KR101957448B1 - Apparatus for counting polarizing sheet and method of counting polarizing sheet - Google Patents

Abstract

According to an embodiment of the present invention, provided are a polarizing sheet counting apparatus, which can accurately check the number of stacked polarizing sheets, and a polarizing sheet counting method. The polarizing sheet counting apparatus counts the number of polarizing sheets having a polarizing film and a protection film attached to both sides of the polarizing film and includes an irradiation unit, a light receiving unit, and a counting unit. The irradiation unit irradiates light to one side of polarizing sheets in which a plurality of the polarizing sheets are stacked. The light receiving unit receives light emitted after guiding the light of the polarizing sheet on the other side of the polarizing sheet. The counting unit obtains an image represented by the luminance due to the light guiding difference of the polarizing film and the protection film based on the light received from the light receiving unit, and checks the number of the polarizing sheets by counting the number of the polarizing films in the image.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing sheet counting apparatus and a polarizing sheet counting method,

The present invention relates to a polarizing sheet counting apparatus and a polarizing sheet counting method, and more particularly to a polarizing sheet counting apparatus and a polarizing sheet counting method capable of accurately grasping the number of laminated polarizing sheets.

Background Art Polarizing films are widely used in various optical display devices such as a liquid crystal display (LCD), an electroluminescence (EL) display, a plasma display (PDP), and a field emission display (FED). Generally, the polarizing film is adhered to each surface of the liquid crystal cell in the process of forming the liquid crystal panel of the liquid crystal display device.

For this bonding, an adhesive layer is usually provided on one surface of the polarizing film, and the adhesive layer is covered with a release film so as not to be contaminated by exposure until it is bonded to the liquid crystal cell. A protective film for preventing scratches and contamination is attached to the opposite surface of the polarizing film. Normally, the polarizing film is produced in the form of a sheet and is cut and used in a required size.

In general, a polarizing sheet is moved in a stacked state for convenience. In the past, the number of stacked polarizing sheets is counted by the operator one by one, so that it takes a long time to grasp the number. Further, since the polarizing sheet is thin, even if a plurality of polarizing sheets are attached, the operator can count them in one sheet, and it is difficult to grasp the exact number.

On the other hand, in order to distinguish between bundles of polarizing sheets in the process of laminating the polarizing sheets, a separator is also used. However, in this case, too, there is a problem that the worker must count one by one in order to determine whether the bundles of polarizing sheets discriminated by the kanji are distinguished by the correct number.

Korean Patent Laid-Open Publication No. 2017-0061211 (published on June 27, 2015)

SUMMARY OF THE INVENTION The present invention provides a polarizing sheet counting apparatus and a polarizing sheet counting method capable of precisely grasping the number of stacked polarizing sheets.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a polarizing sheet counting apparatus for counting the number of polarizing sheets including a polarizing film and a protective film attached to both sides of the polarizing film, An irradiation unit for irradiating light to one side of the polarizing sheet; A light receiving unit that receives light emitted after the polarizing sheet is guided from the other side of the polarizing sheet; And obtaining an image represented by luminance due to the light guide difference of the polarizing film and the protective film based on the light received by the light receiving section, counting the number of the polarizing films in the image, A polarizing sheet counting unit including a counting unit for counting the number of sheets to be counted.

In an embodiment of the present invention, the counting unit may include an image obtaining unit that obtains a first image using light emitted from the stacked polarizing sheet, A division section for separating a polarizing film line having a first luminance range and a polarizing film line having a second luminance range lower than the first luminance range; And may have a counting unit for counting the number of sheets.

In the embodiment of the present invention, when a plurality of luminance regions having different luminance are present on a first continuous line, the division unit may divide a region having a luminance belonging to the first luminance region among the plurality of luminance regions The first line is divided into the protective film lines when the first luminance is larger than the luminance of the second luminance range, and a region of the plurality of luminance regions having the luminance belonging to the second luminance range is divided into the first luminance The first line can be divided into the polarizing film lines.

