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WO2004088399A1 - Appareil d'inspection de contours de cellules de dispositif d'affichage a cristaux liquides et son procede de mise en oeuvre - Google Patents

Appareil d'inspection de contours de cellules de dispositif d'affichage a cristaux liquides et son procede de mise en oeuvre Download PDF

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Publication number
WO2004088399A1
WO2004088399A1 PCT/KR2004/000748 KR2004000748W WO2004088399A1 WO 2004088399 A1 WO2004088399 A1 WO 2004088399A1 KR 2004000748 W KR2004000748 W KR 2004000748W WO 2004088399 A1 WO2004088399 A1 WO 2004088399A1
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WO
WIPO (PCT)
Prior art keywords
lcd cell
edge
signal
align
vision controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2004/000748
Other languages
English (en)
Inventor
Sun Yeol Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HITS CO Ltd
Original Assignee
HITS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020030020296A external-priority patent/KR100418356B1/ko
Priority claimed from KR1020030020297A external-priority patent/KR100418357B1/ko
Application filed by HITS CO Ltd filed Critical HITS CO Ltd
Publication of WO2004088399A1 publication Critical patent/WO2004088399A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G01N21/956—Inspecting patterns on the surface of objects
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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

Definitions

  • the present invention relates to an LCD (liquid crystal display) panel
  • a TFT (thin film transistor) substrate and a color filter substrate are manufactured, they are combined
  • respective unit panels represent LCD cells.
  • the grinding process is executed on
  • ground edges are inspected when the four edges of the LCD cell are ground.
  • the above-described method has a demerit for an operator
  • FIG. 1 shows a flowchart for inspecting edges of an LCD cell
  • FIG. 2 shows a device for inspecting edges of an LCD cell according
  • FIGs. 3 to 5 show a perspective view of the LCD cell shown in FIG.
  • FIG. 6 shows a magnified plane view of the LCD cell shown in FIG.
  • FIG. 7 shows a device for inspecting edges of an LCD cell according to a second preferred embodiment of the present invention.
  • FIGs. 8 to 1 1 show a side view and a plane view of the LCD cell according to a second preferred embodiment of the present invention
  • FIG. 12 shows a modified device for inspecting edges of an LCD cell according to a second preferred embodiment of the present invention.
  • FIG. 13 shows a flowchart for inspecting edges of an LCD cell
  • a method for inspecting an edge of an LCD cell by using a line scan camera comprises: inputting a predetermined reference value for determining a defect state of the LCD cell to a vision controller, and establishing an initial position of the line scan camera; allowing the vision controller to generate an align control signal and transmit it to a PLC controller, and allowing the PLC controller to drive an inspection table according to the transmitted align control signal and align the LCD cell moved to the inspection table, when the reference value is input to the vision controller and the initial position of the line scan camera is established; allowing the vision controller to use an align mark formed on the LCD cell and determine whether the alignment is correct, when the LCD cell moved to the inspection table is aligned; allowing the vision controller to drive the line scan camera, photograph the edge of the LCD cell, and obtain an edge image, when the LCD cell is correctly aligned; allowing the vision controller to use the obtained edge image, inspect whether a case in which a difference between an actual distance value of from the edge of the LCD cell to a reference line and the
  • a device for inspecting an edge of an LCD cell comprises: a camera illumination generator for receiving a camera illumination control signal and generating a camera illumination driving signal for driving the illumination used for photographing the LCD cell; a bottom illumination generator for receiving a bottom illumination control signal to generate a bottom illumination driving signal for generating the illumination used for photographing the edge of the LCD cell, and generating the illumination through a measuring illuminator; a first camera for receiving the camera illumination driving signal, a first photographing signal, and a second photographing signal respectively, photographing the align mark formed on the LCD cell when the first photographing signal is received, and photographing the edge of the LCD cell, generating a first align mark image signal and an edge image signal, and outputting them when the second photographing signal is received; a second camera for receiving the camera illumination driving signal and first photographing signal respectively, photographing the align marks formed on the LCD cell, generating a second align mark image signal, and outputting it when the second photographing signal is received; a second camera for receiving the camera illumination driving signal and first photographing signal respectively
  • a method for inspecting an edge of an LCD cell comprises: establishing initial positions of a first camera and a second camera, and allowing a vision controller to receive information on the LCD cell from a PLC controller; determining whether a measure signal for measuring the LCD cell is provided to the vision controller from the PLC controller in a measuring standby state when the information on the LCD cell is input to the vision controller; allowing the vision controller to transmit a signal for moving the LCD cell to the PLC controller in order to move the ground LCD cell to an inspection table when the measure signal is provided to the vision controller; photographing an edge of the LCD cell to calculate a ground amount, and transmitting the calculated ground amount to the PLC controller or transmitting the photographed edge image signal to a display of the vision controller when the signal for moving the LCD cell is transmitted and the LCD cell is moved to the inspection table; allowing the vision controller to determine whether a predetermined number of predefined test points are measured when the edge image signal of
  • FIG. 1 shows a flowchart of a method for inspecting edges of an LCD cell according to a first preferred embodiment of the present invention
  • FIG. 2 shows a device for inspecting edges of an LCD cell according to a first preferred embodiment of the present invention.
