WO2012108262A1 - 表示パネルの検査装置および表示パネルの検査方法 - Google Patents
表示パネルの検査装置および表示パネルの検査方法 Download PDFInfo
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- WO2012108262A1 WO2012108262A1 PCT/JP2012/051532 JP2012051532W WO2012108262A1 WO 2012108262 A1 WO2012108262 A1 WO 2012108262A1 JP 2012051532 W JP2012051532 W JP 2012051532W WO 2012108262 A1 WO2012108262 A1 WO 2012108262A1
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- display panel
- inspection
- probe
- terminal portion
- panel
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- 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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
Definitions
- the present invention relates to a display panel inspection apparatus and a display panel inspection method, and more particularly, to a display panel inspection apparatus and a display panel inspection method that contribute to the discovery of defects (defects) caused by foreign matters.
- a lighting inspection is performed in which an inspection signal is input to the display panel to detect the presence or absence of defects (see, for example, Patent Document 1).
- an inspection signal is input to the display panel to detect the presence or absence of defects
- foreign matters are mixed between substrates (in the liquid crystal layer in a liquid crystal display device), and electrical elements (for example, source signal lines) on one substrate (thin film transistor array substrate) side and the other substrate (color filter substrate). )
- a malfunction (lighting failure) or the like caused by a short circuit with an electrical element for example, a common electrode
- a short circuit due to the foreign substance F may occur for the first time after becoming a “display device” (a defect (such as a lighting failure) due to the foreign substance F becomes apparent at the inspection stage of the “display device”).
- a defect such as a lighting failure
- the problem to be solved by the present invention is to inspect a display panel that can surely find a defect caused by the inclusion of a foreign substance that becomes apparent for the first time as a display device at the stage of the display panel.
- An object of the present invention is to provide an inspection method for an apparatus and a display panel.
- a display panel inspection apparatus is provided along a panel pressing means for pressing a predetermined portion in an area outside an image display area of the display panel, and along a side edge of the display panel.
- the gist of the invention is to include probe driving means for bringing a test probe into contact with a terminal portion electrically connected to the signal wiring of the display panel.
- the panel pressing means may be configured to be capable of selectively pressing a plurality of predetermined portions in an area outside the image display area of the display panel.
- the panel pressing means has a total of eight places so as to be vertically and horizontally symmetrical about a center line that bisects the display panel, two places in each outer region along each side edge of the display panel. It is good to be comprised so that the predetermined part provided in can be selectively pressed.
- the probe driving means is measured by the actuator that moves the probe forward and backward with respect to the terminal portion, a pressure sensor that measures the force that the probe that contacts the terminal portion receives from the terminal portion, and the pressure sensor. And a control unit that adjusts the power of the actuator so that the force received by the probe from the terminal portion is within a predetermined range.
- the actuator is an air cylinder
- the control means controls the air pressure supplied to the air cylinder so as to adjust the force received from the terminal portion within a predetermined range.
- the probe driving means may have a moving unit that moves the probe in the plane direction of the display panel.
- a display panel inspection method includes a panel deformation procedure for elastically deforming a display panel into one or a plurality of predetermined shapes, and the display panel according to the panel deformation procedure.
- An inspection probe is brought into contact with a terminal portion electrically connected to the signal wiring of the display panel provided along the side edge of the display panel in a state where the display panel is deformed into a predetermined shape.
- a defect determination procedure for determining whether or not there is a defect in the display area.
- the panel deformation procedure includes a first procedure for simultaneously pressing the predetermined portions of a total of four locations provided on each of the upper and lower sides of the display panel to deform the display panel in the left-right direction.
- the second step of simultaneously pressing the predetermined portion of the four places provided on each of the left and right sides of the display panel to deform the display panel in the vertical direction, and the upper left corner of the display panel Simultaneously press the two predetermined portions located so as to sandwich and the two predetermined portions located so as to sandwich the lower right corner, and deform the display panel in a diagonal direction extending from the upper right corner to the lower left corner.
- a fourth step of deforming the panel in a diagonal direction extending from the upper left corner to the lower right corner, and the defect determination procedure is performed in a state where the display panel is deformed into a predetermined shape by each of the steps. Good.
