TWI485358B - Closure plate body inspection apparatus and method - Google Patents

Description

Laminated plate inspection device and method Technical field

The present invention relates to a laminated plate-shaped object inspection apparatus and method for performing inspection of air bubbles in an adhesive agent based on inspection image information obtained by photographing a laminated plate-like body, and the laminated plate-like system is configured by The above-mentioned adhesive agent bonded two sheets of a light-transmitting plate-like body.

Background technique

Conventionally, a bubble inspection device disclosed in Patent Document 1 is known. This bubble inspection device performs inspection of bubbles in the paste in the test object (bonded plate-like body) having the following structure, that is, a transparent polarizing film (plate shape) on which one side of the paste (adhesive) is applied The body is adhered to the glass substrate (plate-like body) by the paste. Specifically, the illuminating device and the CCD camera are disposed to face the polarizing film of the object to be inspected, and the CCD camera photographs the object to be inspected from the side of the polarizing film while being illuminated by the illuminating device. Further, the image signal output from the CCD camera is binarized with a predetermined threshold value. In the surface of the bubble in the paste, the light from the illumination device is reflected. Therefore, in the image represented by the image data obtained by the binarization described above, the bubble portion is completely brightly observed. Further, the area of the bubble portion which is fully brightly displayed on the image is measured by the shape feature amount of the corresponding bubble.

Advanced technical literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 8-189903

Summary of invention

In the conventional bubble inspection device as described above, since the image signal from the CCD camera is binarized by a predetermined threshold value, image data is generated, and therefore, the image signal is lower than the aforementioned threshold value. Bubbles at the level of the level are not detected. For example, bubbles that are not in the focus position of the CCD camera and in the vicinity thereof may not be vividly captured, and are represented in the image signal at a level lower than the aforementioned threshold level. Therefore, it is impossible to detect many bubbles dispersed in the adhesive (paste) with good precision.

The present invention has been made in view of such circumstances, and provides a laminated plate-shaped inspection apparatus and method capable of obtaining the following information, that is, a majority of an adhesive which is spread over two subsequent light-transmissive plate-like bodies Bubbles, whose size is expressed with good precision.

The laminated plate-shaped object inspection apparatus according to the present invention is configured to perform inspection of air bubbles in an adhesive agent based on inspection image information obtained by photographing a laminated plate-like body, and the laminated plate-like system is configured to borrow In the above-mentioned adhesive, two sheets having a light-transmissive plate-like body are bonded, and the laminated plate-shaped object inspection device includes a line sensor camera that is disposed in one of the bonded plate-shaped bodies. The opposite of the plate body; The illuminating mechanism is configured to illuminate the line sensor camera from the side of the plate-like body of the other of the bonded plate-like bodies; and the processing unit is configured to process the line sense in a state of being illuminated by the illumination mechanism The detector camera scans the image signal output from the line sensor camera when the plate body is pasted; the processing unit has an inspection image information generating mechanism, and the inspection image information generating mechanism is based on the line sensor from the line sensor The image signal of the camera generates inspection image information composed of the gradation value of the pixel unit, and the optical conditions of the illumination mechanism and the line sensor camera are adjusted to use the gradation value of the pixel unit In the inspection image indicated by the inspection image information, the bubble portion is represented by a dark ring in a bright background, and the processing unit further has a bubble size information generating mechanism, and the bubble size information generating mechanism is obtained from the foregoing Checking the image information for the gradation value of the direction in which the dark ring is transversely cut, according to the two dark portions corresponding to the aforementioned dark ring On the aforementioned inspection image, the bubble size information indicating the size of the bubble is generated as the inspection result information.

Moreover, the laminated plate-shaped object inspection method according to the present invention has a structure in which an inspection of bubbles in an adhesive is performed using a bonded plate-shaped inspection device, and the bonded plate-shaped inspection device includes a line sense. The detector camera is disposed in a plate-like body opposite to one of the bonded plate-like members configured to bond two sheets of the light-transmissive plate-like body by the above-mentioned adhesive; the illumination mechanism is from the foregoing a plate-like body side of the other of the plate-shaped body, facing the line sensor camera illuminator; and a processing unit for processing the line sensor camera to scan the sticker in a state of being illuminated by the illumination mechanism Image output from the line sensor camera when the plate is folded a signal detecting unit having the inspection image information generating step, wherein the inspection image information generating step is performed by the processing unit generating the gradation value of the pixel unit according to the image signal from the line sensor camera In the inspection image information of the configuration, the optical conditions of the illumination unit and the line sensor camera are adjusted to be in an inspection image represented by the inspection image information composed of the gradation values of the pixel units. The bubble portion is represented by a dark ring in a bright background, and the above-mentioned laminated plate inspection method further has a bubble size information generating step, and the bubble size information generating step is further obtained from the aforementioned inspection image information by the processing unit. The gradation value cross section in the direction in which the dark ring is transversely cut generates bubble size information indicating the size of the bubble as the inspection result information based on the distance between the two dark portions corresponding to the dark ring.

