameter Dp3 are arranged in the central control module, wherein M1 is less than M2, and Dp1 is greater than Dp2 and is greater than Dp 3;
when only 1 metrorrhagia exists in the panel edge image A, the central control module selects a first preset metrorrhagia score parameter value Dp1 as a metrorrhagia score parameter Dp;
when N breakouts exist in the panel edge image A, the central control module compares the number N of the breakouts with a first preset number evaluation parameter M1 and a second preset number evaluation parameter M2,
when N is less than or equal to M1, the central control module selects a first preset breakout score parameter value Dp1 as a breakout score parameter Dp;
when the M1 is more than or equal to M2, the central control module selects a second preset breakout score parameter value Dp2 as a breakout score parameter Dp;
and when N is larger than M2, the central control module selects a third preset breakout score parameter value Dp3 as the breakout score parameter Dp.
Further, in step S2, the central control module determines RGB values (X1, Y1, Z1) of the panel under a standard green light signal, the central control module is provided with the standard green light value (0, 255,0), the central control module calculates a green light deviation value W1 according to (X1, Y1, Z1), W1 is X1 × g1+ (255-Y1) × g2+ Z1 × g3, wherein g1 is a first preset calculation compensation parameter of the green light deviation value, g2 is a second preset calculation compensation parameter of the green light deviation value, and g3 is a third preset calculation compensation parameter of the green light deviation value;
the central control module determines RGB values (X2, Y2 and Z2) of the panel under a standard red light signal, standard red light values (255,0 and 0) are arranged in the central control module, the central control module calculates a red light deviation value W2 according to (X2, Y2 and Z2), W2 is (255-X2) X r1+ Y2X r2+ Z2X r3, wherein r1 is a first preset calculation compensation parameter of the red light deviation value, r2 is a second preset calculation compensation parameter of the red light deviation value, and r3 is a third preset calculation compensation parameter of the red light deviation value;
the central control module determines RGB values (X3, Y3 and Z3) of the panel under a standard blue light signal, standard blue light values (0,0 and 255) are arranged in the central control module, and the central control module calculates a blue light deviation value W3 according to (X3, Y3 and Z3), wherein the W3 is X3 × u1+ Y3 × u2+ (255-Z3) × u3, u1 is a first preset calculation compensation parameter of the blue light, u2 is a second preset calculation compensation parameter of the blue light deviation value, and u3 is a third preset calculation compensation parameter of the blue light deviation value;
the central control module calculates RGB color scores E according to green light deviation values W1, red light deviation values W2 and blue light deviation values W3, wherein E is W1 xq 1+ W2 xq 2+ W3 xq 3, q1 is a compensation parameter calculated by green light deviation values on color scores, q2 is a compensation parameter calculated by red light deviation values on color scores, and q3 is a compensation parameter calculated by blue light deviation values on color scores;
the inside of the central control module is provided with an RGB color scoring standard value Ez, the central control module compares the RGB color scoring E with the RGB color scoring standard value Ez,
when E is less than or equal to Ez, the central control module judges that the electrical color detection of the display panel is qualified;
and when E is larger than Ez, the central control module judges that the electric color detection of the display panel is unqualified.
Furthermore, a first preset display panel score Q1 and a second preset display panel score Q2 are arranged in the central control module, the central control module calculates the display panel score Q according to the total score Dz of the breakout and the RGB color score E, Q is Dz × p1+ E × p2, wherein p1 is a compensation parameter for calculating the score of the breakout on the display panel, p2 is a compensation parameter for calculating the score of the RGB color score on the display panel, the central control module compares the score Q of the display panel with the first preset display panel score Q1 and the second preset display panel score Q2,
when Q is not more than Q1, the central control module judges the quality of the display panel to be excellent;
when Q is more than Q1 and less than or equal to Q2, the central control module judges that the quality of the display panel is good;
when Q is larger than Q2, the central control module judges the quality of the display panel to be qualified.
