CN216696106U

CN216696106U - Detection equipment

Info

Publication number: CN216696106U
Application number: CN202123357766.XU
Authority: CN
Inventors: 罗羽柱; 罗喜柱; 崔允喆
Original assignee: Suzhou Lemaoxing Photoelectric Co ltd
Current assignee: Suzhou Lemaoxing Photoelectric Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-07
Anticipated expiration: 2031-12-29

Abstract

The embodiment of the utility model discloses detection equipment, which aims to solve the problem of low production efficiency caused by detecting fine product defects of an optical film. The detection device includes: an illumination unit, an image pickup unit, a supply section, a transport section, and a recovery section. The camera unit comprises at least one high-speed camera; the illuminating unit and the camera shooting unit are arranged on two sides of the transportation part and are oppositely arranged; in the process that the optical film moves from the supply part to the recovery part through the transportation part, the illumination unit irradiates the first surface of the optical film, and the image pickup unit collects the image of the second surface of the optical film. Wherein, the second surface is the back of the first surface.

Description

Detection equipment

Technical Field

The embodiment of the utility model relates to the field of liquid crystal display manufacturing, in particular to detection equipment matched with liquid crystal display optical film manufacturing equipment.

Background

With the widespread use of liquid crystal displays, the prism sheet in the optical film of the liquid crystal display is capable of effectively limiting the light loss and increasing the brightness of the display due to its simple structure, and therefore, the prism sheet is also widely used in the manufacturing process of the liquid crystal display.

At present, a photosensitive resin (e.g., UV glue, acryl resin, etc.) may be generally coated on a substrate film, and the photosensitive resin is imprinted by a micro-nano imprinting mold to form a microstructure of a prism sheet, and then the imprinted photosensitive resin is subjected to ultraviolet light curing molding.

However, with the optical film produced by the above process, there may be fine product defects (e.g., scratches of 100 μm to 300 μm), and such product defects, because of being extremely fine, generally require a reduction in the speed of the production line for inspection in a high-speed production process, and may result in a reduction in production efficiency.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides detection equipment to solve the problem of low production efficiency caused by detecting fine product defects of an optical film.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

an embodiment of the present invention provides a detection apparatus, where the detection apparatus 00 includes: an illumination unit 01, an imaging unit 02, a supply section 03, a transport section 04, and a collection section 05. The camera unit 02 includes at least one high-speed camera; the illuminating unit 01 and the camera unit 02 are arranged on two sides of the transportation part 04 and are arranged oppositely; in the process that the optical film moves from the supply part 03 to the recovery part 05 through the transport part 04, the illumination unit 01 irradiates the first surface of the optical film, and the image pickup unit 02 collects an image of the second surface of the optical film; wherein the second surface is a back surface of the first surface.

In the embodiment of the present invention, the detection apparatus 00 includes: an illumination unit 01, an imaging unit 02, a supply section 03, a transport section 04, and a collection section 05. The camera unit 02 includes at least one high-speed camera; the illuminating unit 01 and the camera unit 02 are arranged on two sides of the transportation part 04 and are arranged oppositely; in the process that the optical film moves from the supply part 03 to the recovery part 05 through the transport part 04, the illumination unit 01 irradiates the first surface of the optical film, and the image pickup unit 02 collects an image of the second surface of the optical film; wherein the second surface is a back surface of the first surface. With this arrangement, one side of the optical film is irradiated (i.e., the first side) by the illumination unit, and an image of the back side (i.e., the second side) of the optical film is detected by the image pickup unit mounted with the high-speed camera, thereby avoiding reduction in the speed of the production line for detection, and improving the production efficiency and the detection efficiency.

Drawings

FIG. 1 is a schematic diagram of a process flow for manufacturing an optical film of a liquid crystal display according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a detection apparatus according to an embodiment of the present invention.

Reference numbers in the drawings illustrate: 00-detection device, 01-lighting unit, 02-camera unit, 03-supply unit, 04-transportation unit, 05-recovery unit, 06-protective film laminating unit, 07-secondary laminating unit, 08-processing unit and 09-output unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The term "and/or" herein is an association relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, a/B denotes a or B.

The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, unless otherwise specified, "a plurality" means two or more, for example, a plurality of elements means two or more elements, and the like.

Some terms/nouns involved in the embodiments of the present invention are explained below, and a brief description is given of the process of manufacturing an optical film for a liquid crystal display.