According to the laminated plate-like inspection apparatus and method according to the present invention, it is possible to obtain information on a plurality of bubbles existing in the adhesive agent of the two light-transmissive plate-like bodies. Good precision indicates its size.

Simple illustration

Fig. 1A is a structural sectional view showing a sensor panel assembly which is an example of a laminated plate-like body.

Fig. 1B is a plan view showing the structure of a sensor panel assembly which is an example of a laminated plate-like body.

FIG. 1C shows a touch panel type liquid crystal display in which the structure of the sensor panel assembly and the liquid crystal panel assembly shown in FIGS. 1A and 1B is adhered by an adhesive. A structural sectional view of the display panel.

Figure 2 is an enlarged cross-sectional view showing a section of the sensor panel assembly in an enlarged manner.

Fig. 3A is a view showing a basic configuration of a side view of a laminated plate-shaped inspection device (sensor panel assembly inspection device) according to an embodiment of the present invention.

Fig. 3B is a view showing a basic configuration seen from above the laminated plate-shaped inspection device (sensor panel assembly inspection device) according to the embodiment of the present invention.

Figure 4A shows a diagram of the relationship between the line sensor camera and the lighting unit (1).

Figure 4B shows a diagram of the relationship between the line sensor camera and the lighting unit (2).

Fig. 5 is a view showing a basic configuration of a processing system of a laminated plate-shaped inspection device (sensor panel assembly inspection device) according to an embodiment of the present invention.

Figure 6 is a flow chart showing the processing sequence for generating bubble size information.

Fig. 7 is a view showing a state (1) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Fig. 8 is a view showing a state (2) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Fig. 9 is a view showing a state (3) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Figure 10 shows an example of an inspection image containing a bubble portion (dark ring). Picture.

Fig. 11A is a view showing a relationship (1) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 11B is a view showing a relationship (2) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 11C is a view showing a relationship (3) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 12 is a cross-sectional view showing an example of a bubble which is located at a focus position of the line sensor camera in the adhesive and a bubble which is located before the focus position.

Fig. 13A is a view showing the relationship between the dark ring of the bubble portion corresponding to the inspection image of the bubble located at the focus position of the line sensor camera and the gradation value of the direction (main scanning direction) transverse to the dark ring. Figure.

Fig. 13B is a diagram showing the relationship between the dark ring of the bubble portion corresponding to the inspection image of the bubble located at the focus position of the line sensor camera and the gradation value of the direction (main scanning direction) transverse to the dark ring. .

Fig. 13C is a view showing a condensed value of a dark ring corresponding to a bubble portion of an inspection image of a bubble located behind a focus position of a line sensor camera and a direction (main scanning direction) transverse to the dark ring relation chart.

Fig. 14 is a view showing the bubble size of the gradation value section in the main scanning direction in which the dark ring of the bubble portion is transversely cut, and the bubble size of the gradation value section obtained from the sub-scanning direction transverse to the dark ring. Relationship correlation diagram.

Fig. 15 is a view showing a method of measuring a gradation value from a direction transverse to a dark ring of a bubble portion in an inspection image, and measuring a distance corresponding to a distance between two dark portions of the dark ring on the inspection image. A picture of another example.

Form for implementing the invention

Hereinafter, embodiments of the present invention will be described using the drawings.

An example of a laminated plate-like body constituting an inspection object will be described with reference to Figs. 1A to 1C. This example uses a sensor panel assembly that touches a panel type liquid crystal display panel. 1A is a cross-sectional view showing the structure of the sensor panel assembly 10, FIG. 1B is a plan view showing the structure of the sensor panel assembly 10, and FIG. 1C is a view showing the sensor panel assembly 10 being bonded by an adhesive. A structural cross-sectional view of a touch panel type liquid crystal display panel having a structure of the liquid crystal panel assembly 20.

In FIGS. 1A and 1B, the sensor panel assembly 10 is configured to be a sensor panel 11 (plate-like body) and a cover glass in which circuit components such as a sensor element or a gate are arranged. 12 (plate-shaped body) is attached by a total of light-transmitting adhesive 13 (resin) which has been applied to the sensor panel 11. The sensor panel 11 is configured to form a circuit component on a glass substrate, and constitutes a light transmissive field (although part of the circuit component is opaque). Further, the peripheral portion of the cover glass 12 constitutes an opaque region 12b (black field) having a predetermined width, and the inner region of the cover glass 12 constitutes a light-transmitting region 12a having a light transmissive property.

As shown in FIG. 1C, the sensor panel assembly 10 of such a structure is bonded to the liquid crystal panel assembly 20 by a light transmissive adhesive 15 It consists of a liquid crystal panel, a color filter, a polarizing plate, etc.). In the touch panel type liquid crystal display panel formed thereby, image display by the liquid crystal panel assembly 20 while sensing from the sensor panel 11 corresponding to the position on the cover glass 12 touched with a finger The device outputs a signal. Moreover, image display by the liquid crystal panel assembly 20 can be controlled by signals output from the respective sensor elements of the sensor panel 11.

