TW201307830A - Optical plate detection method, optical plate detection device, and detection method of stacking optical plates - Google Patents

Abstract

The optical plate detection method of this invention comprises the following steps: placing the optical plates on a conveyor. A sensor detects the approaching optical plate to output an electrical signal, and makes an image capturing device to capture a detected image. The detected image covers part region of the optical plate. Next, a monitoring host carries out operation processing on the detected image, and the monitoring host, according to the detected image, determines whether the detected image covers arrow mark. If the detected image does not cover the arrow mark, a warning device is actuated and the conveyor is suspended to re-adjust the optical plate. Since optical plate's arrow mark is printed on a fixed corner and the image processing module can detect the arrow mark, and when the arrow mark is not detected, warning device and conveyor are triggered in order to correct the direction of optical plate, thereby improving the yield rate of the products.

Description

Optical plate detecting method, optical plate detecting device, and stacked optical plate detecting method

The present invention relates to a detecting device and method, and more particularly to an optical plate detecting device and method.

A general liquid crystal display is assembled by stacking a plurality of optical plates, and a polarizing plate is taken as an example, and has a directionality, so that it must conform to a predetermined direction during assembly, so that the light intensity can be correctly controlled, so that the overall display is made. Works normally. In addition, in order to facilitate the identification of the direction of the polarizing plate, the sagittal printing is printed on a specific corner of the polarizing plate.

In the process of manufacturing the polarizing plate, the whole roll of the substrate is first cut to form a sheet-shaped polarizing plate, and the sagittal printing is printed on a specific area of the polarizing plate by inkjet, and then folded in a semi-manual manner. After that, feed it into the machine to edging. Next, the overall condition of the polarizing plate is inspected one by one in a visual manner, and after being stacked, it is sent to the area where the dust collector is installed. At this time, the operator places the polarizing plates one by one on the conveyor belt, and sends the polarizing plate to the dust roller of the dusting machine to remove the dust. After the operator sends the polarizing plate through the roller, the polarizing plates are stacked one on another. Place on the platform and pack in a piece of packaging.

In order to avoid the sacrificial ink dot protrusions and to destroy the quality of the polarizing plate when overlapping, generally the sagittal printing is composed of shallower ink dots, so that the general sagittal printing is less noticeable on the polarizing plate, and the blue sagittal printing is less reddish. Obviously, in addition, the shade of the shade can also affect the degree of obviousness. Since the polarizing plate is repeatedly stacked manually or placed one by one in the manufacturing process, it is easy to occur in the case of offset or reversed, which affects the quality of the shipment. Furthermore, the polarizing plate is folded into a stack and loaded. In the case of a box, if the orientation is wrong, that is, if the orientation of the topmost polarizer is wrong, the stack may be misplaced or reversed, and the entire batch of liquid crystal displays may be assembled incorrectly. The cost is wasted. Therefore, in the production inspection process, the polarizing plate may be misplaced or reversed, which may affect the yield of the polarizing plate.

Accordingly, it is an object of the present invention to provide an optical panel detecting method and apparatus which can efficiently increase yield.

Thus, the optical plate detecting method of the present invention uses an optical plate detecting device to detect and confirm the orientation of the optical plate. Each optical plate is printed with a sagittal print. The optical plate detecting device comprises a conveyor capable of transporting an optical plate, an image capturing device capable of capturing images, a monitoring host electrically connected to the image capturing device, a warning device electrically connected to the monitoring host, and a warning device An inductor that senses the proximity of the optical plate. The optical plate detecting method comprises the steps of: placing the optical plates on the conveyor one by one in a predetermined orientation, the optical plates being driven to move toward the image picker, the predetermined orientation being printed The shaded area is placed in an area that is expected to be covered by the image capture device. One of the optical plates passes through the sensor. At this time, the sensor senses the optical plate to output an electrical signal, and the image capture device is triggered to capture a detected image including a portion of the optical plate. Then, the monitoring host performs arithmetic processing on the detected image, and the monitoring host determines whether the detected image covers the sagittal image according to the detected image, and makes the warning device when determining that the detected image does not include the sagittal image. Actuate and pause the conveyor and adjust the optical plate to the correct orientation. The optical plate that is transported to the end of the conveyor is moved to perform the next stage of the process.