In an embodiment of the present invention, when the thickness of a second continuous line exceeds a predetermined thickness of the polarizing film line and the thickness of the protective film line, the separating unit may divide the second line into kanji .

In the embodiment of the present invention, the division unit may divide the protective film line and the polarizing film line for each of the plurality of partial images obtained from the first image, and the counting unit may divide the polarizing film line, It is possible to grasp the number of the polarizing sheets stacked on the average value of the sum of the number of the film lines.

In the embodiment of the present invention, a table portion for rotating the polarizing sheet in which the laminated polarizing sheet is placed and laminated so that the light irradiated from the irradiating portion is incident on each corner of the laminated polarizing sheet to be emitted .

In an embodiment of the present invention, the partial image may be an edge image of the laminated polarizing sheet.

In the embodiment of the present invention, the light irradiated from the irradiating unit may be incident on the incident surface of the polarizing sheet facing the edge of the laminated polarizing sheet, and may be obliquely emitted from the emitting surface of the polarizing sheet.

In the embodiment of the present invention, the table portion may be rotated together with the polarizing sheet laminated in the fixed state, or may be rotated together with the laminated polarizing sheet.

In an exemplary embodiment of the present invention, a reflection unit reflects light emitted from the irradiation unit to change a path of the light; A housing portion in which the irradiation portion, the reflection portion, and the light receiving portion are installed; And a moving unit reciprocating the housing unit in a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction.

According to another aspect of the present invention, there is provided a polarizing sheet counting method for counting the number of polarizing sheets including a polarizing film and a protective film attached to both sides of the polarizing film, An incident step of causing light to be incident on one side of the polarizing sheet; A light receiving step of receiving light emitted after the polarizing sheet is guided from the other side of the polarizing sheet; And obtaining an image represented by brightness due to a light guide difference of the polarizing film and the protective film on the basis of the received light, counting the number of the polarizing films in the image to grasp the number of the polarizing sheets A method of polarizing sheet counting comprising the step of counting.

In the embodiment of the present invention, the counting step includes an image acquiring step of acquiring a first image using light emitted from the laminated polarizing sheet, and a step of irradiating the protective film with light A polarizing film line having a first brightness range and a second polarizing film line having a second brightness range lower than the first brightness range, the method comprising the steps of: counting the number of the polarizing film lines; And a counting step of counting the number of polarizing sheets.

In the embodiment of the present invention, in the case where a plurality of luminance regions having different luminance are present on a first continuous line in the division step, the luminance belonging to the first luminance range among the plurality of luminance regions is The first line is divided into the protective film lines if the area of the first film is wider than the area having the brightness belonging to the second luminance range, and the area of the second film having the luminance belonging to the second luminance range 1 < / RTI > luminance range, the first line can be divided into the polarizing film lines.

In the embodiment of the present invention, when the thickness of the second continuous line exceeds the predetermined thickness of the polarizing film line and the thickness of the protective film line, the second line is divided into kanji .

In the embodiment of the present invention, in the division step, the protective film line and the polarizing film line are divided for each of a plurality of partial images obtained from the first image, and the counting step counts The number of the polarizing sheets laminated on the average value of the sum of the number of the polarizing film lines.

In the embodiment of the present invention, the light received in the light receiving step is light incident on each corner of the laminated polarizing sheet, and the partial image may be each corner image of the laminated polarizing sheet.

In the embodiment of the present invention, in the incidence step, the light is incident on the edge of the laminated polarizing sheet, and enters the incidence surface of the polarizing sheet obliquely, and the light emitted after the light- And can be outputted obliquely to the exit surface of the sheet.

According to the embodiment of the present invention, since the number of polarizing films can be counted by using the luminance difference caused by the light guiding difference, it is possible to grasp the correct number even in the state where the polarizing sheet is laminated.