In the process of manufacturing the sensor panel assembly 10 (bonding plate-like body) having the structure as described above, for example, as shown in Fig. 2, the bubble BL may be generated in the adhesive 13 in some cases. The inspection device for the bubble BL generated in the adhesive 13 in accordance with this, that is, the sensor panel assembly inspection device is constructed, for example, as shown in FIGS. 3A and 3B. In addition, the 3A diagram shows the basic configuration viewed from the side of the sensor panel assembly inspection device, and the 3B diagram shows the basic configuration viewed from above the sensor panel assembly inspection device.

In the 3A and 3B drawings, the sensor panel assembly inspection device includes a line sensor camera 50, a lighting unit 51, a reflector 52 (illumination mechanism), and a moving mechanism 60. The moving mechanism 60 linearly moves the sensor panel assembly 10 at a predetermined speed, and the sensor panel assembly 10 is disposed on the moving path with the sensor panel 11 facing upward and the cover glass 12 facing downward. The line sensor camera 50 includes, for example, an optical system (not shown) including a line sensor 50a and a lens group (which may include a magnifying lens for expanding a field of view) constituted by a CCD element array, and is fixedly arranged Opposite the sensor panel 11 of the sensor panel assembly 10 on the moving path. Moreover, the posture of the line sensor camera 50 is adjusted such that the direction of extension of the line sensor 50a crosses the moving direction A of the sensor panel assembly 10 (for example, orthogonal to the moving direction A), and its optical axis A _{The OPT} 1 is orthogonal to the surface of the sensor panel assembly 10 (sensor panel 11). The reflector 52 has a reflective surface that has been processed to diffuse and reflect incident light, and is disposed in the vicinity of the sensor panel assembly 10 on the moving path, and is fixedly disposed with its reflective surface and the cover glass 12 of the sensor panel assembly 10. to. The reflected light (illumination light) of the reflecting plate 52 (reflecting surface) thus arranged is illuminated from the side of the cover glass 12 of the sensor panel assembly 10 toward the line sensor camera 50.

The illumination unit 51 is attached to the downstream side of the line sensor camera 50 in the moving direction A of the sensor panel assembly 10 on the moving path, that is, the line sensing in the scanning direction B of the line sensor camera 50 described later. The upstream side of the camera 50 is disposed to face the sensor panel 11. The posture of the illumination unit 51 is adjusted to be obliquely above the self-sensor panel assembly 10, specifically, from the normal direction with respect to the surface of the sensor panel assembly 10 (sensor panel 11), its optical axis A _{The OPT 2} forms the direction of the predetermined angle a, illuminating the surface of the sensor panel assembly 10 and does not traverse the optical axis A _{OPT1 of the} line sensor camera 50. Further, as shown in FIGS. 4A and 4B, the illumination unit 51 is at a predetermined distance toward the downstream side of the moving direction A of the sensor panel assembly 10 (the upstream side of the scanning direction B of the line sensor camera 50), away from The photographing line Lc of the line sensor camera 50 in the surface of the sensor panel assembly 10 illuminates a predetermined area (hereinafter referred to as an illumination field) E _L extending in the direction along the photographing line Lc. By the illumination unit 51 in the lighting field E _L of the surface of the sensor panel assembly 10 located in the center of the illumination line perpendicular to a direction of the moving direction of the panel assembly 10 of the sensor A and the line sensor camera L _L The aforementioned photographing line Lc on the surface of the sensor panel assembly 10 is maintained at a predetermined interval, and the aforementioned illumination area E _L does not overlap the aforementioned photographing area E _C (not included) of the line sensor camera 50.

In the sensor panel assembly inspection device of the foregoing structure, the sensor panel assembly 10 is moved in the direction A on the moving path by the moving mechanism 60, thereby maintaining the line sensor camera 50 and illumination The relative positional relationship of the units 51, and the line sensor camera 50 optically scans the sensor panel assembly 10 in a direction B opposite to the aforementioned moving direction A. By this scanning, photographing of the sensor panel assembly 10 by the line sensor camera 50 is performed. In addition, due to the limitation of the length of the line sensor 50a, the entire area of the sensor panel assembly 10 cannot be scanned by the line sensor camera 50 scanning in the direction B at one time, so that the shooting area E _{C is} directed to the scanning direction B. The phase is moved in an orthogonal direction, and a full shot of the sensor panel assembly 10 is performed by a plurality of scans.

The processing system of the sensor panel assembly inspection device is constructed as shown in Fig. 5.

In FIG. 5, the line sensor camera 50, the display unit 71, and the operation unit 72 are connected to the processing unit 70. Moreover, the processing unit 70 generates an image sense by optically scanning the image signal of the line sensor camera 50 of the sensor panel assembly 10 in synchronization with the movement of the sensor panel assembly 10 by the moving mechanism 60. The inspection image information of the image (inspection image) of the detector panel assembly 10. That is, the processing unit 70 has an inspection image information generating mechanism that generates inspection image information based on the image signal from the line sensor camera 50. Moreover, the processing unit 70 causes the sensor panel assembly 10 to perform the inspection image information according to the foregoing The inspection image is displayed on the display unit 71. The inspection image can reveal the foreign matter in the circuit component of the sensor panel 11 or the adhesive 13 of the sensor panel assembly 10, and further the edge of the adhesive 13 and the air bubbles in the adhesive 13 as will be described later. In addition, the processing unit 70 can obtain information about various instructions in response to the operation of the operating unit 72, and generate various information (the size of the bubble or foreign matter, the position of the edge of the adhesive 13, etc.) from the aforementioned inspection image, and It is displayed on the display unit 71 as the inspection result information.