Compared with the prior art, the invention has the advantages that when the liquid crystal display panel is cut and detected, the display panel is graded according to the cutting edge condition and the color detection condition, the cutting quality of the display panel is accurately determined, and a solid foundation is provided for the cutting regulation and control of the panel.
Further, in step S13, the central control module integrates the photos to generate a panel edge image a, the central control module analyzes the panel edge image a, and when there is a crack in the panel edge image, the central control module determines that the panel to be detected is not qualified; when no crack exists in the edge image of the panel, the central control module analyzes the crack to judge the quality of the panel; when no crack is found in the edge image of the panel and no crack is found, the central control module judges that the edge of the panel is cut to be qualified; when the central control module judges that the edge of the panel is cut to be qualified, the central control module controls the manipulator to convey the panel to the electrical detection box to carry out electrical detection on the panel. The central control module is arranged during color evaluation, automatic identification and judgment are carried out through the central control module during panel cutting image detection, accuracy of judgment results of increase and decrease of manual participation is reduced, and detection speed is improved.
Particularly, when the edge image of the panel has no crack and has a crack, the central control module detects the depth B and the width C of the crack, the central control module calculates the crack score D according to the depth B and the width C, the central control module is internally provided with a crack score parameter Dp, the central control module compares the crack score D with the crack score parameter Dp, when the edge image of the panel has a crack, the crack is smaller, the display function of the panel is not influenced, the crack is larger, the display function of the panel is influenced, the crack score is calculated according to the depth of the crack and the width of the crack, the higher the score is, the larger the crack is, the larger the display influence is, the crack score parameter is set, the crack score parameter is compared with the crack score parameter, the judgment of the cut image of the panel is more accurate, and the detection speed is improved.
Particularly, a calculated compensation parameter value b1 of the depth-to-breakout score of a first preset breakout, a calculated compensation parameter value b2 of the depth-to-breakout score of a second preset breakout, a calculated compensation parameter value b3 of the depth-to-breakout score of a third preset breakout, a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2 are arranged in the central control module, wherein b1 is more than b2 and less than b3, and Bz1 is more than Bz 2; the central control module compares the depth B of the breakout with a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2 to select a calculation compensation parameter of the depth of the breakout for scoring the breakout, when the depth of the breakout is larger, the problem of cracking of the breakout is more likely to occur in use, and the numerical value of the calculation compensation parameter B is increased along with the increase of the depth of the breakout, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
Particularly, a calculated compensation parameter value c1 of the width of a first preset breakout on the breakout score, a calculated compensation parameter value c2 of the width of a second preset breakout on the breakout score, a calculated compensation parameter value c3 of the width of a third preset breakout on the breakout score, a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2 are further arranged in the central control module, wherein c1 < c2 < c3, and Cz1 < Cz 2; the central control module compares the width C of the breakout with a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2, selects a calculation compensation parameter of the width of the breakout to the breakout score, when the width of the breakout is larger, the breakout is more likely to have the edge falling problem in use, and the value of the calculation compensation parameter b is increased along with the increase of the width of the breakout, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
Further, when N breakouts exist in the panel edge image a, the central control module calculates a first breakout score D1, a second breakout score D2, and a … nth breakout score DN according to the method for calculating the breakout score D, and the central control module calculates a total breakout score Dz, wherein Dz is D1+ D2+ … + DN; the central control module compares the total oral collapse score Dz with the oral collapse score parameter Dp, calculates the total oral collapse score when a plurality of oral collapses exist in the panel, and compares the total oral collapse score with the oral collapse score parameter, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is improved.