Further, according to the embodiment of the present invention, a sufficient amount of light can be secured by directing the light toward the edge of the polarizing sheet in which the light is stacked, and incidence of the light entering the incidence surface of the polarizing sheet obliquely and obliquely to the exit surface of the polarizing sheet As a result, the difference in luminance between the polarizing film line and the protective film line can be further clarified, and the number of the polarizing film can be grasped accurately.

Further, according to the embodiment of the present invention, since a plurality of partial images are obtained and the number of polarizing sheets laminated on the average value of the sum of the number of polarizing film lines counted in each partial image can be grasped, Even if there is pollution, exact number can be grasped.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be deduced from the description of the invention or the composition of the invention set forth in the claims.

1 is a plan view of a polarizing sheet counter according to a first embodiment of the present invention.
2 is a plan view illustrating an operation example of the polarizing sheet counter according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating an example in which light is incident on a polarizing sheet in the polarizing sheet counter according to the first embodiment of the present invention.
Figs. 4 to 6 are diagrams for explaining the counting unit of the polarizing sheet counting apparatus according to the first embodiment of the present invention. Fig.
7 is a photograph showing an image photographed by the polarizing sheet counting apparatus according to the first embodiment of the present invention.
8 is an exemplary view showing a polarizing sheet counting apparatus according to a second embodiment of the present invention.
9 is a flowchart showing a polarizing sheet counting method according to the first embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as " comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of a polarizing sheet counter according to a first embodiment of the present invention, and FIGS. 2 and 3 are plan views illustrating an operation example of a polarizing sheet counter according to a first embodiment of the present invention. And FIG. 4 is a view illustrating an example in which light is incident on the polarizing sheet in the polarizing sheet counter according to the first embodiment of the present invention, and FIGS. 5 to 7 are views showing polarizing sheet coefficients according to the first embodiment of the present invention 8 is a photograph showing an image photographed by the polarizing sheet counting apparatus according to the first embodiment of the present invention.

1 to 7, the polarizing sheet counting apparatus may include an irradiating unit 100, a light receiving unit 300, and a counting unit 400.

The irradiation unit 100 can irradiate the light L1.

The light receiving unit 300 can receive light emitted from the irradiation unit 100 and incident on the polarizing sheet 10 and emitted after light is received.

The polarizing sheet counted by the polarizing sheet counting device may be a polarizing film and a form in which a protective film is attached to both sides of the polarizing film. For example, the polarizing sheet 10 may have a polarizing film 11 and protective films 12 and 13 attached to both sides of the polarizing film 11. The polarizing film 11 may be formed by stretching a polyvinyl alcohol (PVA) based resin. The protective film 12 attached to one side of the polarizing film 11 may be a release film and the protective film 13 attached to the other side of the polarizing film 11 may be a TAC -Acetyl Cellulose) film. However, the polarizing film 11 and the protective films 12 and 13 are not necessarily limited to these types and shapes, and the protective film 12 adhered to one surface of the polarizing film 11 may be a tri- Acetyl Cellulose) film, and the protective film 13 attached to the other surface of the polarizing film 11 may be a release film.

The light L1 irradiated from the irradiation unit 100 and incident on the polarizing sheet 10 is emitted through the polarizing film 11 and the protective films 12 and 13. In the polarizing sheet 10, The amount of the light L2 to be transmitted and transmitted may be large in the protective films 12 and 13. That is, the light transmission amount may be different due to the light guiding difference between the polarizing film 11 and the protective films 12 and 13. [

The counting unit 400 can acquire an image due to the light guiding difference of the polarizing film 11 and the protective films 12 and 13 on the basis of the light received by the light receiving unit 300. [ The image thus obtained can be expressed to have the luminance attributable to the light guiding difference. In other words, the protective films 12 and 13 can be expressed relatively bright because the light L2 is transmitted well and the amount of light is large and scattered, and the polarizing film 11 does not transmit light well, It can be expressed relatively dark.