The optical plate detecting device of the present invention is configured to detect a plurality of optical plates one by one, each optical plate is printed with a saddle printing, the optical plate detecting device comprising: a conveyor capable of receiving and conveying the optical plates, one of the An illuminator on one side of the conveyor, an image capture device on one side of the conveyor, a monitoring host electrically coupled to the image capture device, and at least one alerter electrically coupled to the monitoring host. The image capture device captures an image of one of the optical plates. The illuminator emits light towards the conveyor. The monitoring host can detect the sagittal image by using the image captured by the image capturing device, and can electrically trigger the conveyor to pause and trigger the warning device to act.

A method for detecting stacked optical sheets, wherein an optical plate detecting device is used to detect a plurality of stacked optical plate placement directions, each of the optical plates is printed with a sagittal print, and the stacked optical plate detecting device includes a stack of the optical plates a platform, an image capture device above the platform and capable of capturing images, a illuminator positioned above the platform and illuminating, a monitoring host electrically connected to the image capture device, and an electrical connection The monitoring device of the monitoring host, the optical plate detecting method comprising the steps of: placing a plurality of stacked optical plates on the platform in a predetermined square position, wherein the predetermined orientation is to place the printed area The area that the image picker can cover when capturing images. The illuminator emits light toward the uppermost optical plate, and causes the image picker to capture a detected image including a portion of the uppermost portion of the optical plate. Then, the monitoring host performs arithmetic processing on the detected image, and determines whether the detected image covers the sagittal image according to the detected image. When it is determined that the detected image does not include a sagittal print, the alerter operates and adjusts the orientation of the optical plates. Next, the optical plates are packaged.

The utility model has the beneficial effects that: since the image printing of the optical plate is printed on a fixed corner, the image capturing device can intercept the image of the optical plate and perform operations through the image processing module to detect the sagittal printing, and When the sagittal print is not detected, the alert is activated, and the conveyor is paused for correcting the orientation of the optical plate to achieve the purpose of improving the yield of the product.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of FIG.

Referring to Figures 1 and 2, a first preferred embodiment of the optical plate detecting method of the present invention utilizes an optical plate detecting device 1 to detect the orientation of a plurality of optical plates 91 one by one. Each of the optical plates 91, 91', 91" is printed with a sagittal 911 for identification, which is printed on a corner of the optical plates 91, 91', 91".

It should be noted that, in the case where the optical plates 91 are all in the correct orientation, and in a plan view, as shown in FIG. 1A, the sagittal 911s are located in the same area, that is, the sagitta 911 appears in the same corner. . When there are several misalignments in the optical plates 91, 91', as shown in FIG. 1B, the misplaced optical plates 91', the positions where the sagittal 911 appears, are the correct orientations of the optics. Plate 91 Sagittarius 911 appears in different corners. In the case where there are several reversed of the optical plates 91, 91", that is, the optical plate 91" is overturned, as shown in FIG. 1C, the inverted optical plates 91" are in the position where the sagittal 911 appears. It is at a different corner from the correct optical plate 91. In other words, when the optical plates 91', 91" are reversed or misplaced, the position of the sagittal 911 is different from the optical plate having the correct orientation, and the present invention is Use this feature to detect.

Referring to Figures 2, 3 and 4, the optical plate detecting device 1 comprises: a conveyor 10, an illuminator 20, an image capturing device 30 for capturing images, and a monitoring host electrically connected to the image capturing device 30. 40. An alerter 50 electrically connected to the monitoring host 40, and an inductor 60 electrically connected to the monitoring host 40.

The conveyor 10 can receive the optical plates 91, 91' and drive the optical plates 91, 91' to move. The conveyor 10 includes a conveyor belt 11 that carries the optical plates 91, 91', and a control switch 12 that electrically connects the conveyor belt 11. The control switch 12 can control the stop and start of the conveyor belt 11 and can be switched by electric trigger. In the preferred embodiment, the control switch 12 can be touched by the electric signal to control the conveyor belt 11 to be suspended. The conveyor belt 11 of the preferred embodiment is a plurality of belts spaced parallel to each other, and the optical plates 91, 91' can be fed into the dirt roller.