The processing unit 70 performs a process for detecting the size of the air bubbles present in the adhesive 13 of the sensor panel assembly 10 in the order shown in FIG.

In FIG. 6, the processing unit 70 is controlled to move the sensor panel assembly 10 by the moving mechanism 60 in a state where illumination from the illumination unit 51 is performed, and the line sensor camera 50 is optically scanned. Sensor panel assembly 10 (S11). In the process, when the photographing area E _{C of the} moving line sensor camera 50 corresponds to a portion of the light transmitting region 12a of the cover glass 12, it is obliquely incident on the surface of the sensor panel 11 at a predetermined angle α (refer to the third aspect). The illumination light R _L1 from the illumination unit 51 is refracted in the sensor panel 11 (transparent field), the adhesive 13 and the cover glass 12 (transparent field 12a), for example, as shown in FIGS. 7 to 9. And pass through to the reflector 52. Moreover, the illumination light R _L1 is diffused and reflected by the reflection plate 52, and a part of the reflected light is made into the illumination light R _L2 and is sensed from the side cover glass 12 (light transmission field 12a) of the sensor panel assembly 10 Camera 50 advances. Accordingly, the line sensor camera 50 is configured to perform illumination (illumination light R _L1 ) from the side of the sensor panel 11 using the illumination unit 51 and illumination from the side of the cover glass 12 by the reflection plate 52 (illumination light R _{L2 )} In the state of the sensor panel assembly 10 is scanned.

In the foregoing scanning process, as an example, as shown in FIG. 7, if the illumination light R _L2 (reflected light) from the reflecting plate 52 is attached to the sensor panel 10, the adhesive 13 is free of bubbles BL. Partial advancement is incident on the line sensor camera 50 directly through the sensor panel 11. For example, as shown in FIG. 8, if the illumination light R _L2 by the reflection plate 52 passes through the outer surface of the bubble BL in the adhesive 13, the illumination light R _L2 will pass through the surface of the bubble BL. The refraction or scattering (e.g., Mie scattering) is not sufficiently incident on the line sensor camera 50. For example, as shown in FIG. 9, if the illumination light R _L2 passes through the central portion of the bubble BL, the illumination light R _L2 is scattered (for example, Brill scattering) and can be incident on the line sensor camera. 50.

Returning to Fig. 6, as described above, the processing unit 70 (the inspection image information generating mechanism included in the processing unit 70) is in accordance with the state in which the line sensor camera 50 is illuminated by the illumination light R _L2 from the reflection plate 52. When the sensor panel assembly 10 is scanned, the image signal output from the line sensor camera 50 is generated, and inspection image information composed of the gradation value (for example, 256 gradation) of the pixel (corresponding to the CCD element) is generated (S12). . As shown in FIGS. 7 to 9, since the illumination light R _L2 from the reflection plate 52 is different in accordance with the presence or absence of the bubble BL in the adhesive 13, the inspection chart indicated by the aforementioned inspection image information is used. For example, in I, as shown in Fig. 10, each of the bubble portions I _BL1 , I _BL2 , and I _BL3 is represented by a dark ring in a bright background.

The focus position of the line sensor camera 50 is set at a substantially central portion of the thickness direction of the adhesive 13 of the sensor panel assembly 10, while other optical conditions of the line sensor camera 50 (relative to the sensor panel assembly) The position of the 10, the reduction, etc., and the optical conditions of the illumination unit 51 and the reflector 52 (relative to the position, slope, amount of light, etc. of the sensor panel assembly 10) are adjusted to the bubble BL in the adhesive. As in the case of I, the dark ring is expressed as clearly as possible in the bright background as described above.

If the processing unit 70 generates the inspection image information (the gradation value of the pixel unit) of the inspection image I expressed by the dark ring in the bright background as described above (S12), the processing image obtained from the processing unit 70 Information, extracting an inspection field (for example, a rectangular field) containing a bubble portion (S13). In addition, the inspection field may also be extracted according to an area specified by the user using the operation unit 72 on the inspection image displayed on the display unit 71 according to the inspection image information, or may be included as described above. The field of the dark ring is image-processed and extracted.