- the display panel inspection apparatus includes a panel pressing unit that presses a predetermined portion in an area outside the image display area, so that the panel is elastically deformed (bent to a predetermined shape).
- the probe for inspection can be brought into contact (lighting inspection is performed). Therefore, it is possible to find defects in the state of the display panel, such as defects caused by the inclusion of foreign matter, which have become apparent for the first time as a display device in which a slight distortion has conventionally occurred. As a result, the reliability of the inspection is improved and the manufacturing cost (inspection cost) of the display device is reduced.
- the panel pressing means is configured to be able to selectively press a predetermined portion of a plurality of locations on the display panel, the display panel can be elastically deformed into various shapes. It is reliably detected. That is, the reliability of inspection is further improved.
- the panel pressing means is configured to be able to selectively press a total of eight predetermined portions provided to be vertically and horizontally symmetrical about a center line that bisects the display panel, the display panel The probe for inspection can be contacted in a state in which it is elastically deformed in the vertical direction, the horizontal direction, and the two diagonal directions.
- the display panel (terminal portion) and each probe can be changed depending on the deformation state (deformation amount, etc.) of the display panel.
- the force received by the probe from the terminal portion by the pressure sensor is within a predetermined range (the probe is not likely to be damaged, and a good electrical contact state between the probe and the terminal portion is obtained. Therefore, it is possible to prevent the occurrence of problems caused by inspecting the display panel in an elastically deformed state.
- the actuator is an air cylinder and the air pressure supplied to the air cylinder is controlled so that the force received from the terminal portion is within a predetermined range, the configuration is easy, and the probe Pressure control is also easy.
- the position of the terminal portion in the plane direction of the display panel depends on the deformation state (deformation amount, etc.) of the display panel. It changes slightly.
- a moving unit that moves the probe in the plane direction of the display panel is provided, even if the position of the terminal portion in the plane direction of the display panel changes due to elastic deformation of the display panel, the probe The position of the probe in the plane direction of the display panel can be adjusted so as to contact the approximate center of the terminal portion. That is, the probe and the terminal portion can be reliably brought into electrical contact.
- an inspection probe is brought into contact with the panel in an elastically deformed state (lighting inspection is performed). It is possible to find defects in the display panel, such as defects caused by the contamination of foreign matters that have been apparent for the first time. As a result, the reliability of the inspection is improved and the manufacturing cost (inspection cost) of the display device is reduced.
- the defect determination procedure may be performed for each display panel that has been elastically deformed into a predetermined shape by the first to fourth procedures.
- the display panel is deformed in the left-right direction in order to simultaneously press a predetermined portion of a total of four places provided on each of the upper and lower sides of the display panel.
- the display panel is deformed in the vertical direction in order to simultaneously press four predetermined portions provided at two positions on the left and right sides of the display panel.
- the third procedure is to simultaneously press the two predetermined portions located so as to sandwich the upper left corner of the display panel and the two predetermined portions located so as to sandwich the lower right corner. Deforms along a diagonal extending from the corner to the lower left corner.
- the fourth procedure is to simultaneously press the two predetermined portions located so as to sandwich the upper right corner of the display panel and the two predetermined portions located so as to sandwich the lower left corner. Deforms along a diagonal extending from the corner to the lower right corner. Since inspection is performed by bringing the inspection probe into contact with each of these deformed states, the reliability of the inspection is improved.
- FIG. 1 is a schematic view (viewed from above) of an inspection apparatus according to an embodiment of the present invention. It is a figure for demonstrating the panel press means with which the inspection apparatus shown in FIG. 1 is provided, and is the sectional view on the AA line in FIG. 1 (hatching is abbreviate
- FIG. 2 is a view for explaining probe driving means provided in the inspection apparatus shown in FIG. 1, and is a cross-sectional view taken along the line BB in FIG. 1 (hatching is omitted).
- FIG. 4 is a conceptual diagram for explaining the function of the probe driving means provided in the inspection apparatus shown in FIG. 1, and FIG. 4A shows that the inspection terminal portion has moved downward (lower direction) due to elastic deformation of the liquid crystal display panel.
- FIG. 2 is a view for explaining probe driving means provided in the inspection apparatus shown in FIG. 1, and is a cross-sectional view taken along the line BB in FIG. 1 (hatching is omitted).