  • the method for inspecting edges of an LCD cell comprises: inputting a predetermined reference value for determining whether defects are generated on the edges of the LCD cell 10 to a vision controller 70, and establishing an initial position of a line scan camera 40 in step S10; allowing the vision controller 70 to generate an align control signal and transmit it to a PLC (programmable logic controller) controller 60, and allowing the PLC controller 60 to drive an inspection table 61 according to the transmitted align control signal and align the LCD cell 10 moved to the inspection table 61 in step S20 when the predetermined reference value is input to the vision controller 70 and the initial position of the line scan camera 40 is established; allowing the vision controller 70 to determine whether the alignment is correct by using an align mark 11d formed on the LCD cell 10 in step S30 when the LCD cell 10 moved to the inspection table 61 is aligned; allowing the vision controller 70 to drive the line scan camera 40 to photograph edges of the LCD cell 10 and obtain an edge image in step S40 when the LCD cell 10 is correctly aligned; allowing the vision
  • the device for inspecting the edges of the LCD cell comprises a bottom illuminator 20, a first bottom illuminator 30, a line scan camera 40, a first line scan camera 50, a PLC controller 60, and a vision controller 70.
  • the bottom illuminator 20 and the first bottom illuminator 30 are provided to respectively face the line scan camera 40 and the first line scan camera 50, and they generate light when photographing the edges of the LCD cell 10 installed in the inspection table 61 with the line scan camera 40 and the first line scan camera 50.
  • the PLC controller 60 shifts or rotates the LCD cell 10 installed in the inspection table 61 in the directions of the X axis, the Y axis, and the rotation axis of the inspection table 61 in order to arrange the LCD cell 10.
  • the configuration of the inspection table 61 is briefly described since a general table which can be driven in the directions of the X axis, the Y axis, and the rotation axis is generally known.
  • the vision controller 70 for transmitting and receiving information to/from the PLC controller 60 which drives the inspection table 60, and for controlling the bottom illuminator 20, the first bottom illuminator 30, the line scan camera 40, and the first line scan camera 50 comprises a PC (personal computer) 71 , an I/O (input/output) unit 72, a grabber 73, a display 74, and a keyboard 75.
  • the grabber 73 obtains the edge images from the first and second line scan cameras 40 and 50 respectively, and transmits them to the PC 71.
  • the I/O unit 72 manages inputs and outputs.
  • the keyboard 75 is used for the operator to input information and initial setting values to the vision controller 70.
  • the display 74 displays obtained results of the edge images and other results to the operator.
  • the edge image displayed on the display 74 of the vision controller 70 is generated by photographing the edges of the LCD cell 10.
  • the TFT substrate 11 and the color filter substrate 12 are manufactured as shown in FIG. 3, they are adhered to face with each other as shown in FIG. 4, and they are separated into the LCD cells 10 through the scribing and breaking process as shown in FIG. 5.
  • the edge inspection method for inspecting the defect phenomenon generated on the edges of the separated LCD cells 10 uses one bottom illuminator 20 and one line scan camera 40, differing from the inspection device shown in FIG. 2. Noting this point, as shown in FIGs. 1 and 2, the edge inspection method according to the first preferred embodiment inputs a predetermined reference value for determining whether the edge of the LCD cell 10 has a defect, to the vision controller 70, and establishes the initial position of the line scan camera 40 in step S10.
  • the vision controller 70 When the predetermined reference value is input to the vision controller 70, and the initial position of the line scan camera 40 is established, the vision controller 70 generates an align control signal, and transmits it to the PLC controller 60, and the PLC controller 60 drives an inspection table 61 according to the transmitted align control signal to align the moved LCD cells 10 in step S20.