The processing unit 70 is configured to convert a dark ring representing a bubble portion included in the inspection field extracted from the self-inspection image information, for example, a gradation value section of the main scanning direction transverse to the maximum diameter position thereof, according to the dark ring corresponding to the dark ring The distance between the dark portions generates the first bubble size information Dx indicating the size of the bubble (S14). Specifically, as shown in FIGS. 11A to 11C, the gradation value profiles PF _S and PF _M in the main scanning direction which are transverse to the dark ring of the bubble portions I _BLS , I _BLM , and I _{BLL are shown} . PF _L (the gradation of the 256th order) detects the pixel positions P _B1 and P _B2 corresponding to the two lowest values of the dark ring. Further, the first bubble size information Dx _S , Dx _M , and Dx _{L are} generated based on the distance between the pixel positions P _B1 and P _B2 . At this time, the first bubble size information Dx _S obtained from the smallest bubble portion I _BLS (see FIG. 11A ) constitutes the smallest value, and the first bubble size obtained from the largest bubble portion I _BLL (see FIG. 11C ) is obtained. The information Dx _L system constitutes the largest value. Further, the first bubble size information Dx _M obtained from the bubble portion I _BLM (refer to FIG. 11B) larger than the smallest bubble portion I _BLS and smaller than the largest bubble portion I _BLL constitutes a value larger than Dx _S and smaller than Dx _L .

Next, in the same manner as in the case of the main scanning direction described above, the processing unit 70 is a gradation section in a sub-scanning direction in which a dark ring indicating a bubble portion included in the inspection region is transversely cut at a maximum diameter position thereof, according to the dark ring corresponding thereto. The distance between the pixel positions of the two lowest values generates the second bubble size information Dy indicating the size of the bubble (S15). Further, the processing unit 70 determines whether or not the difference between the first bubble size information Dx and the second bubble size information Dy is equal to or smaller than a predetermined value Δ (S16). When the difference between the first bubble size information Dx and the second bubble size information Dy is equal to or less than a predetermined value Δ (YES in S16), the processing unit 70 forms the first bubble size information Dx as a check about the size of the bubble. The result information D is displayed (output) on the display unit 71. On the other hand, when the difference between the first bubble size information Dx and the second bubble size information Dy is larger than a predetermined value Δ (NO in S16), the processing unit 70 sets the first bubble size information Dx and the foregoing The average value information ((Dx+Dy)/2) of the bubble size information Dy is displayed (output) on the display unit 71 in accordance with the inspection result information on the size of the bubble. That is, the processing unit 70 has a bubble size information generating mechanism, and the bubble size information generating mechanism generates bubble size information indicating the size of the bubble as the inspection result information.

The processing unit 70 performs the aforementioned processing (S13 to S17 or S13 to S16, S18) for each of the inspection image fields that have been extracted (S19). Further, if the processing is completed for all the inspection image fields (YES in S19), the processing unit 70 ends the processing regarding the size detection of the air bubbles.

However, as described above, the focus position of the line sensor camera 50 is set at a substantially central portion of the thickness direction of the adhesive 13 of the sensor panel assembly 10. However, in the adhesive 13, for example words, as shown in FIG. 12, not only the state of the focus positioned on a focus position S _FOCUS bubbles BL _ON, there may also be located closer than the focal position of the sense lines S _FOCUS The bubble BL _IN in the in-focus state at the position of the detector camera 50 or the bubble BL _{OUT in the} out-of-focus state located farther from the position of the line sensor camera 50 than the focus position S _FOCUS . At this time, the bubbles BL _IN and BL _{OUT which are} not in the focus position S _FOCUS cannot be vividly captured. The bubble BL _{IN in the in-} focus state is, for example, as shown in FIG. 13A, as compared with the bubble BL _ON (dark ring IBL _ON ) in the in-focus state shown in FIG. 13B, and can be fine on the inspection image. Dark ring IBL _IN to perform. Further, compared with the bubble BL _ON (dark ring IBL _ON ) in the above-described state of focus, the bubble BL _OUT with respect to the out-of-focus state is, for example, as shown in FIG. 13C, and can be shallow and blurred on the inspection image. Ring IBL _OUT to perform.

Accordingly, according to the position of the bubble in the thickness direction of the adhesive 13, the darkness state of the bubble portion in the inspection image is different, however, regardless of the composition, as shown in Figs. 13A to 13C, the bubble portion can be Dark ring to express. Accordingly, as long as the dark ring can be expressed, any of the bubbles BL _IN , BL _ON , and BL _{OUT in the in-} focus state, the in-focus state, and the out-of-focus state can be processed according to the foregoing (S13 to S17 or S13 to S16, S18), as shown in Figs. 13A to 13C, the gradation profile PF _IN , PF _ON in the main scanning direction which _indicates the dark ring of the bubble portions I _BLIN , I _BLON , and I _{BLOUT at} the maximum diameter position thereof PF _OUT detects the pixel positions P _B1 and P _B2 corresponding to the two lowest values of the dark ring. Further, the first bubble size information Dx _IN , Dx _ON , and Dx _{OUT are} generated based on the distance between the pixel positions P _B1 and P _B2 . Further, in the same manner, the second bubble size information is generated from the shading section in the sub-scanning direction in which the dark ring is transversely cut at the maximum radial position.