- FIG. 4 is a conceptual diagram for explaining the
- FIG. 4B shows a case where the inspection terminal portion moves upward (in the high direction) due to elastic deformation of the liquid crystal display panel.
- FIG. 5A is a view schematically showing an outline of the liquid crystal display panel elastically deformed by the first procedure, and FIG. 5B shows a predetermined portion of the liquid crystal display panel pressed in the first procedure. It is a figure.
- FIG. 6A is a view schematically showing an outline of the liquid crystal display panel elastically deformed by the second procedure, and FIG. 6B shows a predetermined portion of the liquid crystal display panel pressed in the second procedure. It is a figure.
- FIG. 7A is a diagram schematically showing an outline of the liquid crystal display panel elastically deformed by the third procedure, and FIG.
- FIG. 7B shows a predetermined portion of the liquid crystal display panel pressed in the third procedure. It is a figure.
- FIG. 8A is a view schematically showing an outline of the liquid crystal display panel elastically deformed by the fourth procedure
- FIG. 8B shows a predetermined portion of the liquid crystal display panel pressed in the fourth procedure. It is a figure.
- FIG. 9A is a schematic diagram for explaining the problems of the conventional configuration
- FIG. 9A is a state before the display panel is incorporated in the frame
- FIG. 9B is a diagram in which the display panel is incorporated in the frame of the display device. It is the figure which showed the state which the electrical element short-circuited by the foreign material.
- the vertical direction in the following description refers to the vertical direction in FIG. 1
- the horizontal direction refers to the horizontal direction in FIG.
- the height direction refers to the height direction of the display panel inspection apparatus 1, and refers to the vertical direction in FIGS. 2, 3, and 8.
- a liquid crystal display panel 90 that is an object to be inspected by a display panel inspection apparatus 1 (hereinafter simply referred to as an inspection apparatus 1) according to an embodiment of the present invention will be briefly described.
- the liquid crystal display panel 90 includes a generally known TFT (thin film transistor) array substrate 91 and a CF (color filter) substrate 92. Liquid crystal is filled between these substrates.
- the TFT array substrate 91 includes a TFT for applying a voltage to the pixel electrode, a scanning signal line (gate signal line) for transmitting a scanning signal to the gate electrode of the TFT, and a data signal for transmitting a data signal to the source electrode.
- a line (source signal line) or the like is formed of a conductor film.
- a region 902 region serving as a frame in the display device outside the image display region 901 (active area) in the TFT array substrate 91, scanning electrically connected to each of wirings drawn from the scanning signal lines.
- a signal line terminal portion and a data signal line terminal portion electrically connected to each of the wiring drawn from each data signal line are provided.
- a scanning signal can be input to each scanning signal line from the scanning signal line terminal section.
- a data signal can be input to each data signal line from the data signal line terminal section.
- an inspection probe 24 (to be described later) is brought into contact with each terminal portion so that an inspection signal can be input. In the following description, these are collectively referred to as an inspection terminal portion 911.
- the inspection apparatus 1 includes a panel pressing unit 10 that presses a predetermined portion of the liquid crystal display panel 90, a probe driving unit 20 that operates an inspection probe used for lighting inspection of the liquid crystal display panel 90, and Control means (not shown) for controlling them.
- the inspection apparatus 1 includes a base 30 on which a liquid crystal display panel 90 that is an object to be inspected is placed.
- the base 30 is a receiving portion 31 in which a region having a constant width along the outer peripheral edge is formed of an elastic body. Specifically, in a state where the liquid crystal display panel 90 is placed at a predetermined position on the base 30, an area 902 (area where a predetermined part described later) is provided in contact with the receiving portion 31. Is set to The inspection apparatus 1 is provided with a positioning member (not shown) so that the liquid crystal display panel 90 is placed at a predetermined position on the base 30.
- the panel pressing means 10 includes a pressing means air cylinder 11 and a pressing member 12 attached to the tip thereof, and the pressing member 12 driven by the pressing means air cylinder 11 is mounted on the base 30 of the apparatus.
- a predetermined portion of the liquid crystal display panel 90 is pressed.
- a predetermined portion in the area 902 outside the image display area 901 (active area) is pressed from the front side (the upper surface of the liquid crystal display panel 90 in the height direction) side of the placed panel.