Particularly, when only 1 slot exists in the panel edge image a, the central control module selects a first preset slot scoring parameter value Dp1 as a slot scoring parameter Dp; when N breakouts exist in the panel edge image A, the central control module compares the number N of the breakouts with a first preset number evaluation parameter M1 of the breakouts and a second preset number evaluation parameter M2 of the breakouts, when the number of the breakouts is larger, the probability that the panel has quality problems such as cracking and falling in use is higher, the numerical value of the breaking score parameter is reduced according to the increase of the number of the breakouts, the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
Further, when the display panel is electrically detected, the color development values of the display panel in all states are detected according to the red, green and blue standard electric signals, and RGB color scoring is performed on the display panel according to the displayed colors so as to judge whether the color of the display panel is qualified or not, so that the judgment on the detection of the panel cutting image is more accurate, and the detection speed is increased.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting the cutting of a liquid crystal display panel according to the present invention;
FIG. 2 is a schematic view of the appearance inspection box according to the present invention;
FIG. 3 is a cross-sectional view of the appearance inspection box of the present invention;
fig. 4 is a schematic view of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic flow chart of a method for cutting and inspecting a liquid crystal display panel according to the present invention, the present invention discloses a method for cutting and inspecting a liquid crystal display panel, comprising,
s1, detecting the cutting edge of the display panel;
s2, performing electrical color detection on the display panel with qualified edge detection;
s3, grading the display panel according to the cutting edge condition and the color detection condition;
the step S1 includes the steps of,
s11, placing the panel to be detected on the panel storage table, closing the appearance detection box and creating a dark detection environment;
s12, the central control module respectively controls the first movable frame and the illuminating lamp to be started, the illuminating lamp irradiates the edge of the panel to be detected and moves along the outline of the edge of the panel, the second movable frame drives the high-definition camera and the illuminating lamp to move synchronously, the high-definition camera performs continuous reading shooting on the edge of the panel to be detected and transmits the shot pictures to the central control module;
s13, the central control module integrates the photos to generate a panel edge image A, and the central control module analyzes the panel edge image A to judge whether the cut edge is qualified;
the step S2 includes the steps of,
s21, the central control module controls the electric detection box to release a standard green light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image;
s21a, when the panel has uniform brightness and no black spot or aperture exists, the central control module performs color analysis on the image to determine the RGB value of the panel under the standard green light signal;
s21b, when the panel brightness is not uniform or there are black spots and aperture, the central control module judges the panel is unqualified;
s22, the central control module controls the electric detection box to release standard red light signals, the color camera shooting panel is in a state after being lighted, the shot images are transmitted to the central control module, and the central control module analyzes the shot images and determines the RGB values of the panel under the standard red light signals;
s23, the central control module controls the electric detection box to release a standard blue light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image and determines the RGB value of the panel under the standard blue light signal;
and S24, integrating RGB in different modes by the central control module, and calculating color scores.
When the liquid crystal display panel is cut and detected, the display panel is graded according to the cutting edge condition and the color detection condition, the cutting quality of the display panel is accurately determined, and a solid foundation is provided for the cutting regulation and control of the panel.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of the appearance inspection box according to the present invention; FIG. 3 is a cross-sectional view of the appearance inspection box of the present invention;
when the cut edge of the display panel is detected, the appearance detection box 1 is arranged, and the appearance detection box 1 comprises a panel storage table 2, a first moving frame 3, a lighting lamp 6, a second moving frame 4, a high-definition camera 7 and a central control module 5;
the panel storage table 2 is arranged in the appearance detection box 1 and used for placing a display panel to be detected, and the panel storage table 2 is made of transparent materials;
the first movable rack 3 disposed below the panel storage table 2
The illuminating lamp 6 is arranged on the first moving frame 3;
the second movable rack 4 disposed above the panel storage table 2
The high-definition camera 7 is arranged on the second movable frame 4;
in step S13, the central control module integrates the photos to generate a panel edge image a, the central control module analyzes the panel edge image a,
when the edge image of the panel has cracks, the central control module judges that the panel to be detected is unqualified;
when no crack exists in the edge image of the panel, the central control module analyzes the crack to judge the quality of the panel;
when no crack is found in the edge image of the panel and no crack is found, the central control module judges that the edge of the panel is cut to be qualified;
when the central control module judges that the edge of the panel is cut to be qualified, the central control module controls the manipulator to convey the panel to the electrical detection box to carry out electrical detection on the panel.