The counting unit 400 can count the number of polarizing films in the thus obtained image, and thereby, the number of polarizing sheets can be grasped.

Specifically, the counting unit 400 may have an image obtaining unit 410, a dividing unit 420, and a counting unit 430.

The image acquiring unit 410 may acquire the first image using the light emitted from the stacked polarizing sheet 10. The first image may be an image photographed over the entire height of the laminated polarizing sheet 10. That is, the first image may be an image in which both the polarizing sheet on the lowermost side and the polarizing sheet on the uppermost side in the laminated polarizing sheet 10 are photographed.

The classifying unit 420 can distinguish the protective film line F1 and the polarizing film line F2 from the obtained first image 310. [

Here, the protective film line F1 may have a first luminance range. Since the protective films 12 and 13 scatter light while transmitting light, they can have a relatively high luminance.

The polarizing film line F2 may have a second luminance range, and the second luminance range may have a lower luminance than the first luminance range. Therefore, the polarizing film line F2 may appear blacker than the protective film line F1. The division unit 420 can count the number of polarizing films by counting the number of polarizing film lines F2 in the second luminance range lower than the first luminance range and can also grasp the number of polarizing sheets .

In addition, the classifying unit 420 may acquire a plurality of partial images 320 from the first image. The partial image 320 may be selected from any of the first images and may be selected to include the entire height of the laminated polarizing sheet.

In the obtained first image, the polarizing film line F2 corresponding to the polarizing film and the protective film line F1 corresponding to the protective film may appear in a straight line form. Similarly, in the partial image 320, (F2) and the protective film line (F1) may appear in the form of a straight line.

On the other hand, when foreign matter such as dust adheres to the side surface of the laminated polarizing sheet, the polarizing film line F2 or the protective film line F1 do not have the same luminance on a single continuous line, It may happen that the light source has different luminance. For example, at least a portion of the darkened polarizing film line may be brightly expressed (see F2a in FIG. 7). Alternatively, at least a part of the line of the protective film that is brightly expressed may be darkened.

The division unit 420 can identify the widest luminance region on any of the first lines when there are a plurality of luminance regions having different luminance on a continuous first line.

If the region having the brightness belonging to the first brightness range among the plurality of brightness regions is wider than the region having the brightness belonging to the second brightness range, the segmenting unit 420 can divide the first line into the protective film lines. If the region having the luminance belonging to the second luminance range among the plurality of luminance regions is wider than the region having the luminance belonging to the first luminance range, the segmenting unit 420 can divide the first line into the polarizing film lines. In other words, if the luminance of the luminance area having the largest area identified is in the first luminance range, the first line can be divided into the protection film line F1, and the luminance of the luminance area having the largest identified area is 2 luminance range, the first line can be divided into the polarizing film line F2.

For example, as shown in FIG. 5, on a first line, the area of the third luminance area A3 having the luminance falling within the second luminance range is larger than the area of the fourth luminance area A4 , The division unit 420 can divide the second line into the polarizing film lines F2.

On the other hand, when the area of the second luminance area A2 having the first luminance is wider than the area of the first luminance area A1 having the second luminance on the other first line, The first line may be divided into the protective film line F1 in spite of the polarizing film line. In this case, a method for accurately detecting the number of polarizing films is as follows.

The division unit 420 can divide the protective film line and the polarizing film line into the plurality of partial images 320 by the above-described method.

The counting unit 430 counts the number of polarizing film lines to determine the number of polarizing sheets stacked.

In addition, the counting section 430 can count the average value of the sum of the number of the polarizing film lines F2 counted in each of the partial images 320 by the number of polarizing films of the polarizing sheet laminated. In this way, even if the line segment is originally a polarizing film and the line segment is divided into the protective film line F1, the number of correct polarizing sheets can be grasped.