- the panel pressing means 10 is capable of pressing a total of eight predetermined portions, two positions on each outer region 902 along each side edge of the display panel (a position higher than each predetermined portion). ). That is, the inspection apparatus 1 has a total of eight panel pressing means 10. A plurality of predetermined portions pressed by the panel pressing means 10 are positioned so as to sandwich each corner (four corners) of the liquid crystal display panel 90, and a center line Cx that bisects the liquid crystal display panel 90 in the longitudinal direction, and It is symmetrical in the vertical and horizontal directions with the center line Cy bisecting in the short direction as the axis of symmetry. The plurality of predetermined portions are supported by the receiving portion 31 of the base 30 of the inspection device 1 in the liquid crystal display panel 90 (the respective predetermined portions and the receiving portion 31 are overlapped in the height direction of the inspection device 1). )It is in.
- the control means can independently control a pressure means valve (not shown) that opens and closes the flow path of the compressed air connected to each pressure means air cylinder 11. That is, the control means can selectively operate the plurality of panel pressing means 10. Only one pressing means air cylinder 11 can be operated, or two or more pressing means air cylinders 11 can be operated simultaneously.
- the pressing member 12 attached to the tip of each air cylinder is a part that contacts a predetermined part of the liquid crystal display panel 90.
- the control means opens the pressure means valve, the drive shaft of the pressure means air cylinder 11 advances and the pressure member 12 contacts the liquid crystal display panel 90. Therefore, it is desirable that the pressing member 12 be formed of an elastic body such as rubber.
- the probe driving means 20 includes a probe driving air cylinder 21, a pressure sensor 22, and a moving unit 23.
- An inspection probe 24 is attached to the drive shaft of the probe driving air cylinder 21 via a pressure sensor 22.
- one probe driving air cylinder 21 is provided as an actuator for driving one inspection probe 24.
- the pressure sensor 22 is also provided in each of the plurality of inspection probes 24. That is, one probe driving means 20 is provided for one inspection probe 24.
- the control means can independently control a probe driving valve (not shown) that opens and closes the flow path of the compressed air connected to each probe driving air cylinder 21. That is, the control unit can selectively operate the plurality of probe driving units 20. Only one probe driving air cylinder 21 can be operated, or two or more of the plurality of probe driving air cylinders 21 can be operated simultaneously.
- control means When the control means opens the probe driving valve, the driving shaft of the probe driving air cylinder 21 moves forward, and the inspection probe 24 comes into contact with the inspection terminal portion 911 of the liquid crystal display panel 90.
- the pressure sensor 22 measures the force (stress) received by the inspection probe 24 that contacts the inspection terminal portion 911, and a known sensor can be applied.
- the control means adjusts the power (pressure) of the probe driving air cylinder 21 so that the force falls within a predetermined range. That is, feedback control is performed so that the force received by the inspection probe 24 that contacts the inspection terminal portion 911 falls within a predetermined range.
- the air pressure (air flow rate) supplied to the probe driving air cylinder 21 by the probe driving valve the force received by the inspection probe 24 from the inspection terminal portion 911 is within a predetermined range. Control to be inside.
- the moving unit 23 is configured to move each probe driving air cylinder 21 in the plane direction of the liquid crystal display panel 90. That is, the moving unit 23 also moves the inspection probe 24 and the pressure sensor 22 attached to each probe driving air cylinder 21 in the plane direction of the liquid crystal display panel 90.
- the moving unit 23 includes, for example, a servo motor that moves the probe driving air cylinder 21.
- the panel deformation procedure is performed.
- one or a plurality of panel pressing means 10 are selectively driven by the control means. That is, the drive shaft of the air cylinder 11 for pressing means corresponding to the part (predetermined part) to be deformed of the liquid crystal display panel 90 is advanced. As a result, one or more pressing members 12 provided at the tip of the advanced drive shaft come into contact with a predetermined portion of the liquid crystal display panel 90, and the liquid crystal display panel 90 is elastically deformed into a predetermined shape (to a predetermined shape). Bend).
- a defect determination procedure is performed.
- the drive shaft of the probe driving air cylinder 21 is advanced by the control means.