The central control module is arranged during color evaluation, automatic identification and judgment are carried out through the central control module during panel cutting image detection, accuracy of judgment results of increase and decrease of manual participation is reduced, and detection speed is improved.
Please continue to refer to fig. 4, which is a schematic diagram of the present invention,
when no crack exists in the edge image of the panel, the central control module detects the depth B of the crack and the width C of the crack, the central control module calculates the crack score D according to the depth B and the width C, D is B multiplied by B + C multiplied by C, wherein B is a calculation compensation parameter of the depth B of the crack to the crack score D, C is a calculation compensation parameter of the width C of the crack to the crack score D,
the central control module is internally provided with a mouth collapse score parameter Dp, the central control module compares the mouth collapse score D with the mouth collapse score parameter Dp,
when D is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when D is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
When the edge image of the panel has the breakout, the breakout is small, the display function of the panel is not influenced, the breakout is large, the display function of the panel is influenced, the breakout score is calculated through the depth of the breakout and the width of the breakout, the score is high, the breakout is large, the display influence is large, the breakout score parameter is set, the breakout score is compared with the breakout score parameter, the judgment of the panel cutting image detection is accurate, and the detection speed is increased.
The central control module is internally provided with a calculation compensation parameter value b1 of the depth-to-breakout score of a first preset breakout, a calculation compensation parameter value b2 of the depth-to-breakout score of a second preset breakout, a calculation compensation parameter value b3 of the depth-to-breakout score of a third preset breakout, a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2, wherein b1 is more than b2 and more than b3, and Bz1 is more than Bz 2;
the central control module compares the depth B of the breakout with a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2,
when B is less than or equal to Bz1, the central control module selects a calculation compensation parameter value B1 of the depth-to-oral-cavity score of a first preset oral cavity as a calculation compensation parameter B of the depth-to-oral-cavity score D of the oral cavity;
when Bz1 is larger than B and is not larger than Bz2, the central control module selects a calculation compensation parameter value B2 of the depth-to-breakout score of a second preset breakout as a calculation compensation parameter B of the depth-to-breakout score D of the breakout;
and when B is larger than Bz2, the central control module selects a calculation compensation parameter value B3 of the depth-to-uterine opening score of a third preset uterine opening as a calculation compensation parameter B of the depth-to-uterine opening score D of the uterine opening.
When the depth of the crack is larger, the crack problem is easy to occur in the use of the crack, and the numerical value of the calculated compensation parameter b is increased along with the increase of the depth of the crack, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is improved.
The central control module is also internally provided with a calculation compensation parameter value c1 of the width of a first preset breakout for breakout scoring, a calculation compensation parameter value c2 of the width of a second preset breakout for breakout scoring, a calculation compensation parameter value c3 of the width of a third preset breakout for scoring breakout, a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2, wherein c1 < c2 < c3, and Cz1 < Cz 2;
the central control module compares the width C of the breakout with a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2,
when C is less than or equal to Cz1, the central control module selects a calculation compensation parameter value C1 of the width of a first preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
when Cz1 is larger than or equal to Cz2, the central control module selects a calculation compensation parameter value C2 of the width of a second preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
and when C is larger than Cz2, the central control module selects a calculation compensation parameter value C3 of the width-to-oral-break score of a third preset oral break as a calculation compensation parameter C of the width-to-oral-break score D of the oral break.