  • the vision controller 70 uses the align mark 11d formed on the LCD cells 10 to determine whether they are correctly aligned in step S30.
  • the vision controller 70 photographs the image of the cross-type align mark 11d, checks whether the photographed image corresponds to the normal align mark 11d to calculate a compensated amount according to a rotated amount of the inspection table 61 , and uses an extended central line 11 b which is passed through a plurality of align marks 11d to calculate a compensated amount for moving in the directions of the X axis and the Y axis of the inspection table 61.
  • the compensated amount is transmitted to the PLC controller
  • the PLC controller 60 drives the inspection table 61 according to the
  • the vision controller 70 photographs one align mark 11d, moves along a straight line, photographs another facing align mark 11d, and aligns them
  • the first line scan camera 50 are provided, they are fixed on the straight line,
  • the vision controller 70 obtains a plurality of align marks 1 1d and aligns
  • the vision controller 70 drives the line scan camera 40 to photograph the edge of the LCD cell 10 to obtain an edge image in step S40.
  • the vision controller 70 drives the bottom illuminator 20 to generate illumination light, and drives the line scan camera to photograph the edge of the LCD cell 10. In this instance, the photographing speed on the edge of the LCD cell 10 can be improved in the
  • the vision controller 70 uses a reference value to determine whether a defect has occurred in the obtained edge image in step S50.
  • the vision controller 70 uses the edge image to calculate the edge image.
  • step S51 In order
  • the vision controller 70 uses the obtained edge image to inspect whether a case in which a difference between the actual distance value p of from the edge of the LCD cell 10 to a reference line and the reference value m is greater than a predetermined first distance value has been generated. When it is found that "(p-m) > first
  • the damaged pattern phenomenon d has been generated on the pattern of the LCD cell 10. That is, it is determined that the pattern damage d has been generated when an error allowance range is established to be the first distance value and damage which exceeds the error allowance range is generated.
  • the vision controller 70 uses the edge image to determine whether burrs ("a" and "b” in FIG. 6) have been generated on the edges of the LCD cell 10 in step S52.
  • the burr "a" represents
  • the vision controller 70 uses the obtained edge image to inspect whether a case that a difference between the actual distance values n and k of from the edge of the LCD cell 10 to the reference line and the reference value m is greater than a predetermined second distance value has been generated. When it is found that "
  • burrs "a” and "b” have been generated when an error allowance range is established to be the second distance value and damage which exceeds the error allowance range is generated.
  • the reference value m for determining the defect state of the pattern damage d and the burrs "a" and "b” in the previous steps S51 and S52 is calculated by using the distance m to the edge of the normal LCD cell 20, that is, the distance between the extended central line 11b of the two align marks 11d formed on the LCD cell 10 and the reference line 11c which is provided in parallel with the extended central line 11b and at a predetermined distance from the edge of the LCD cell 10.
  • the vision controller 70 determines it to be pattern damage d, and when a difference between the distances n and k and the reference value m is greater than a predetermined second distance value, the vision controller 70 determines that the burrs "a" and "b" have been generated.
  • the vision controller 70 uses the edge image to check whether a breakage phenomenon (the reference numeral c shown in FIG. 6) is generated on the edge of the LCD cell 10 and whether a predetermined brightness value is greater than a reference value, and thereby determine whether the breakage phenomenon c has been generated in step S53.
  • a breakage phenomenon the reference numeral c shown in FIG. 6
  • the brightness reference value for determining the defect state of the breakage phenomenon c is established by using the brightness of the normal edge image obtained by using the line scan camera 40, and the vision controller 70 determines that the breakage phenomenon c has been generated on the edge of the LCD cell 10 when the difference between the established brightness reference value and the measured edge image is greater than a predetermined brightness value.
  • the vision controller 70 When no defect is shown to be generated on the edge image of the LCD cell 10 through the above-described process, the vision controller 70 generates goodness information of the edge of the LCD cell 10 and outputs it in step S60, and when a defect is shown to be generated on the edge image, the vision controller 70 generates badness information of the edge of the LCD cell 10 and outputs it in step S70. That is, the vision controller 70 displays goodness information and badness information to the display 74 or transmits the same to the PLC controller 60 in the respective cases to be ready for the subsequent inspection process.
  • All the defects which can be generated on the edges can be easily inspected by establishing a predetermined reference line on the edge of the LCD cell, using a line scan camera to sequentially photograph the edge, and processing them as images as described above.