- the tip of the inspection probe 24 attached to the advanced drive shaft comes into contact with the inspection terminal portion 911 of the liquid crystal display panel 90.
- the control means measures the force received by the inspection probe 24 that comes into contact with the inspection terminal portion 911 by the pressure sensor 22, and the power of the probe driving air cylinder 21 so that the force is within a predetermined range ( Pressure). That is, the air pressure (air flow rate) supplied to the probe driving air cylinder 21 is adjusted by the probe driving valve.
- the reason why the force received by the inspection probe 24 that contacts the inspection terminal portion 911 is adjusted is as follows. As described above, in the inspection apparatus 1, the inspection probe 24 is brought into contact with the inspection terminal portion 911 of the liquid crystal display panel 90 in a state where the liquid crystal display panel 90 is elastically deformed into a predetermined shape. Such elastic deformation of the liquid crystal display panel 90 changes the distance between the inspection probe 24 and the inspection terminal portion 911 at the original position. Therefore, if the air pressure supplied to the probe driving air cylinder 21 is constant, a good electrical contact state between the inspection probe 24 and the probe and the inspection terminal portion 911 cannot be obtained. There is a possibility that the inspection probe 24 may be damaged due to excessive force.
- the air pressure supplied to the probe driving air cylinder 21 is constant, the distance between the inspection probe 24 and the inspection terminal portion 911 is larger than that in the normal state. May not touch.
- the pressure sensor 22 adjusts the force received by the inspection probe 24 that contacts the inspection terminal portion 911 within a certain range, so there is no such a possibility. That is, no matter what shape the liquid crystal display panel 90 is elastically deformed, the inspection probe 24 and the inspection terminal portion 911 can be brought into electrical contact with each other in an electrically good state, and the inspection probe 24 can be There is no risk of damage.
- the probe driving unit 20 included in the inspection apparatus 1 according to the present embodiment has a problem that may occur by performing a lighting inspection while elastically deforming the liquid crystal display panel 90 into a predetermined shape by the panel pressing unit 10. The configuration is prevented.
- the inspection unit 24 is configured to be movable in the plane direction of the liquid crystal display panel 90 by the moving unit 23. If the inspection probe 24 is moved in the plane direction of the liquid crystal display panel 90 in accordance with this, the inspection probe 24 can be brought into contact with the approximate center position of the inspection terminal portion 911 (substantially the inspection terminal portion 911). The inspection probe 24 can be moved in the height direction aiming at the center position). Therefore, the inspection probe 24 can be reliably brought into contact with the inspection terminal portion 911.
- the inspection probe 24 and the inspection probe in the defect determination procedure are controlled by feedback control using the pressure sensor 22 and the moving unit 23 that moves the inspection probe 24 in the plane direction of the liquid crystal display panel 90.
- a good electrical contact state of the terminal portion 911 can be reliably realized.
- the control means After the inspection probe 24 and the inspection terminal portion 911 come into contact, the control means inputs an inspection signal to the liquid crystal display panel 90 through the inspection probe 24. And a lighting test
- the probe driving means 20 (probe driving air cylinder 21) is returned to the original position.
- transformation procedure which drives the 1 or several panel press means 10 (air cylinder 11 for press means), and elastically deforms the liquid crystal display panel 90 to another shape is performed.
- the defect determination procedure similar to the above is performed while maintaining this elastically deformed state. This is repeated to complete the inspection. That is, the deformed shape of the liquid crystal display panel 90 to be subjected to the lighting inspection is set in advance, and the lighting inspection is performed for all of the set deformed shapes of the liquid crystal display panel 90. The inspection ends when the lighting inspection is performed for all the deformed shapes.
- the panel deformation procedure includes the first procedure to the fourth procedure. That is, the liquid crystal display panel 90 is elastically deformed into four types of shapes, and a lighting inspection (defect determination procedure) is performed on the liquid crystal display panel 90 in each deformed state.
- the first procedure is a step of simultaneously pressing a predetermined part (a part indicated by P in FIG. 5B) of a total of four places provided at two places on the upper and lower sides of the display panel. It is. As a result, the display panel is elastically deformed in the left-right direction. Specifically, the upper edge and the lower edge of the display panel move in a lowering direction, and the substantially central portion in the vertical direction of the display panel becomes the highest. Thereafter, a lighting inspection (defect determination procedure) is performed to determine the presence or absence of defects in the deformed state.