When the width of the notch is larger, the notch is more prone to edge falling in use, the numerical value of the calculated compensation parameter b is increased along with the increase of the notch width, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
When N breakouts exist in the panel edge image a, the central control module calculates a first breakout score D1, a second breakout score D2 and a … nth breakout score DN according to the method for calculating the breakout score D, and the central control module calculates a total breakout score Dz, wherein Dz is D1+ D2+ … + DN;
the central control module compares the total oral collapse score Dz with the oral collapse score parameter Dp,
when Dz is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when Dz is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
When a plurality of breakouts exist in the panel, the total score of the breakouts is calculated, and the total score of the breakouts is compared with the total score of the breakouts and the score parameters of the breakouts, so that the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
A first preset collapse quantity evaluation parameter M1, a second preset collapse quantity evaluation parameter M2, a first preset collapse score parameter Dp1, a second preset collapse score parameter Dp2 and a third preset collapse score parameter Dp3 are arranged in the central control module, wherein M1 is more than M2, Dp1 is more than Dp2 and more than Dp 3;
when only 1 metrorrhagia exists in the panel edge image A, the central control module selects a first preset metrorrhagia score parameter value Dp1 as a metrorrhagia score parameter Dp;
when N breakouts exist in the panel edge image A, the central control module compares the number N of the breakouts with a first preset number evaluation parameter M1 and a second preset number evaluation parameter M2,
when N is less than or equal to M1, the central control module selects a first preset breakout score parameter value Dp1 as a breakout score parameter Dp;
when the M1 is more than or equal to M2, the central control module selects a second preset breakout score parameter value Dp2 as a breakout score parameter Dp;
and when N is larger than M2, the central control module selects a third preset breakout score parameter value Dp3 as the breakout score parameter Dp.
When the number of the openings is more, the probability that the panel has quality problems such as cracking and falling in use is higher, the numerical value of the opening scoring parameter is reduced according to the increase of the number of the openings, the judgment of the panel cutting image detection is more accurate, and the detection speed is increased.
In step S2, the central control module determines RGB values (X1, Y1, Z1) of the panel under a standard green light signal, the central control module is provided with the standard green light value (0, 255,0), the central control module calculates a green light deviation value W1 according to (X1, Y1, Z1), W1 is X1 × g1+ (255-Y1) × g2+ Z1 × g3, wherein g1 is a first preset calculated compensation parameter for the green light deviation value, g2 is a second preset calculated compensation parameter for the green light deviation value, and g3 is a third preset calculated compensation parameter for the green light;
the central control module determines RGB values (X2, Y2 and Z2) of the panel under a standard red light signal, standard red light values (255,0 and 0) are arranged in the central control module, the central control module calculates a red light deviation value W2 according to (X2, Y2 and Z2), W2 is (255-X2) X r1+ Y2X r2+ Z2X r3, wherein r1 is a first preset calculation compensation parameter of the red light deviation value, r2 is a second preset calculation compensation parameter of the red light deviation value, and r3 is a third preset calculation compensation parameter of the red light deviation value;
the central control module determines RGB values (X3, Y3 and Z3) of the panel under a standard blue light signal, standard blue light values (0,0 and 255) are arranged in the central control module, and the central control module calculates a blue light deviation value W3 according to (X3, Y3 and Z3), wherein the W3 is X3 × u1+ Y3 × u2+ (255-Z3) × u3, u1 is a first preset calculation compensation parameter of the blue light, u2 is a second preset calculation compensation parameter of the blue light deviation value, and u3 is a third preset calculation compensation parameter of the blue light deviation value;
the central control module calculates RGB color scores E according to green light deviation values W1, red light deviation values W2 and blue light deviation values W3, wherein E is W1 xq 1+ W2 xq 2+ W3 xq 3, q1 is a compensation parameter calculated by green light deviation values on color scores, q2 is a compensation parameter calculated by red light deviation values on color scores, and q3 is a compensation parameter calculated by blue light deviation values on color scores;
the inside of the central control module is provided with an RGB color scoring standard value Ez, the central control module compares the RGB color scoring E with the RGB color scoring standard value Ez,
when E is less than or equal to Ez, the central control module judges that the electrical color detection of the display panel is qualified;
and when E is larger than Ez, the central control module judges that the electric color detection of the display panel is unqualified.