  • FIGs. 7 to 13 a device for inspecting edges of an LCD panel according to a second preferred embodiment of the present invention will be described.
  • FIG. 7 shows a device for inspecting edges of an LCD cell according to a second preferred embodiment of the present invention
  • FIGs. 8 to 11 show a side view and a plane view of the LCD cell according to a second preferred embodiment of the present invention.
  • the device for inspecting edges of an LCD cell comprises a PLC controller 110, a camera illumination generator 120, a bottom illumination generator 130, a first camera CAM1 , a second camera CAM2, and a vision controller 150.
  • the camera illumination generator 120 receives a camera illumination control signal and generates a camera illumination driving signal for driving illumination for photographing the LCD cell.
  • the bottom illumination generator 130 receives a bottom illumination control signal, generates a bottom illumination driving signal for generating illumination for photographing the edge of the LCD cell 160, and generates the illumination through a bottom illuminator 131.
  • the LCD cell 160 includes a TFT substrate 161 and a color filter substrate 162 as shown in FIG. 9.
  • the first camera CAM1 receives the camera illumination driving signal output by the camera illumination generator 120, generates illumination according to the camera illumination driving signal, and when receiving a first photographing signal according to the photographing signal and a second photographing signal respectively output by the vision controller 150, the first camera CAM1 photographs an align mark (shown as A in FIG. 8) formed on the LCD cell 160, photographs the edge of the LCD cell 160 when receiving the second photographing signal, generates a first align mark image signal and an edge image signal, and outputs them.
  • an align mark shown as A in FIG. 8
  • the first camera CAM1 photographs an align mark A for aligning the LCE cell 160
  • the second camera CAM2 concurrently photographs an align mark A.
  • the second camera CAM2 photographs an align mark A which faces the align mark A photographed by the first camera CAM1 on the straight line as shown in FIG. 8.
  • the second camera CAM2 receives the camera illumination control signal from the camera illumination generator 120, generates illumination according to the received camera illumination control signal, receives the first photographing signal from the vision controller 150, photographs the align mark A formed on the LCD cell, generates a second align mark image signal, and outputs it.
  • the first and second cameras CAM1 and CAM2 photograph two align marks A which face with each other on the straight line.
  • the first camera CAM1 photographs the align mark A provided on the top right of the drawing
  • the second camera CAM2 photographs the align mark A provided on the top left thereof
  • the LCD cell 160 is aligned through the vision controller 150.
  • the vision controller 150 receives a measure signal from the PLC controller 110, generates a camera illumination control signal, a bottom illumination control signal, a first photographing signal, and a second photographing signal for photographing the LCD cell 160 at intervals of a predetermined time, and outputs them.
  • the intervals of predetermined times represent the time intervals for moving the LCD cell 160 according to photographing times of predefined test points.
  • the vision controller 150 When the vision controller 150 generates the camera illumination control signal, the bottom illumination control signal, the first photographing signal, and the second photographing signal, and receives the first and second align mark image signals and the edge image signal from the first and second cameras CAM1 and CAM2, the vision controller 150 controls an inspection table 140 through the PLC controller 110 in order to modify the aligned states of the LCD cell 160 according to the received first and second align mark image signals, and photographs a predetermined number of test points.
  • the inspection table 140 is moved on the X axis and the Y axis and is rotated on the ⁇ axis (the X axis, the Y axis, and the ⁇ axis are not illustrated), and no detailed configuration of the inspection table 140 is described.
  • the vision controller 150 comprises a PC (personal computer) 151 , an I/O (input/output) unit 152, a grabber 153, a display 154, and a keyboard 155.
  • the grabber 153 captures images, and the keyboard 155 is used to allow the operator to input desired information to the PC 151.
  • the vision controller 150 uses the align mark A registered during the measurement preparation process and the first and second align mark image signals photographed by the two first and second cameras CAM1 and CAM2, and modifies the aligned states of the LCD cell 160, or accurately calculates a rotation angle and distances of the X axis and the Y axis to be rotated and moved and transmits the calculated data to the PLC controller 110 in order for the first camera CAM1 to photograph the edge of the LCD cell 160 depending on the number of the test points.
  • the PLC controller 110 rotates and moves the inspection table 140 according to the transmitted rotation angle, and the distances of the X axis and the Y axis to be moved.