- a lighting inspection defect determination procedure
- the second procedure is a step of simultaneously pressing a predetermined portion (portion indicated by P in FIG. 6 (b)) provided at two places on each of the left and right sides of the display panel. is there.
- a predetermined portion portion indicated by P in FIG. 6 (b)
- the display panel is elastically deformed in the vertical direction.
- the left and right edges of the display panel move in the direction of lowering, and the substantially central portion in the left and right direction of the display panel is in the highest state.
- a lighting inspection defect determination procedure
- the third procedure consists of two predetermined portions located so as to sandwich the upper left corner of the display panel and two predetermined portions located so as to sandwich the lower right corner (FIG. 7 (b ) In which a total of four locations indicated by P are simultaneously pressed.
- the display panel is elastically deformed in a diagonal direction extending from the upper right corner to the lower left corner. Specifically, the display panel moves in a direction in which the upper left corner and the upper right corner become lower, and the portion along the diagonal line extending from the upper right corner to the lower left corner of the display panel becomes the highest state.
- a lighting inspection defect determination procedure
- the fourth procedure includes two predetermined portions positioned so as to sandwich the upper right corner of the display panel and two predetermined portions positioned so as to sandwich the lower left corner (FIG. 8B).
- the display panel is elastically deformed in a diagonal direction extending from the upper left corner to the lower right corner.
- the upper right corner and the left corner of the display panel move in the direction of lowering, and the portion along the diagonal line extending from the upper left corner of the display panel to the lower right corner becomes the highest state.
- a lighting inspection defect determination procedure
- the operation procedure of the panel pressing means 10 does not have to be performed in the order of the first procedure, the second procedure, the third procedure, and the fourth procedure, and the order can be changed.
- the display panel is deformed in the up and down direction, the left and right direction, and two diagonal directions, and a lighting inspection is performed to check whether there is a defect in each deformed state. Therefore, it is possible to find a defect that may not be found by a lighting inspection in only one deformed state.
- the operation procedure of the panel pressing means 10 is just a preferable example. If the liquid crystal display panel 90 is configured so that the elastically deformed state is similar to the state when the liquid crystal display panel 90 is incorporated in a frame of a display device including a bezel or the like, the pressing member 12 is used. The position, pressure, order, and the like pressed by can be changed as appropriate.
- the liquid crystal display panel inspection apparatus 1 includes the panel pressing means 10 that presses a predetermined portion in the area 902 outside the image display area 901, the panel is elastically deformed (in a predetermined shape).
- the inspection probe 24 can be brought into contact (performed lighting inspection) in a bent state). Therefore, a defect due to the mixing of foreign matters that has become apparent for the first time as a display device in which a slight distortion has conventionally occurred can be found in the state of the liquid crystal display panel 90. As a result, the reliability of the inspection is improved and the manufacturing cost (inspection cost) of the display device is reduced.
- the panel pressing means 10 is configured to be able to selectively press a plurality of predetermined portions of the liquid crystal display panel 90, the liquid crystal display panel 90 can be elastically deformed into various shapes. For this reason, a defect due to mixing of foreign matters is detected more reliably. That is, the reliability of inspection is further improved.
- the panel pressing means 10 selectively selects a total of eight predetermined portions provided to be vertically and horizontally symmetrical about the center lines Cx and Cy that bisect the liquid crystal display panel 90. If the liquid crystal display panel 90 is elastically deformed in the vertical direction, the horizontal direction, and the two diagonal directions, the inspection probe 24 can be brought into contact.
- the inspection apparatus 1 contacts the inspection probe 24 in a state where the liquid crystal display panel 90 is elastically deformed, the liquid crystal display panel 90 (inspection) depends on the deformation state (deformation amount, etc.) of the liquid crystal display panel 90.
- the distance between the terminal section 911) and each inspection probe 24 changes. Therefore, when the probe driving means 20 is configured so that the inspection probe 24 always operates in the direction of the liquid crystal display panel 90 during inspection, the inspection probe 24 and the inspection terminal portion 911 are close to each other. If an excessive force is applied to the inspection probe 24 and the inspection probe 24 is damaged, and the distance between the inspection probe 24 and the inspection terminal portion 911 is long, the inspection probe 24 and the inspection terminal portion 911 are not connected.