The illuminator 20 of the present embodiment is positioned below the conveyor belt 11 and can emit light toward the conveyor belt 11. It should be noted that the illuminator 20 is preferably provided with a uniform planar light source. In the preferred embodiment, a backlight module is employed. The image picker 30 and the illuminator 20 are located on opposite sides of the upper and lower sides of the conveyor belt 11, and the image picker 30 includes a lens 31 facing the conveyor belt 11, and one can capture the lens 31 The light image is converted into a photosensitive member 32 of the electrical signal. Since the optical plate 91 can transmit light, and the conveyor belt 11 is a belt that is spaced apart, the light emitted by the illuminator 20 can pass through the gap of the conveyor belt 11 and pass through one of the optical plates 91, 91'. Arrived at lens 31.

The sensor 60 is mounted on one side of the image picker 30 and electrically connected to the monitoring host 40, and can sense the optical plates 91, 91'. The sensor 60 can send a signal to the monitoring host 40 when it senses that one of the optical plates 91, 91' passes, to drive the image capturing device 30 to capture an image. In the preferred embodiment, the inductor 60 is composed of a transmitter and a reflector, and the transmitter and the reflector are mounted on opposite sides of the conveyor 10, respectively.

The alerter 50 includes a buzzer 51 that can be audibly activated by the monitoring host 40, and a prompt 52 that can be illuminated by the monitoring host 40.

The monitoring host 40 includes a storage unit 41 for storing digital data, an image processing module 42 electrically connected to the storage unit 41, a trigger module 43 electrically connected to the image processing module 42, and an electrical connection of the image. The camera trigger module 45 of the skimmer 30. The camera trigger module 45 can be triggered by the signal transmitted by the sensor 60, and the image sensor 30 is driven to capture the image by the output signal. The storage member 41 can store the image data captured by the image capturing device 30. The image processing module 42 performs arithmetic processing and determination based on the image data stored in the storage member 41. The image processing module 42 has an image contrast enhancement unit 421, a blur diffusion unit 422, a binarization unit 425, an image padding unit 423, and a sagittal determination unit 424 connected to the image padding unit 423.

The image contrast enhancement unit 421 operates on the image to highlight the edge of the image in the image. In the preferred embodiment, the image contrast enhancement unit 421 utilizes Sobel Filter and Laplace. A Laplacian Filter is implemented to highlight and capture partial images in the image.

The blur diffusion unit 422 averages the gray scales in the image to increase the image area, that is, connects the ink dots to form a complete image to increase the accuracy of the judgment. In the preferred embodiment, the blur diffusion unit 422 is implemented by using a Gaussian filter and a Median operation.

The binarization unit 425 compares the gray scale of each pixel in the image with a threshold value, and then divides it into two, and fills in the effective gray scale or the invalid gray scale, that is, further adjusts the detected image. For black and white images.

The image padding unit 423 fills in the effective gray scale in the closed area of the image in the image. The sagittal determination unit 424 calculates the size of each image in the image based on the range of the effective gray scale, and further determines whether it is a valid image. In the preferred embodiment, the sagittal determination unit 424 calculates the length, width and area of each image separately, compares it with the preset standard range, and retains only the image conforming to the standard. In addition, the sagittal determination unit 424 further calculates the number of images in the image to determine the presence of the sagittal 911, in other words, in the image, when there is an image of a size conforming to the standard, that is, the sagittal 911 is judged to exist. The trigger module 43 can issue a trigger signal when the sagittal 911 is absent to activate the control switch 12 and the alarm 50 to suspend the conveyor belt 11 and activate the buzzer 51 and the prompting member 52.

It should be noted that, in the preferred embodiment, the image processing module 42 is constructed using N2 Vision National Instruments.

Referring to Figures 2, 3, 4, and 5, the optical panel detecting method includes the following steps:

Step 93: The optical plates 91, 91' are placed on the conveyor 10 one by one in a predetermined orientation, so that the optical plates 91, 91' are respectively driven by the conveyor belt 11 toward the image. The lens 31 of the picker 30 moves. When the predetermined orientation is the placement of the optical plates 91, 91', the optical plates 91, 91' are intended to cover the area of the sagittal 911, which can be captured by the image capture device 30.