  • FIG. 11 shows the edge of the LCD cell 160, and the first camera CAM1 photographs the edge of the TFT substrate 161 of the LCD cell 160 according to control by the vision controller 150.
  • the bottom illumination generator 130 controls the brightness of the edge illuminator 131 through the vision controller 150.
  • the edge image signal shown in FIG. 11 is generated by the first camera CAiWil .
  • a plurality of patterns 161a and tab pads 161b are formed on the edge image signal shown in FIG. 11 , and they are established to be adjacent to the web pad 161b as indicated by a dotted region B when establishing a test point.
  • FIG. 12 shows another configuration of a device for inspecting the edge of the LCD cell 160.
  • the device further comprises a third camera CAM3 for photographing the ground edge of the LCD panel 160.
  • the third camera CAM3 comprises a lens 171 , a first half mirror 172, a photographer 173, and a second half mirror 174.
  • the third camera CAM3 photographs the bottom edge of the TFT substrate 161 according to the second photographing signal output by the vision controller 150, and allows the first camera CAM1 to photograph the top edge.
  • the initial positions of the first and second cameras CAM1 and CAM2 are established, and information on the LCD cell 160 is provided to the vision controller 150 from the PLC controller 110 in step S110.
  • the initial positions distances between the align marks (A shown in FIG. 8) formed on the LCD cell 160 and information on the actual measured distances of the align marks A are respectively input, initial positions of the first and second cameras CAM1 and CAM2 are established, the pixel distance displayed on the display 154 is calculated, and the distances "m” and "n” shown in FIGs. 10 and 11 for indicating ground amounts are calculated.
  • the distance of the pixels of the display 154 of the vision controller 150 is calculated in order to calculate the distances "m” and "n” shown in FIGs. 10 and 11.
  • the align marks A formed on the LCD cell 160 are magnified by a predetermined multiple, a length thereof in one direction is measured, the align marks A are displayed on the display 154 of the vision controller 150 with the same size as that of the measured align mark, the number of pixels in the same direction of the measured align marks A of the displayed align marks is determined, and the pixel distance is found by dividing the length of the measured align marks A by the number of pixels.
  • the distances "m” and "n” shown in FIGs. 10 and 11 are calculated by using the pixel distance.
  • the PLC controller 110 drives a grinder (not illustrated) in the process for manufacturing the LCD cell 160, and controls a device (not illustrated) for moving the LCD cell 160 to the inspection table 140 from the grinder, and accordingly, the PLC controller 110 notifies the vision controller 150 of a fact that the ground LCD cell 160 has been moved to the inspection table 140 by transmitting the measure signal to the vision controller 150.
  • a signal for moving the LCD cell is transmitted to the PLC controller 110 in step S130 in order to move the ground LCD cell 160 to the inspection table 140.
  • the LCD cell 160 is moved thereto by using a device (not illustrated) for moving the LCD cell 160 to the inspection table 140 from the grinder (not illustrated) according to control by the PLC controller 110.
  • the edge of the LCD cell 160 is photographed to calculate a ground amount, and the calculated ground amount is transmitted to the PLC controller 110 or the photographed edge image signal is transmitted to the display 154 of the vision controller 150 in step S140.
  • the grinding task is more accurately performed by automatically measuring the ground amount of the LCD cell 160 and automatically comparing grinding process conditions with the ground amount while the grinding process conditions are previously input to the vision device 110.
  • the vision controller 150 determines whether the number of the predefined test points has been measured in step S150. When having determined that the number of the predefined test points has been measured, the vision controller 150 determines whether to consecutively measure the edge of the subsequent LCD cell 160 in step S160. When the measure signal is not received in the previous step S120 for the vision controller 150 to determine whether the measure signal has been received from the PLC controller 110 in order to automatically measure the ground amount to accurately inspect the ground state of the LCD cell 160 and improve the speed of inspecting the tasks, the vision controller 150 determines whether an align signal is received from the PLC controller 110 in step S190.
  • the vision controller 150 uses the first and second cameras CAM1 and CAM2 to detect the align marks A formed on the edge of the LCD cell 160 in step S200.
  • step S210 When the vision controller 150 determines whether the align mark A corresponds to a predetermined reference align line and finds that they do not correspond to each other in the previous step S200 for detecting the align mark formed on the edge of the LCD cell 160, an error signal is generated in step S210. That is, it is determined whether the align marks A formed on the LCD cell 160 correspond to the reference align line previously stored in the vision controller 150 and displayed on the display 154. When no error is generated in the previous step S210 for determining whether the align marks correspond to the reference align line and generating an error signal, the vision controller 150 calculates an align modified amount for modifying the align error of the LCD cell 160 and transmits it to the PLC controller 110 in step S220. In this instance, the vision controller 150 uses the align marks (A shown in FIG.