According to the inspection apparatus as described above, the image signal of the line sensor camera 50 configured to sandwich the sensor panel 11 of the sensor panel 11 and the cover glass 12 by the adhesive 13 can be used. And generating a check image information, and a gradation profile of a main scanning direction (sub-scanning direction) transverse to the dark ring represented by the bubble portion in the inspection image indicated by the inspection image information, according to the foregoing The distance between the two dark portions (the lowest value position) of the dark ring on the inspection image generates the first bubble size information Dx (the second bubble size Dy) indicating the size of the bubble. Accordingly, the line sensor camera positioned 50 the focal position of the bubble BL _ON S _FOCUS granted, and not even in the focal position of the various S _FOCUS bubbles BL _IN, BL _OUT, it can be obtained with good accuracy can be Information indicating its size, and without changing the optical conditions (e.g., focus position) of the line sensor camera 50.

Further, the first bubble size information Dx obtained from the shading profile in the main scanning direction transverse to the maximum diameter position of the dark ring is obtained from the sub-scanning direction obtained by crossing the dark ring at its maximum radial position. The second bubble size information Dy of the shading profile generates information indicating the size of the bubble, so that information indicating the size of the bubble with good precision can be obtained.

Further, in the above-described inspection apparatus, for the bubbles of respective sizes, as shown in FIG. 14, the posture or position of the line sensor camera 50, the inclination or position of the illumination unit 51 and the reflection plate 52 can be adjusted. Etc., obtaining the first bubble size information Dx of the gradation value profile of the autonomous scanning direction and obtaining The second bubble size information Dy from the gradation value section in the sub-scanning direction is substantially equal. By doing so, it is not necessary to use the average information of the first bubble size information Dx and the second bubble size information Dy (refer to S18), and the size of the bubble can be checked with high precision.

Specifically, for example, the posture or position of the line sensor camera 50 can be adjusted with good precision as the direction of extension of the line sensor 50a to move the direction A of the sensor panel assembly 10 (eg, and move). The direction A is orthogonally transected, and its optical axis A _OPT1 is orthogonal to the surface of the sensor panel assembly 10 (sensor panel 11) and the reflector 52, and is adjusted to the illumination light RL1 from the illumination unit 51. The optical axis A _{OPT1 of the} line sensor camera 50 intersects on the surface of the reflecting plate 52 with good precision (refer to Figs. 7 to 9). By such adjustment, for example, as shown in FIG. 9, the illumination light R _L1 is diffused and reflected on the surface of the reflection plate 52, and the illumination light R _L2 belonging to a part of the reflected light is along the line sensor camera. The optical axis A _{OPT1 of} 50 advances, and the bubble BL is illuminated from directly below, and the line sensor camera 50 receives the illumination light R _{L2 that has} passed through the bubble BL directly from the bubble BL. As a result, in the inspection image information generated by the image signal output from the line sensor camera 50, the diameters of the two directions (the main scanning direction and the sub-scanning direction) of the bubble BL can be substantially equal. This is a natural matter when the bubble BL is assumed to be a complete sphere. However, even in the case of the bubble BL having a slightly skewed shape, the first bubble size information Dx and the second are compared with the case where the bubble BL is irradiated from the oblique direction. The difference between the bubble size information Dy is reduced, and the probability that the difference is equal to or less than the predetermined value Δ is increased. As a result, it is not necessary to use the average information of the first bubble size information Dx and the second bubble size information Dy, and the probability of checking the size of the bubble with higher precision is improved.

Further, when adjusting the posture or position of the line sensor camera 50, the inclination or position of the illumination unit 51 and the reflection plate 52, etc., if the sensor panel assembly 10 in which bubbles belonging to the sphere are present in advance is used, When the first bubble size information Dx obtained is substantially equal to the second bubble size information Dy, it can be determined that the above-described adjustment with good precision has been performed.

In the foregoing example, the reflecting plate 52 that reflects the light from the illumination unit 51 is used as an illumination mechanism, and the line sensor camera 50 that is opposite to the sensor panel 11 is illuminated from the side of the cover glass 12, however, The illumination unit is configured to face the cover glass 12, and the illumination unit is illuminated directly from the cover glass 12 side toward the line sensor camera 50.

In addition, the bubble size information (the first bubble size information and the second bubble size information) is obtained by creating a gradation cross section in the main scanning direction or the sub-scanning direction in which the dark ring is transversely cut at the maximum diameter position. However, the present invention is not limited thereto. The bubble size information may also be obtained from the gradation profile in any direction transversely cut by the dark ring, or the bubble size information may be obtained from the gradation profile in the direction transverse to the predetermined position other than the maximum diameter position.

Furthermore, the distance between the pixel positions P _B1 and P _B2 corresponding to the two lowest values of the dark ring is detected as the distance between the two dark portions of the dark ring, but is not limited thereto. For example, as shown in FIG. 15, the widths W1 and W2 of the two dark portions of the dark ring may be detected from the shading profile PF of the direction in which the dark ring is transversely cut at the maximum diameter position, and the width W1 is detected. The distance between the center positions P1 and P2 of W2 is the distance between the two dark portions corresponding to the dark ring.