It should be noted that when the optical plates 91, 91' are placed on the conveyor belt 11, the sagittal 911 thereon is placed at the gap of the conveyor belt 11, that is, the light of the illuminator 20 passes through the conveyor. After having 11 gaps, it passes through one of the optical plates 91, 91' to reach the lens 31.

Step 94: When the sensor 60 senses that one of the optical plates 91, 91' passes, the electrical signal is output to the monitoring host 10, and the imaging trigger module 45 is triggered to activate the image capturing device 30. At this time, the image capturing device 30 captures a detected image, and the detected image includes a partial region of the optical plates 91, 91'.

It should be noted that the image capturing device 30 can capture images of a partial area of the optical plates 91, 91'. In the preferred embodiment, the sagittal 911 is located on the right front side of the optical plate 91 because it is placed correctly. In the position of the corner, the image capturing device 30 must capture the image of the area. Therefore, in order to capture the effective area of the optical board 91, the monitoring host 40 can receive the signal of the sensor 60 according to the conveyor belt 11 The speed of the adjustment triggers the time at which the image capture device 30 is actuated.

Step 95: The image contrast enhancement unit 421 of the image processing module 42 performs an arithmetic processing according to the detected image to highlight the image boundary. Further, the blur diffusion unit 422 averages the gray scale of the pixels in the image. And outwardly diffusing to enlarge the area of the color point in the detected image. The binarization unit 425 compares the gray scale of each pixel in the detected image with a threshold value, and fills in the effective gray scale or the invalid gray scale, that is, converts the detected image into a black and white image. Then, the image padding unit 423 fills the pixels in the closed region of the detected image into an effective grayscale, and uses the range of the effective grayscale to calculate the length, width, and area of each image in the image, and then The predetermined range is compared, and only the image whose size conforms to the standard in the image is retained, that is, the image whose size does not match is removed.

In the preferred embodiment, in the case where the sagittal color is red, the binarization unit 425 is determined based on the "gray scale 40" standard, and in the case where the sagittal color is blue, the binarization unit The 425 is based on the "Grayscale 25" standard, but can be adjusted according to the site conditions.

Next, step 96 is performed: calculating the number of images in the image, that is, calculating the number of images whose size conforms to the standard, to determine whether the sagittal 911 exists. When the number of images is greater than or equal to 1, the sagittal determination unit 424 determines that the sagittal 911 is present. On the other hand, when the number of images is less than 1, it is determined that the sagittal 911 does not exist, and at the same time, the trigger module 43 is triggered to activate the trigger 50, and the control switch 12 is triggered to suspend the conveyor belt 11, that is, the length of the image. When the width and the area do not meet the standard, the triggering device 50 is activated, and the conveyor belt 11 is triggered to pause, and then the optical plate 91 is adjusted to the correct orientation. This embodiment is manually adjusted by the operator.

Further, since the optical plates 91 are in a fixed position, the sagittal 911 is located at a fixed position, and may be included in the detected image, and when the optical plate 91' is misplaced or reversed, The optical plate 91' is placed in the wrong direction. At this time, the sagittal 911 of the optical plate 91' is located at a corner different from the correct position, so that the sagittal 911 cannot be included in the detected image, and the present invention utilizes this feature. It is determined whether the direction in which the optical plates 91, 91' are placed is correct, and the image processing module 42 is used for identification.

Step 97 is executed: the conveyor belt 11 feeds the optical plates 91, 91' to the sticky roller.

The image capture device 30 is used to capture an image of a specific area on the optical plate 91, that is, an area where the sagittal 911 is placed when the position is correct, and the image processing module 42 automatically determines the sagittal 911 through the image processing module 42. When there is no sagittal 911 in the image, the warning device 50 is activated and the conveyor belt 11 is suspended for correction, so that the yield of the product can be efficiently improved.

It should be noted that the image processing module 42 analyzes and judges the image by using a digital image processing technology, and the flow of the calculation and the algorithm used are not limited to the embodiment, for example, the environment is complicated. In the case of light and shadow interference, or severe image noise, it is also possible to introduce functions such as suppressing noise, increasing contrast or blur comparison, that is, adjusting with environmental changes to increase the accuracy of judgment.