The division section 420 may be configured such that the thickness D4 of the continuous second line exceeds both the thickness D1 of the polarizing film line F2 and the thickness D2 and D3 of the protective film line F1 , The second line can be divided into kanji 20 (see FIG. 6).

The polarizing sheet counting apparatus may further include a table portion, a reflecting portion 200, a housing portion 500, and a moving portion 600.

The laminated polarizing sheet can be placed on the table portion, and the table portion can rotate the laminated polarizing sheet.

In this embodiment, the table portion can rotate the polarizing sheet stacked in a fixed state.

As described above, the division unit 420 may count the polarizing film lines in each of the partial images 320, preferably, the partial images 320 may be images of the respective corner portions of the polarizing sheet. When acquiring the partial image 320 at the corner portion, the distance through which the light irradiated by the irradiating unit 100 is transmitted is shortened and a sufficient amount of light can be ensured. Therefore, the luminance difference between the polarizing film line and the protective film line is more clearly .

In particular, it is preferable that the light irradiated from the irradiating unit 100 is directed to the edge of the laminated polarizing sheet, and inclines with respect to the incident surface of the polarizing sheet so as to incline obliquely to the exit surface of the polarizing sheet. Thus, a sufficient amount of light can be secured.

The light irradiated from the irradiation unit 100 can easily be incident on each corner of the laminated polarizing sheet even when the irradiation unit 100 and the light receiving unit 300 are fixed, .

The reflector 200 reflects light so that the light L1 irradiated by the irradiator 100 faces the polarizing sheet to change the path of the light so that the irradiated area 110 in which the polarized light sheet To be inspected.

When the reflecting portion 200 is further provided, the size of the polarizing sheet counting device can be reduced since the irradiating portion 100 and the light receiving portion 300 can be positioned more densely.

The irradiation unit 100, the reflection unit 200, and the light receiving unit 300 may be installed in the housing unit 500.

The moving part 600 may be provided at a lower portion of the housing part 500 and may have a first guide 610 and a second guide 620.

The first guide 610 may extend in a first horizontal direction (X-axis direction), and the second guide 620 may extend in a second horizontal direction (Y-axis direction) perpendicular to the first horizontal direction And the housing part 500 can be reciprocated along the first guide 610 and the second guide 620. [

Since the housing part 500 can be moved along the moving part 600, the size of the table part 700a and the polarizing sheet 10a can be increased (refer to FIG. 2 (a) 700b and polarizing sheet 10b are small (see Fig. 2 (b)), light irradiation and light reception can be easily performed at the corner portions of the respective polarizing sheets.

8 is an exemplary view showing a polarizing sheet counting apparatus according to a second embodiment of the present invention. In this embodiment, the configuration related to the table and the table may be different, and the other configuration is the same as that of the first embodiment described above, so that repeated contents are omitted as much as possible.

8, a first fixing arm 800a and a second fixing arm 800b may be provided on the housing part 500 where the irradiation part 100, the reflection part 200 and the light receiving part 300 are installed. have.

A first holder 810a may be provided at one end of the first fixing arm 800a and a second holder 810b may be provided at an end of the second fixing arm 800b.

In addition, the table portion 700c may include a third holder 710a and a fourth holder 710b.

The third holder 710a may be coupled to the first holder 810a and the fourth holder 710b may be coupled to the second holder 810b.

The table portion 700c can be rotated together with the laminated polarizing sheet 10c. The table portion 700c can be moved in a state in which the polarizing sheet 10c is laminated and the third holder 710a is coupled to the first holder 810a and the fourth holder 710b is coupled to the second holder 810b , The edge portion of the polarizing sheet 10c can be positioned in the irradiation region.

Hereinafter, the polarizing sheet counting method will be described.

9 is a flowchart showing a polarizing sheet counting method according to the first embodiment of the present invention.

9, the polarizing sheet counting method may include an incident step S910, a light receiving step S920, and a counting step S930.

The incidence step S910 may be a step of causing light to be incident on one side of the polarizing sheet in which a plurality of the polarizing sheets are laminated.