10‧‧‧Sensor panel assembly (fitting panel)

11‧‧‧Sensor panel (plate body)

12‧‧‧Cover glass (plate-like body)

12a‧‧‧Transparent field

12b‧‧‧ opaque field

13,15‧‧‧Binder

20‧‧‧LCD panel components

50‧‧‧ line sensor camera

50a‧‧‧ line sensor

51‧‧‧Lighting unit (lighting mechanism)

52‧‧‧Reflecting plate (lighting mechanism)

60‧‧‧Mobile agencies

70‧‧‧Processing unit

71‧‧‧Display unit

72‧‧‧Operating unit

A‧‧‧ moving direction

A _OPT1 , A _OPT2 ‧‧‧ optical axis

B‧‧‧Scanning direction

BL, BL _IN , BL _ON , BL _OUT ‧‧‧ bubbles

D‧‧‧Check result information

Dx, Dx _IN , Dx _L , Dx _M , Dx _ON , Dx _OUT , Dx _S ‧‧‧1st bubble size information

Dy‧‧‧2nd size information

E _C ‧‧‧The field of photography

E _L ‧‧‧Lighting field

I‧‧‧Check the image

IBL _IN , IBL _ON , IBL _OUT ‧‧‧ Dark Ring

I _BL1 , I _BL2 , I _BL3 , I _BLIN , I _BLL , I _BLM , I _BLON , I _BLOUT , I _BLS ‧‧‧ bubble part

Lc‧‧‧ shooting line

L _L ‧‧‧Lighting line

P1, P2‧‧‧ central location

P _B1 , P _B2 ‧ ‧ pixel position

PF, PF _IN , PF _L , PF _M , PF _ON , PF _OUT , PF _S ‧ ‧ 浓 值

R _L1 , R _L2 ‧‧‧ illumination light

S _FOCUS ‧‧‧ focus position

S11~S19‧‧‧Steps

W1, W2‧‧‧ width

α‧‧‧Predetermined angle

Fig. 1A is a structural sectional view showing a sensor panel assembly which is an example of a laminated plate-like body.

Fig. 1B is a plan view showing the structure of a sensor panel assembly which is an example of a laminated plate-like body.

Fig. 1C is a cross-sectional view showing the structure of a touch panel type liquid crystal display panel in which the structure of the sensor panel assembly and the liquid crystal panel assembly shown in Figs. 1A and 1B is bonded by an adhesive.

Figure 2 is an enlarged cross-sectional view showing a section of the sensor panel assembly in an enlarged manner.

Fig. 3A is a view showing a basic configuration of a side view of a laminated plate-shaped inspection device (sensor panel assembly inspection device) according to an embodiment of the present invention.

Fig. 3B is a view showing a basic configuration seen from above the laminated plate-shaped inspection device (sensor panel assembly inspection device) according to the embodiment of the present invention.

Figure 4A shows a diagram of the relationship between the line sensor camera and the lighting unit (1).

Figure 4B shows a diagram of the relationship between the line sensor camera and the lighting unit (2).

Fig. 5 is a view showing a basic configuration of a processing system of a laminated plate-shaped inspection device (sensor panel assembly inspection device) according to an embodiment of the present invention.

Figure 6 is a flow chart showing the processing sequence for generating bubble size information.

Fig. 7 is a view showing a state (1) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Fig. 8 is a view showing a state (2) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Fig. 9 is a view showing a state (3) of the illumination light from the illumination unit and the reflected light of the illumination light on the reflection plate which are advanced in the sensor panel assembly.

Fig. 10 is a view showing an example of an inspection image including a bubble portion (dark ring).

Fig. 11A is a view showing a relationship (1) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 11B is a view showing a relationship (2) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 11C is a view showing a relationship (3) between the dark ring of the bubble portion included in the inspection image and the gradation value profile in the direction (main scanning direction) in which the dark ring is transversely cut.

Fig. 12 is a cross-sectional view showing an example of a bubble which is located at a focus position of the line sensor camera in the adhesive and a bubble which is located before the focus position.

Fig. 13A is a view showing the relationship between the dark ring of the bubble portion corresponding to the inspection image of the bubble located at the focus position of the line sensor camera and the gradation value of the direction (main scanning direction) transverse to the dark ring. Figure.

Fig. 13B is a view showing a dark ring representing a bubble portion corresponding to an inspection image of a bubble located at a focus position of the line sensor camera, and a horizontal ring of the dark ring A plot of the gradation profile of the cut direction (main scan direction).

Fig. 13C is a view showing a condensed value of a dark ring corresponding to a bubble portion of an inspection image of a bubble located behind a focus position of a line sensor camera and a direction (main scanning direction) transverse to the dark ring relation chart.

Fig. 14 is a view showing the bubble size of the gradation value section in the main scanning direction in which the dark ring of the bubble portion is transversely cut, and the bubble size of the gradation value section obtained from the sub-scanning direction transverse to the dark ring. Relationship correlation diagram.