When the display panel is electrically detected, the color development values of the display panel in various states are detected according to the red, green and blue standard electric signals, and RGB color grading is carried out on the display panel according to the displayed colors so as to judge whether the color of the display panel is qualified or not, so that the judgment on the detection of the panel cutting image is more accurate, and the detection speed is increased.
The central control module is internally provided with a first preset display panel score Q1 and a second preset display panel score Q2, the central control module calculates a display panel score Q according to the total score Dz of the breakout and the RGB color score E, Q is Dz multiplied by p1+ E multiplied by p2, wherein p1 is a compensation parameter for calculating the score of the breakout on the display panel, p2 is a compensation parameter for calculating the score of the RGB color score on the display panel, the central control module compares the score Q of the display panel with the first preset display panel score Q1 and the second preset display panel score Q2,
when Q is not more than Q1, the central control module judges the quality of the display panel to be excellent;
when Q is more than Q1 and less than or equal to Q2, the central control module judges that the quality of the display panel is good;
when Q is larger than Q2, the central control module judges the quality of the display panel to be qualified.
And grading the display panel according to the cutting edge condition and the color detection condition, accurately determining the cutting quality of the display panel, and providing a solid foundation for the cutting regulation and control of the panel.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A method for detecting the cutting of a liquid crystal display panel is characterized by comprising the following steps,
s1, detecting the cutting edge of the display panel;
s2, performing electrical color detection on the display panel with qualified edge detection;
s3, grading the display panel according to the cutting edge condition and the color detection condition;
the step S1 includes the steps of,
s11, placing the panel to be detected on the panel storage table, closing the appearance detection box and creating a dark detection environment;
s12, the central control module respectively controls the first movable frame and the illuminating lamp to be started, the illuminating lamp irradiates the edge of the panel to be detected and moves along the outline of the edge of the panel, the second movable frame drives the high-definition camera and the illuminating lamp to move synchronously, the high-definition camera performs continuous reading shooting on the edge of the panel to be detected and transmits the shot pictures to the central control module;
s13, the central control module integrates the photos to generate a panel edge image A, and the central control module analyzes the panel edge image A to judge whether the cut edge is qualified;
the step S2 includes the steps of,
s21, the central control module controls the electric detection box to release a standard green light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image;
s21a, when the panel has uniform brightness and no black spot or aperture exists, the central control module performs color analysis on the image to determine the RGB value of the panel under the standard green light signal;
s21b, when the panel brightness is not uniform or there are black spots and aperture, the central control module judges the panel is unqualified;
s22, the central control module controls the electric detection box to release standard red light signals, the color camera shooting panel is in a state after being lighted, the shot images are transmitted to the central control module, and the central control module analyzes the shot images and determines the RGB values of the panel under the standard red light signals;
s23, the central control module controls the electric detection box to release a standard blue light signal, the color camera shooting panel is in a state after being lighted, the shot image is transmitted to the central control module, and the central control module analyzes the shot image and determines the RGB value of the panel under the standard blue light signal;
and S24, integrating RGB in different modes by the central control module, and calculating color scores.
2. The method according to claim 1, wherein an appearance inspection box is provided when inspecting the cut edge of the display panel, the appearance inspection box comprises a panel storage table, a first movable frame, an illuminating lamp, a second movable frame, a high definition camera, and a central control module;
the panel storage table is arranged in the appearance detection box and used for placing a display panel to be detected, and the panel storage table is made of transparent materials;
the first movable rack is arranged below the panel storage table
The illuminating lamp is arranged on the first movable frame;
the second movable rack is arranged above the panel storage table
The high-definition camera is arranged on the second movable frame;
in step S13, the central control module integrates the photos to generate a panel edge image a, the central control module analyzes the panel edge image a,
when the edge image of the panel has cracks, the central control module judges that the panel to be detected is unqualified;
when no crack exists in the edge image of the panel, the central control module analyzes the crack to judge the quality of the panel;
when no crack is found in the edge image of the panel and no crack is found, the central control module judges that the edge of the panel is cut to be qualified;
when the central control module judges that the edge of the panel is cut to be qualified, the central control module controls the manipulator to convey the panel to the electrical detection box to carry out electrical detection on the panel.