In the incidence step S910, the light is incident on the edge of the laminated polarizing sheet, and may be incident obliquely with the incident surface of the polarizing sheet.

The light receiving step S920 may be a step of receiving light emitted after the polarizing sheet is guided from the other side of the polarizing sheet.

The light emitted after the light is guided in the light receiving step S920 may be emitted obliquely with respect to the exit surface of the polarizing sheet so that a sufficient amount of light can be ensured and the brightness difference between the polarizing film line and the protective film line Can be made more clear.

The counting step S930 is a step of obtaining an image represented by luminance due to the light guide difference of the polarizing film and the protective film on the basis of the received light and counting the number of polarizing films in the image to determine the number of polarizing sheets Lt; / RTI >

The counting step S930 may have an image obtaining step S931, a dividing step S932, and a counting step S933.

The image acquiring step S931 may be a step of acquiring a first image using light emitted from the stacked polarizing sheet.

In the discriminating step S932, the protective film line having the first luminance range and the polarizing film line having the second luminance range lower than the first luminance range are scattered while the light passes through the protective film in the obtained first image Can be classified.

In a case where a plurality of luminance regions having different luminance are present on a first continuous line in the classification step S932, an area having luminance belonging to the first luminance range among the plurality of luminance regions is divided into the second luminance range The first line can be divided into the protective film lines when the area having the luminance belonging to the first luminance range is wider than the area having the luminance belonging to the first luminance range. If the area having the luminance belonging to the second luminance range among the plurality of luminance areas is wider The first line can be divided into a polarizing film line.

When the thickness of the second continuous line exceeds the thickness of the predetermined polarizing film line and the thickness of the protective film line in the division step S932, the second line can be divided into kanji.

Also, in the division step S932, the protective film line and the polarizing film line may be divided for each of the plurality of partial images obtained from the first image. Here, the partial image may be each edge image of the laminated polarizing sheet. In this case, the light received in the light receiving step S920 may be light incident on each corner of the laminated polarizing sheet and emitted.

The counting step S933 may be a step of counting the number of polarizing film lines to determine the number of polarizing sheets stacked.

The counting step S933 can grasp the number of polarizing sheets stacked on the average value of the sum of the number of polarizing film lines counted in each partial image.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10, 10a, 10b, 10c: polarizing sheet 11: polarizing film
12, 13: Protective film 20: Kanji
100: irradiator 200: reflector
300: light receiving section 320: partial image
400: counting unit 410: image obtaining unit
420: Division section 430: Count section
500: housing part 600: moving part
700a, 700b, 700c:

Claims (17)