  • the PLC controller 110 uses the transmitted align modified amount to drive the inspection table 140 and automatically align the LCD cell 160 in the rotation directions of the X axis, the Y axis, and the ⁇ axis.
  • the vision controller 150 calculates the grind modified amount for modifying the edge grinding amount of the LCD cell 160, transmits it to the PLC controller 110, and performs a measuring standby state in step S180 to inspect the edge of the ground LCD cell 160.
  • the measuring standby state represents a state for the vision controller 150 to check whether a measure signal has been generated and an align signal has been generated by the PLC controller 110.
  • the inspection task speed can be improved by automatically measuring the ground amount to further accurately inspect the defect state of grinding and aligning the LCD cell moved to the inspection table automatically in the directions of the X axis, the Y axis, and the ⁇ axis.

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Abstract

La présente invention a trait à un procédé permettant l'inspection d'un contour d'une cellule de dispositif d'affichage à cristaux liquides au moyen d'une caméra de balayage de lignes comprenant : la saisie d'une valeur de référence pour déterminer si des défauts sont générés sur le contour de la cellule de dispositif d'affichage à cristaux liquides vers un contrôleur de visionnement, et l'établissement d'une position initiale de la caméra de balayage de lignes ; la génération d'un signal de commande d'alignement, et sa transmission à un contrôleur logique programmable, la commande d'une table d'inspection pour l'alignement du signal de commande et l'alignement de la cellule de dispositif d'affichage à cristaux liquides déplacée vers la table d'inspection ; la détermination d'un alignement correct au moyen d'un repère d'alignement formé sur la cellule de dispositif d'affichage à cristaux liquides ; la commande de la caméra de balayage de lignes pour une prise de vue des contours de la cellule de dispositif d'affichage à cristaux liquides, et l'obtention d'une image de contour ; la détermination de la génération d'un défaut sur le contour obtenu à l'aide de la valeur de référence ; et la génération d'une information de correction sur les contours de la cellule de dispositif d'affichage à cristaux liquides et la sortie de l'information de correction.
PCT/KR2004/000748 2003-03-31 2004-03-31 Appareil d'inspection de contours de cellules de dispositif d'affichage a cristaux liquides et son procede de mise en oeuvre Ceased WO2004088399A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0020297 2003-03-31
KR1020030020296A KR100418356B1 (ko) 2003-03-31 2003-03-31 라인스캔 카메라를 이용한 엘시디(lcd) 패널의 에지면검사방법
KR10-2003-0020296 2003-03-31
KR1020030020297A KR100418357B1 (ko) 2003-03-31 2003-03-31 엘시디(lcd) 패널의 측면검사장치 및 방법

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WO2004088399A1 true WO2004088399A1 (fr) 2004-10-14

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106200038A (zh) * 2016-07-13 2016-12-07 芜湖东旭光电科技有限公司 一种玻璃基板的边部检测系统及其检测方法
CN107238955A (zh) * 2017-06-30 2017-10-10 北京兆维科技开发有限公司 液晶模组屏检测系统
WO2019064622A1 (fr) * 2017-09-28 2019-04-04 日東電工株式会社 Procédé d'inspection de dommages d'un panneau d'affichage optique
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CN106200038B (zh) * 2016-07-13 2019-07-30 芜湖东旭光电科技有限公司 一种玻璃基板的边部检测系统及其检测方法
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CN107238955B (zh) * 2017-06-30 2023-12-29 北京兆维科技开发有限公司 液晶模组屏检测系统
WO2019064622A1 (fr) * 2017-09-28 2019-04-04 日東電工株式会社 Procédé d'inspection de dommages d'un panneau d'affichage optique
JP2019060823A (ja) * 2017-09-28 2019-04-18 日東電工株式会社 光学表示パネルの損傷検査方法
CN111581683A (zh) * 2020-04-27 2020-08-25 深圳市华星光电半导体显示技术有限公司 显示面板信息提取方法、装置及电子设备
US11880910B2 (en) 2020-04-27 2024-01-23 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Method for extracting information from a display panel, device, and electronic device

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