3. The method according to claim 2, wherein the central control module detects a depth B of the breakout and a width C of the breakout when no crack exists in the edge image of the panel, and calculates a breakout score D according to the depth B and the width C, wherein B is a calculated compensation parameter of the depth B of the breakout to the breakout score D, C is a calculated compensation parameter of the width C of the breakout to the breakout score D,
the central control module is internally provided with a mouth collapse score parameter Dp, the central control module compares the mouth collapse score D with the mouth collapse score parameter Dp,
when D is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when D is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
4. The method for detecting the cutting of the liquid crystal display panel according to claim 3, wherein a calculated compensation parameter value b1 of the depth-to-break score of the first preset break, a calculated compensation parameter value b2 of the depth-to-break score of the second preset break, a calculated compensation parameter value b3 of the depth-to-break score of the third preset break, a first preset depth evaluation value Bz1, and a second preset depth evaluation value Bz2 are set in the central control module, wherein b1 < b2 < b3, and Bz1 < Bz 2;
the central control module compares the depth B of the breakout with a first preset depth evaluation value Bz1 and a second preset depth evaluation value Bz2,
when B is less than or equal to Bz1, the central control module selects a calculation compensation parameter value B1 of the depth-to-oral-cavity score of a first preset oral cavity as a calculation compensation parameter B of the depth-to-oral-cavity score D of the oral cavity;
when Bz1 is larger than B and is not larger than Bz2, the central control module selects a calculation compensation parameter value B2 of the depth-to-breakout score of a second preset breakout as a calculation compensation parameter B of the depth-to-breakout score D of the breakout;
and when B is larger than Bz2, the central control module selects a calculation compensation parameter value B3 of the depth-to-uterine opening score of a third preset uterine opening as a calculation compensation parameter B of the depth-to-uterine opening score D of the uterine opening.
5. The method for detecting the cutting of the liquid crystal display panel according to claim 4, wherein a calculated compensation parameter value c1 of the width to break score of the first preset break, a calculated compensation parameter value c2 of the width to break score of the second preset break, a calculated compensation parameter value c3 of the width to break score of the third preset break, a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2 are further arranged in the central control module, wherein c1 < c2 < c3 and Cz1 < Cz 2;
the central control module compares the width C of the breakout with a first preset width evaluation value Cz1 and a second preset width evaluation value Cz2,
when C is less than or equal to Cz1, the central control module selects a calculation compensation parameter value C1 of the width of a first preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
when Cz1 is larger than or equal to Cz2, the central control module selects a calculation compensation parameter value C2 of the width of a second preset breakout to the breakout score as a calculation compensation parameter C of the width C of the breakout to the breakout score D;
and when C is larger than Cz2, the central control module selects a calculation compensation parameter value C3 of the width-to-oral-break score of a third preset oral break as a calculation compensation parameter C of the width-to-oral-break score D of the oral break.
6. The method for detecting the cutting of the lcd panel according to claim 5, wherein when N number of breakouts exist in the panel edge image a, the central control module calculates a first breakout score D1, a second breakout score D2, a … nth breakout score DN according to the method for calculating the breakout score D, and the central control module calculates a total breakout score Dz, Dz being D1+ D2+ … + DN;
the central control module compares the total oral collapse score Dz with the oral collapse score parameter Dp,
when Dz is less than or equal to Dp, the central control module judges that the cutting of the edge of the panel is qualified;
and when Dz is larger than Dp, the central control module judges that the panel edge is unqualified in cutting.