Referring to FIG. 6, a second preferred embodiment of the optical plate detecting method of the present invention is used to detect the principle and flow of the optical plate 91, which is the same as the first preferred embodiment, and the optical plate of the preferred embodiment. The detecting device 1 is similar to the first preferred embodiment, and includes: a conveyor 10, an illuminator 20, an image capturing device 30 capable of capturing images, and a monitoring host electrically connected to the image capturing device 30. 40. An alerter 50 electrically connected to the monitoring host 40, and an inductor 60 electrically connected to the monitoring host 40.

The difference between the optical plate detecting device 1 of the present embodiment and the first preferred embodiment is that the illuminator 20 of the embodiment is located above the conveyor 10 and is located at the image capturing device 30. The light emitted by the illuminator 20 is reflected by the optical plate 91, and the image capturing device 30 captures a detected image, so that the light source can be provided, so that the image capturing device 30 can be smoothly performed. The ground image captures the detected image of the optical plate 91.

Referring to Figures 7, 8, and 9, a preferred embodiment of the method for detecting stacked optical sheets of the present invention utilizes an optical panel detecting device 1 to detect the orientation of a plurality of stacked optical sheets 91. The optical plate detecting device 1 includes a platform 70 for stacking the optical plates 91, an image capturing device 30 above the platform 70 and capable of capturing images, and a lighter position above the platform 70. The illuminator 20, a monitoring host 40 electrically connected to the image capturing device 30, and a warning device 50 electrically connected to the monitoring host 40. The monitoring host 40 includes a storage unit 41 for storing digital data, an image processing module 42 electrically connected to the storage unit 41, a trigger module 43 electrically connected to the image processing module 42, and a photography trigger module 45. And a manual switch 46 electrically connected to the photographic trigger module 45.

The monitoring host 40 of the present embodiment is the same as the first preferred embodiment, and has an image contrast enhancing unit 421, a blur diffusing unit 422, a binarization unit 425, an image filling unit 423, and a signal connection. The sagittal determination unit 424 of the image padding unit 423.

The method of detecting the stacked optical sheets is the same as that of the first preferred embodiment, and the orientation of the optical plate 91 is determined by using a sagittal print (not shown). It is to be noted that the purpose of the method for detecting stacked optical sheets of the present invention is to confirm that the stacked optical sheets 91 are placed in the correct orientation before the optical sheets 91 are packaged in a plurality of layers.

The identification and judgment principle of the method for detecting stacked optical sheets of this embodiment is the same as that of the first preferred embodiment, and includes the following steps:

Step 81: A plurality of optical plates 91 are stacked on the platform 70 in a predetermined orientation, where the predetermined orientation is such that the image-printed area is placed in an area that can be covered by the image capturing device 30 when capturing images. .

Step 82: The illuminator 20 emits light toward the uppermost optical plate 91, and causes the image capturing device 30 to capture a detected image including a portion of the uppermost optical plate 91. In the preferred embodiment, the operator manually switches the manual switch 46 to activate the camera trigger module 45, thereby causing the image capture device 30 to capture images.

Step 83 is executed: the monitoring host 40 performs arithmetic processing on the detected image. The image contrast enhancement unit 421 performs arithmetic processing according to the detected image, so that the value of the low gray scale is smaller and the value of the high gray scale is larger, that is, the distance between the high gray scale and the low gray scale is increased, and Make image boundaries stand out.

Furthermore, the blur diffusion unit 422 performs an operation process on the detected image to expand the image and reduce the gray scale contrast. In this embodiment, the color points are connected to increase the number of color points, and then the average value and the Gaussian blur are used. The method blurs the image contrast and removes pixels with too low gray levels.

Then, the binarization unit 425 compares the gray scale of each pixel in the detected image with a threshold value, and fills in the effective gray scale or the invalid gray scale, that is, converts the detected image into a black and white image. It should be noted that the threshold is the average of the gray scales in a specific range in the image, and the image is binarized by using the threshold, that is, the Niblack local thresholding algorithm is used.

Then, the image filling unit 423 clears the image connected to the edge of the image, and fills the gap of the image in the detected image, that is, fills in the effective gray scale, and then calculates the length, width and area of the image, and clears Images that are not up to standard in length, width, and area.