Fig. 15 is a view showing a method of measuring a gradation value from a direction transverse to a dark ring of a bubble portion in an inspection image, and measuring a distance corresponding to a distance between two dark portions of the dark ring on the inspection image. A picture of another example.

Dx _M ‧‧‧1st bubble size information

I _BLM ‧‧‧ bubble section

PF _M ‧‧‧dense profile

P _B1 , P _B2 ‧ ‧ pixel position

Claims (10)

A laminated plate-shaped object inspection device that performs inspection of air bubbles in an adhesive agent based on inspection image information obtained by photographing a laminated plate-like body, and the laminated plate-like system is configured to be bonded by the above-mentioned adhesive The sheet-shaped body having a light-transmissive property, wherein the laminated plate-shaped object inspection apparatus includes: a line sensor camera disposed to face the plate-like body of one of the bonded plate-shaped bodies; The illuminating mechanism is configured to illuminate the line sensor camera from the side of the plate-like body of the other of the bonded plate-like bodies; and the processing unit is configured to process the line sense in a state of being illuminated by the illumination mechanism The detector camera scans the image signal output from the line sensor camera when the plate body is pasted; the processing unit has an inspection image information generating mechanism, and the inspection image information generating mechanism is based on the line sensor from the line sensor The image signal of the camera generates inspection image information composed of the gradation value of the pixel unit, and the optical conditions of the illumination mechanism and the line sensor camera are adjusted to In the inspection image represented by the aforementioned inspection image information composed of the gradation values of the pixel units, the bubble portion is expressed by a dark ring in a bright background, and the processing unit further has a bubble size information generating mechanism. And the bubble size information generating mechanism is obtained from the gradation value section obtained from the inspection image information in a direction transverse to the dark ring, according to The distance between the two dark portions of the dark ring on the inspection image generates bubble size information indicating the size of the bubble as the inspection result information. The bonding plate inspecting device according to claim 1, wherein the bubble size information generating mechanism obtains a pixel position corresponding to a lowest value of the dark portion corresponding to the dark portion of the dark ring. The distance is used as the distance between the two dark portions. The laminated plate inspection device according to claim 1 or 2, wherein the bubble size information generating mechanism is a main scanning of the line sensor camera that crosses the dark ring obtained from the inspection image information. The faint and light value profile of the direction generates the bubble size information. The laminated plate inspection device according to claim 1 or 2, wherein the bubble size information generating mechanism is a sub-scan of the line sensor camera that crosses the dark ring obtained from the inspection image information. The faint and light value profile of the direction generates the bubble size information. The laminated plate-shaped object inspection apparatus according to the first or second aspect of the invention, wherein the bubble size information generating means generates the gradation value profile in a plurality of directions obtained by traversing the dark ring from the inspection image information. Bubble size information. The laminated plate-shaped inspection device according to claim 5, wherein the plurality of directions in which the dark ring is transversely cut includes a main scanning direction and a sub-scanning direction of the line sensor camera. The laminated plate-shaped object inspection apparatus according to claim 5, wherein the bubble size information generating means obtains a gradation value profile from the plurality of directions, and obtains between the two dark portions corresponding to the dark ring in the inspection chart. The bubble size information is generated based on the complex distances above and based on the complex distances. The laminated plate-shaped object inspection apparatus according to claim 6, wherein the bubble size information generating means obtains a gradation value profile from the plurality of directions, and obtains between the two dark portions corresponding to the dark ring on the inspection image. The plurality of distances are generated, and the bubble size information is generated based on the complex distances. A method for inspecting a laminated plate-like body is to perform inspection of air bubbles in an adhesive using a laminated plate-shaped inspection device, and the laminated plate-shaped inspection device includes a line sensor camera configured to be configured and configured a plate-shaped body facing member of one of the bonded plate-like members having two light-transmissive plate-like members bonded thereto by the above-mentioned adhesive; and an illumination mechanism from the other of the bonded plate-shaped members a side of the body, facing the line sensor camera illuminator; and a processing unit for processing the line sensor from the line sensor when the line sensor camera scans the laminated plate in a state of being illuminated by the illumination mechanism The image signal outputted by the camera; the laminated plate inspection method has an inspection image information generation step, and the inspection image information generation step is performed by the processing unit according to the image signal from the line sensor camera to generate a pixel unit The inspection image information composed of the gradation value, and the optical conditions of the illumination mechanism and the line sensor camera are adjusted to utilize the pixel unit Concentrated In the inspection image indicated by the inspection image information, the bubble portion is expressed by a dark ring in a bright background, and the laminated plate inspection method further has a bubble size information generating step, and the bubble size information generating step And the processing unit further generates a bubble size profile indicating a size of the bubble according to a distance between the two dark portions corresponding to the dark ring, obtained from the cross-sectional value of the direction in which the dark ring is transversely cut from the inspection image information. Information as a result of the inspection results. The method for inspecting a laminated plate according to claim 9 wherein the bubble size information generating step is obtained from a pixel position corresponding to a lowest value of the two dark portions corresponding to the dark ring of the darkness value profile. The distance is used as the distance between the two dark portions.