7. The method for detecting the cut of the LCD panel as claimed in claim 6, wherein the central control module has a first predetermined number of breakouts evaluation parameter M1, a second predetermined number of breakouts evaluation parameter M2, a first predetermined value of the breakouts score Dp1, a second predetermined value of the breakouts score Dp2, and a third predetermined value of the breakouts score Dp3, wherein M1 < M2, Dp1 > Dp2 > Dp 3;
when only 1 metrorrhagia exists in the panel edge image A, the central control module selects a first preset metrorrhagia score parameter value Dp1 as a metrorrhagia score parameter Dp;
when N breakouts exist in the panel edge image A, the central control module compares the number N of the breakouts with a first preset number evaluation parameter M1 and a second preset number evaluation parameter M2,
when N is less than or equal to M1, the central control module selects a first preset breakout score parameter value Dp1 as a breakout score parameter Dp;
when the M1 is more than or equal to M2, the central control module selects a second preset breakout score parameter value Dp2 as a breakout score parameter Dp;
and when N is larger than M2, the central control module selects a third preset breakout score parameter value Dp3 as the breakout score parameter Dp.
8. The method as claimed in claim 7, wherein in step S2, the central control module determines RGB values (X1, Y1, Z1) of the panel under a standard green light signal, the central control module has a standard green light value (0, 255,0) set therein, the central control module calculates a green light deviation value W1, W1 ═ X1 × g1+ (255-Y1) × g2+ Z1 × g3 according to (X1, Y1, Z1), wherein g1 is a green light deviation value first preset calculation compensation parameter, g2 is a green light deviation value second preset calculation compensation parameter, and g3 is a green light deviation value third preset calculation compensation parameter;
the central control module determines RGB values (X2, Y2 and Z2) of the panel under a standard red light signal, standard red light values (255,0 and 0) are arranged in the central control module, the central control module calculates a red light deviation value W2 according to (X2, Y2 and Z2), W2 is (255-X2) X r1+ Y2X r2+ Z2X r3, wherein r1 is a first preset calculation compensation parameter of the red light deviation value, r2 is a second preset calculation compensation parameter of the red light deviation value, and r3 is a third preset calculation compensation parameter of the red light deviation value;
the central control module determines RGB values (X3, Y3 and Z3) of the panel under a standard blue light signal, standard blue light values (0,0 and 255) are arranged in the central control module, and the central control module calculates a blue light deviation value W3 according to (X3, Y3 and Z3), wherein the W3 is X3 × u1+ Y3 × u2+ (255-Z3) × u3, u1 is a first preset calculation compensation parameter of the blue light, u2 is a second preset calculation compensation parameter of the blue light deviation value, and u3 is a third preset calculation compensation parameter of the blue light deviation value;
the central control module calculates RGB color scores E according to green light deviation values W1, red light deviation values W2 and blue light deviation values W3, wherein E is W1 xq 1+ W2 xq 2+ W3 xq 3, q1 is a compensation parameter calculated by green light deviation values on color scores, q2 is a compensation parameter calculated by red light deviation values on color scores, and q3 is a compensation parameter calculated by blue light deviation values on color scores;
the inside of the central control module is provided with an RGB color scoring standard value Ez, the central control module compares the RGB color scoring E with the RGB color scoring standard value Ez,
when E is less than or equal to Ez, the central control module judges that the electrical color detection of the display panel is qualified;
and when E is larger than Ez, the central control module judges that the electric color detection of the display panel is unqualified.
9. The method as claimed in claim 8, wherein a first predetermined panel score Q1 and a second predetermined panel score Q2 are provided in the central control module, the central control module calculates a panel score Q according to the total score Dz and RGB color score E, Q is Dz x p1+ E x p2, wherein p1 calculates compensation parameters for the panel score based on the total score Dz, p2 calculates compensation parameters for the panel score based on the RGB color score, the central control module compares the panel score Q with the first predetermined panel score Q1 and the second predetermined panel score Q2,
when Q is not more than Q1, the central control module judges the quality of the display panel to be excellent;
when Q is more than Q1 and less than or equal to Q2, the central control module judges that the quality of the display panel is good;
when Q is larger than Q2, the central control module judges the quality of the display panel to be qualified.
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