A polarizing sheet counting apparatus for counting the number of polarizing sheets and a protective film attached to both sides of the polarizing film,
An irradiation unit for irradiating light to one side of the polarizing sheet in which a plurality of the polarizing sheets are stacked;
A light receiving unit that receives light emitted after the polarizing sheet is guided from the other side of the polarizing sheet; And
Acquiring an image represented by brightness due to a light guide difference of the polarizing film and the protective film based on light received by the light receiving section, counting the number of the polarizing films in the image, And a polarity of the polarized light. The method according to claim 1,
The counting unit
An image acquiring unit that acquires a first image using light emitted from the stacked polarizing sheet;
A protective film line having a first luminance range that is scattered while light is transmitted through the obtained first image and a polarizing film line having a second luminance range lower than the first luminance range; Wealth,
And a counting unit for counting the number of the polarizing film lines and counting the number of the polarizing sheets stacked. 3. The method of claim 2,
Wherein, when a plurality of luminance regions having different luminance levels are present on a first continuous line, the division unit is configured such that a region having a luminance belonging to the first luminance range among the plurality of luminance regions belongs to the second luminance range The first line is divided into the protective film lines if the area is wider than the area having the luminance, and the area having the luminance belonging to the second luminance range among the plurality of luminance areas is less than the area having the luminance belonging to the first luminance range And the first line is divided into the polarizing film lines when the polarizing film is wide. 3. The method of claim 2,
Wherein the dividing section divides the second line into kanji when the thickness of a subsequent second line exceeds a predetermined thickness of the polarizing film line and a thickness of the protective film line. 3. The method of claim 2,
Wherein the division unit divides the protective film line and the polarizing film line for each of a plurality of partial images obtained from the first image,
Wherein the counting unit counts the number of the polarizing sheets stacked with the average value of the sum of the number of the polarizing film lines counted in each of the partial images. 6. The method of claim 5,
Further comprising a table portion on which the laminated polarizing sheet is placed and which rotates the polarizing sheet laminated so that light irradiated from the irradiating portion is incident on each corner of the laminated polarizing sheet to be emitted therefrom, . The method according to claim 6,
Wherein the partial image is each edge image of the laminated polarizing sheet. The method according to claim 6,
Wherein the light irradiated from the irradiating unit is directed obliquely to the incident surface of the polarizing sheet facing the edge of the laminated polarizing sheet and is output obliquely to the exit surface of the polarizing sheet. The method according to claim 6,
Wherein the table portion is rotated together with the polarizing sheet laminated in the fixed state or rotated together with the laminated polarizing sheet. The method according to claim 1,
A reflector for reflecting the light emitted from the irradiation unit to change a path of the light;
A housing portion in which the irradiation portion, the reflection portion, and the light receiving portion are installed; And
Further comprising a moving unit that reciprocates the housing unit in a first horizontal direction and in a second horizontal direction perpendicular to the first horizontal direction. A polarizing sheet counting method for counting the number of polarizing films and a protective film attached to both sides of the polarizing film,
An incident step of causing light to be incident on one side of the polarizing sheet in which a plurality of the polarizing sheets are stacked;
A light receiving step of receiving light emitted after the polarizing sheet is guided from the other side of the polarizing sheet; And
Acquiring an image represented by brightness due to the light guide difference of the polarizing film and the protective film based on the received light, counting the number of the polarizing films in the image, / RTI > 12. The method of claim 11,
The counting step
An image acquiring step of acquiring a first image using light emitted from the stacked polarizing sheet;
A protective film line having a first luminance range that is scattered while light is transmitted through the obtained first image and a polarizing film line having a second luminance range lower than the first luminance range; Step,
And a counting step of counting the number of the polarizing film lines to grasp the number of the polarizing sheets stacked. 13. The method of claim 12,
Wherein when a plurality of luminance regions having different intensities are present on a first continuous line in the dividing step, an area having a luminance belonging to the first luminance range among the plurality of luminance regions is divided into the second luminance range The first line is divided into the protective film lines if the width of the first line is wider than the area having the luminance belonging to the first luminance range, and the area having the luminance belonging to the second luminance range among the plurality of luminance areas has the luminance belonging to the first luminance range And the first line is divided into the polarizing film lines if the polarizing film is wider than the polarizing film lines. 13. The method of claim 12,
Wherein when the thickness of the second continuous line exceeds a predetermined thickness of the polarizing film line and the thickness of the protective film line in the dividing step, Way. 13. The method of claim 12,
In the division step, the protective film line and the polarizing film line are divided for each of a plurality of partial images obtained from the first image,
Wherein the counting step grasps the number of polarizing sheets stacked with an average value of the sum of the number of the polarizing film lines counted in each of the partial images. 16. The method of claim 15,
Wherein the light received by the light receiving step is light that is incident and emitted at each corner of the laminated polarizing sheet, and the partial image is each edge image of the laminated polarizing sheet. 17. The method of claim 16,
Wherein the light is incident on an edge of the polarizing sheet in a laminated state, the light is incident obliquely to an incident surface of the polarizing sheet,
And the light emitted after the light guiding in the light receiving step is outputted obliquely to the exit surface of the polarizing sheet.

Images