It should be noted that the flow of the operation of the image processing module 42 and the algorithm used are not limited to the embodiment, and may be related to the environment when the environment is complicated and the light and shadow interferes, or the image noise is serious. The changes are adjusted to increase the accuracy of the judgment.

Step 84: The detecting host 40 determines, according to the detected image, whether the detected image covers a sagittal image (not shown), that is, calculates the number of images in the image, and when the number of images is greater than or equal to 1, It is determined that the detected image includes a sagittal print. When the number of images is less than 1, it is judged that the sagittal print does not exist, and the alerter 50 is activated, and the optical plates 91 are adjusted to the correct orientation.

Step 85 is performed: the stacked optical plates 91 are packaged.

In this embodiment, the digital image processing technology is also used to calculate the detected image of the stacked optical plate 91, and determine whether there is a sagittal presence, so that the optical plate 91 can be packaged in the correct orientation to improve the product yield, and When assembling the liquid crystal display, it is possible to avoid the normal operation of the optical plate 91 due to the orientation error, thereby further reducing the situation of re-disassembly and reducing the production cost.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Optical plate detecting device

10. . . Conveyor

11. . . conveyor

12. . . Control switch

20. . . Illuminator

30. . . Image capture device

31. . . Lens

32. . . Photosensitive member

40. . . Monitoring host

41. . . Storage

42. . . Image processing module

421. . . Image contrast enhancement unit

422. . . Fuzzy diffusion unit

423. . . Image filling unit

424. . . Sagittal judgment unit

425. . . Binarization unit

43. . . Trigger module

45. . . Photography trigger module

46. . . Manual switch

50. . . Warning device

51. . . Buzzer

52. . . Prompt

60. . . sensor

91. . . Optical board

91’. . . Optical board

91"...optical plate

911. . . Sagittal

70. . . platform

81~85. . . step

93~97. . . step

1A is a perspective view showing a state in which a plurality of optical plates are stacked in a first preferred embodiment of the optical plate detecting method of the present invention, and the optical plates are in a state in which the orientation is correct;

1B is a perspective view showing a state in which a plurality of optical sheets are stacked, and a plurality of the optical sheets are in a staggered state;

1C is a perspective view showing a state in which a plurality of optical sheets are stacked, and a plurality of the optical sheets are in an inverted state;

Figure 2 is a side elevational view, mainly showing an optical plate detecting device of the first preferred embodiment;

Figure 3 is a top plan view, mainly showing the optical plate detecting device of the first preferred embodiment;

Figure 4 is a functional block diagram showing mainly the optical plate detecting device of the first preferred embodiment;

Figure 5 is a flow chart mainly showing the execution steps of the first preferred embodiment;

Figure 6 is a side elevational view showing an optical sheet detecting device of a second preferred embodiment of the optical sheet detecting method of the present invention;

Figure 7 is a side elevational view, mainly showing an optical plate detecting device of a preferred embodiment of the method for detecting stacked optical sheets of the present invention;

Figure 8 is a functional block diagram showing the preferred embodiment; and

Figure 9 is a flow chart mainly showing the execution steps of the preferred embodiment.

1. . . Optical plate detecting device

10. . . Conveyor

11. . . conveyor

12. . . Control switch

20. . . Illuminator

30. . . Image capture device

31. . . Lens

32. . . Photosensitive member

40. . . Monitoring host

50. . . Warning device

51. . . Buzzer

52. . . Prompt

60. . . sensor

91. . . Optical board

Claims (9)