- the force that the inspection probe 24 receives from the inspection terminal portion 911 by the pressure sensor 22 is within a predetermined range (the inspection probe 24 is not likely to be damaged, and the inspection probe 24 is not damaged).
- the inspection probe 24 is not likely to be damaged, and the inspection probe 24 is not damaged.
- the liquid crystal display panel 90 is inspected in an elastically deformed state, so that a good electrical contact state between the liquid crystal display panel 90 and the inspection terminal portion 911 can be obtained. Is prevented.
- the force received from the inspection terminal portion 911 is within a predetermined range by adjusting the air pressure supplied to the air cylinder. It is controlled to become.
- the configuration of the probe driving means 20 is easy, and the pressure control of the inspection probe 24 is easy.
- the inspection probe 24 for inspection is brought into contact with the liquid crystal display panel 90 in an elastically deformed state. Therefore, depending on the deformation state (deformation amount, etc.) of the liquid crystal display panel 90, the liquid crystal display panel 90.
- the position of the inspection terminal portion 911 in the plane direction changes slightly.
- the moving unit 23 for moving the inspection probe 24 in the plane direction of the liquid crystal display panel 90 is provided, the liquid crystal display panel 90 is inspected in the plane direction by elastic deformation of the liquid crystal display panel 90. Even when the position of the inspection terminal portion 911 changes, the position of the inspection probe 24 in the plane direction of the liquid crystal display panel 90 is adjusted so that the inspection probe 24 comes into contact with the approximate center of the inspection terminal portion 911. be able to. That is, the inspection probe 24 and the inspection terminal portion 911 can be reliably brought into electrical contact.
- the inspection probe 24 is brought into contact with the panel in an elastically deformed state (lighting inspection is performed). It is possible to find in the state of the liquid crystal display panel 90 a defect due to the mixing of foreign matters that has become apparent for the first time as an apparatus. As a result, the reliability of the inspection is improved and the manufacturing cost (inspection cost) of the liquid crystal display device is reduced.
- the defect determination procedure is performed for each of the liquid crystal display panels 90 elastically deformed into a predetermined shape by the first to fourth procedures. That is, since the lighting inspection is performed by deforming the liquid crystal display panel 90 in various states, the reliability of the inspection is improved.
- the inspection apparatus 1 (inspection method) has been described by taking the liquid crystal display panel 90 as an example of the object to be inspected, but it can also be applied to other display panel inspection apparatuses (inspection methods).