An optical plate detecting method uses an optical plate detecting device to detect and confirm an orientation of an optical plate, and each optical plate is printed with a sagittal print, the optical plate detecting device includes a transporter capable of transporting the optical plate, and a pick-up An image capturing device of the image, a monitoring host electrically connected to the image capturing device, a warning device electrically connected to the monitoring host, and a sensor capable of sensing the proximity of the optical plate, the optical plate detecting method comprises the following steps: A) placing the optical plates one by one on the conveyor belt in a predetermined orientation, the optical plates being driven to move toward the image picker, the predetermined orientation being such that the printed area is placed on the forecast An area that can be covered by the image capture device; (B) one of the optical plates is in proximity to the sensor, the sensor senses the optical plate to output an electrical signal, and causes the image capture device to be triggered, and Extracting a detected image including a portion of the optical plate; (C) the monitoring host performs arithmetic processing on the detected image; (D) the monitoring host determines, according to the detected image, whether the detected image contains Sagitating, when determining that the detected image does not include a sagittal print, causing the alerter to actuate, suspending the conveyor, and then adjusting the optical plate to the correct orientation; and (E) moving the optical plate that is transported to the end of the conveyor To perform the next phase of the process. According to the optical plate detecting method of claim 1, the monitoring host includes an image processing module, and in step (C), the image processing module of the monitoring host performs arithmetic processing on the detected image to Highlight the image in the detected image. According to the optical plate detecting method of claim 2, in the step (D), the image processing module of the monitoring host calculates the size of the image in the detected image, and counts the size in a standard. The number of images in the range to determine the presence of the image in the detected image. According to the optical plate detecting method of claim 3, in the step (C), after the image processing module highlights the boundary of the image in the detected image, the image in the detected image is The gray scale of the prime is compared with a critical value and then divided into two, and the effective gray scale or the invalid gray scale is filled in respectively, and then the effective gray scale is filled in the closed region of the image. In step (D), the image processing is performed. The module calculates the image size based on the pixels of the effective gray level. An optical plate detecting device for detecting a plurality of optical plates one by one, each optical plate is printed with a sagittal printing device, the optical plate detecting device comprising: a conveyor for receiving and conveying the optical plates; a illuminator, a bit On one side of the conveyor, and emitting light to the conveyor; an image picker, located on one side of the conveyor, and capturing an image of one of the optical plates; a monitoring host electrically connected to the An image capture device, wherein the image captured by the image capture device is used to detect the image, and the conveyor is automatically triggered to be paused; and at least one alarm is electrically connected to the monitoring host and can be triggered by the monitoring host And act. The optical plate detecting device of claim 5, further comprising an inductor mounted on a side of the conveyor that senses the optical plate and electrically triggers the monitoring host to drive the image picker. The optical sheet detecting device according to claim 5, wherein the image picker and the illuminator are located on the same side of the conveyor, and the image picker includes a conveyor facing the conveyor. a lens, and a photosensitive member capable of converting light into an electrical signal, the monitoring host includes a storage member for storing image data generated by the photosensitive member, and an electrical connection connecting the storage member and performing calculation based on the data stored in the storage member An image processing module, and a trigger module electrically connected to the image processing module and capable of outputting a trigger signal, the image processing module having an image contrast enhancement unit capable of highlighting an image in the image, and an electrical connection The trigger module can determine the sagittal determination unit that touches the trigger module. The optical plate detecting device according to claim 5 or 6, wherein the image capturing device and the illuminator are respectively located on opposite sides of the upper and lower sides of the conveyor, and the image capturing device includes a facing a lens of the conveyor belt, and a photosensitive member capable of converting light into an electric signal, the monitoring host includes a storage member for storing image data generated by the photosensitive member, and a material electrically connected to the storage member and stored according to the storage member An image processing module for performing operation judgment, and a trigger module electrically connected to the image processing module and capable of outputting a trigger signal, the image processing module having an image contrast enhancement unit capable of highlighting an image in the image, and a The trigger module is electrically connected and can determine a sagittal determination unit that touches the trigger module. A method for detecting stacked optical plates, wherein an optical plate detecting device is used to detect the orientation of a plurality of stacked optical plates, each of which is printed with a sagittal print, the optical plate detecting device comprising a stack of optical plates a platform, an image capture device above the platform and capable of capturing images, a illuminator positioned above the platform and illuminating, a monitoring host electrically connected to the image capture device, and an electrical connection The monitoring host monitor, the stacked optical panel detecting method comprises the following steps: (A) placing a plurality of stacked optical sheets on the platform in a predetermined position, the predetermined orientation being printed on the platform The area is placed in an area that the image capture device can cover when capturing the image; (B) the illuminator emits light toward the uppermost optical plate, and the image picker captures the uppermost portion of the optical plate (C) the monitoring host performs an operation process on the detected image to highlight the image in the detected image; (D) the detecting host determines whether the detected image is based on the detected image Covering the seal, in judging the detective When the image is not printed encompasses vectors, such that the warning device actuated such readjustment of the optical plate to the correct orientation; and (E) of the optical package of the stacked plates.