- actuators other than air cylinders can be adopted as the actuators used for the panel pressing means 10 and the probe driving means 20.
- the actuator used for the probe driving means 20 needs to be able to control the distance (the pressure at which the inspection probe 24 contacts the inspection terminal portion 911) at which the inspection probe 24 moves back and forth.
Abstract
Description
まず、本発明の一実施形態にかかる表示パネルの検査装置1(以下、単に検査装置1という)によって検査される被検査体である液晶表示パネル90について簡単に説明する。
本実施形態にかかる検査装置1は、液晶表示パネル90の所定の部分を押圧するパネル押圧手段10と、液晶表示パネル90の点灯検査に用いられる検査用のプローブを動作させるプローブ駆動手段20と、これらを制御する図示されない制御手段と、を備える。また、検査装置1は、被検査体である液晶表示パネル90が載置されるベース30を備える。かかるベース30は、その外周縁に沿う一定幅の領域が弾性体で形成された受け部31となっている。具体的には、液晶表示パネル90がベース30の所定位置に載置された状態で、液晶表示パネル90の外側の領域902(後述する所定部分が設けられる領域)が受け部31に接触するように設定されている。なお、液晶表示パネル90がベース30の所定の位置に載置されるように、検査装置1には図示されない位置決め部材が設けられている。
上記検査装置1を用いた検査方法(検査装置1の動作)について説明する。まず、被検査体である液晶表示パネル90を検査装置1のベース30上に載置する。この際、検査装置1に設けられた図示されない位置決め部材を利用して、液晶表示パネル90をベース30の所定位置に載置する。これにより、液晶表示パネル90の各所定部分(外側の領域902)が、弾性体で形成されたベース30の受け部31に支持された状態(検査装置1の高さ方向に重なった状態)となる。
以上説明した本実施形態にかかる検査装置1(液晶表示パネルの検査方法)によれば、次のような作用効果が奏される。
Claims (8)
- 表示パネルの画像表示領域の外側の領域における所定部分を押圧するパネル押圧手段と、
表示パネルの側縁に沿って設けられた表示パネルの信号配線と電気的に接続された端子部に対して検査用のプローブを接触させるプローブ駆動手段と、
を備えることを特徴とする表示パネルの検査装置。 - 前記パネル押圧手段は、前記表示パネルの画像表示領域の外側の領域における複数箇所の所定部分を選択的に押圧可能に構成されていることを特徴とする請求項1に記載の表示パネルの検査装置。
- 前記パネル押圧手段は、前記表示パネルの各側縁に沿う各外側の領域に二箇所ずつ、前記表示パネルを二分する中央線を対称軸として上下左右対称となるように計八箇所に設けられた所定部分を選択的に押圧可能に構成されていることを特徴とする請求項1に記載の表示パネルの検査装置。
- 前記プローブ駆動手段は、
前記プローブを前記端子部に対して進退動作させるアクチュエータと、
前記端子部に接触する前記プローブが前記端子部から受ける力を測定する圧力センサと、
前記圧力センサによって測定される前記プローブが前記端子部から受ける力が所定の範囲内になるように、前記アクチュエータの動力を調整する制御手段と、
を有することを特徴とする請求項1から請求項3のいずれか一項に記載の表示パネルの検査装置。 - 前記アクチュエータはエアシリンダであり、前記制御手段は前記エアシリンダに供給する空気圧を制御することにより、前記端子部から受ける力が所定の範囲内になるように調整することを特徴とする請求項4に記載の表示パネルの検査装置。
- 前記プローブ駆動手段は、前記プローブを前記表示パネルの平面方向に移動させる移動ユニットを有することを特徴とする請求項1から請求項5のいずれか一項に記載の表示パネルの検査装置。
- 表示パネルを一または複数の所定の形状に弾性的に変形させるパネル変形手順と、
このパネル変形手順によって前記表示パネルが所定の形状に変形した状態で、前記表示パネルの側縁に沿って設けられた表示パネルの信号配線と電気的に接続された端子部に対して検査用のプローブを接触させ、表示パネルの画像表示領域における欠陥の有無を判定する欠陥判別手順と、
を含む表示パネルの検査方法。 - 前記パネル変形手順は、
前記表示パネルの上側および下側に各二箇所ずつ設けられた計四箇所の前記所定部分を同時に押圧し、前記表示パネルを左右方向に変形させる第一手順と、
前記表示パネルの左側および右側に各二箇所ずつ設けられた計四箇所の前記所定部分を同時に押圧し、前記表示パネルを上下方向に変形させる第二手順と、
前記表示パネルの左上の角を挟むように位置する二箇所の前記所定部分および右下の角を挟むように位置する二箇所の前記所定部分を同時に押圧し、前記表示パネルを右上の角から左下の角に延びる対角線方向に変形させる第三手順と、
前記表示パネルの右上の角を挟むように位置する二箇所の前記所定部分および左下の角を挟むように位置する二箇所の前記所定部分を同時に押圧し、前記表示パネルを左上の角から右下の角に延びる対角線方向に変形させる第四手順と、
を含み、
これら各手順によって前記表示パネルが所定の形状に変形した状態で、前記欠陥判別手順を行う、請求項3から6のいずれか一項に記載の表示パネルの検査装置を用いた請求項7に記載の表示パネルの検査方法。
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CN104020590A (zh) * | 2013-03-01 | 2014-09-03 | 深圳市海洋王照明工程有限公司 | 一种液晶显示屏抗扭力性能测试方法 |
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JP2015134477A (ja) * | 2014-01-17 | 2015-07-27 | 大日化成工業株式会社 | 合成樹脂板の自動接着装置 |
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JP2016062099A (ja) * | 2014-09-18 | 2016-04-25 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 表示装置のテスト装置及びテスト装置を利用するテスト方法 |
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