As shown in FIG. 1, a production line for producing an optical film for a liquid crystal display includes a region A, a region B, a region C, a region D, a region E and a region F for a total of 6 process regions. Specifically, the method comprises the following steps:

the area A is a substrate supply part, comprises a motor, a substrate roll, a conveying roller and the like, and is mainly used for conveying the substrate film to the next coating process.

The area B is a coating part, and includes a coating device (not shown in fig. 1) for coating the UV glue on the surface of the substrate film, and a pressure roller device, and is mainly used for pressing the UV glue coated on the surface of the substrate film to form the microstructure of the prism sheet.

The region C is an imprint mold, which includes a flexible rollable imprint mold chain (e.g., the flexible rollable imprint mold chain abcd in fig. 1, the outer side of the chain has a protruding triangular toothed microstructure, which is not shown in fig. 1), a roller, and the like, and is mainly used for embossing the UV glue sprayed on the surface of the substrate film to form the microstructure of the prism sheet, and separating the microstructure from the prism sheet.

The D area is a light curing part, comprises an ultraviolet irradiation lamp, a curing box and the like and is mainly used for carrying out ultraviolet light curing molding on the imprinted UV glue.

The E area is a separation and recovery part, comprises a separation roller, a recovery roller, a roller shaft and the like, and is mainly used for separating the imprinting mold from the UV adhesive surface layer after photocuring and recovering the processed optical film.

The following describes an exemplary detection device provided in an embodiment of the present invention with reference to fig. 2 provided in an embodiment of the present invention.

The embodiment of the utility model provides a detection device which is applied to the quality detection of the optical film after the completion of the above processes (namely, the optical film after 6 processes shown in fig. 1). That is, the optical film transported in the supply section 03 in fig. 2 described below is an optical film that has been produced to have a microstructure, i.e., an optical film recovered in the region E in fig. 1 as the optical film input by the supply section 03 in fig. 2.

As shown in fig. 2, an embodiment of the present invention provides a detection apparatus. The detection apparatus 00 includes: an illumination unit 01, an imaging unit 02, a supply section 03, a transport section 04, and a collection section 05. The camera unit 02 includes at least one high-speed camera. The illumination unit 01 and the imaging unit 02 are disposed on both sides of the transport section 04 and are disposed opposite to each other. In the process that the optical film moves from the supply part 03 to the recovery part 05 through the transport part 04, the illumination unit 01 irradiates the first surface of the optical film, and the image pickup unit 02 collects an image of the second surface of the optical film;

wherein the second surface is a back surface of the first surface.

Optionally, in an embodiment of the present application, the lighting unit includes at least one lamp cap and a lamp box, and the lamp box is used for installing the at least one lamp cap. The installation position of the lighting unit can be adjusted.

Optionally, in the embodiment of the present application, the light of the illumination unit 01 forms an included angle of 45 ° to 60 ° with the optical film. That is, at least one of the bases in the lighting unit 01 is oriented at an angle of 45 ° to 60 ° to the optical film.

Illustratively, assuming that the light of the lighting unit 01 forms an angle of 60 ° with the optical film, the installation position of the lighting unit has two orientations, that is, the incident direction of the light of the lighting unit forms an angle of 60 ° with the advancing direction of the optical film, or the incident direction of the light of the lighting unit forms an angle of 120 ° with the advancing direction of the optical film.

It can be understood that under the condition that the light of the illumination sheet 01 and the optical film form an included angle of 45-60 degrees, the light can be ensured to penetrate through the image collected by the optical film to achieve the best photographing effect, so that the problem that light spots in the photographed image caused by too strong or too weak incident light are not easy to distinguish is avoided, and the detection accuracy is further improved.

Optionally, in the embodiment of the present application, the image capturing unit 02 includes at least one high-speed video camera, but may also include other cameras, such as an X-ray camera. Therefore, the shot image is clearer, and the phenomenon that the shot image is not clear due to the fact that the optical film moves on the conveying part to cause afterimages is avoided.

Optionally, in the embodiment of the present application, the illumination unit 01 and the imaging unit 02 are disposed on two sides of the transportation portion 04, and are disposed oppositely. So, can guarantee that the image pick-up unit can gather the image after light sees through the optical film, because the slight defect of optical film can obviously lead to the light of seeing through to take place the deflection or refract and other positions obviously different, consequently detect the slight defect on the optical film more easily.

Illustratively, as shown in fig. 2, the illumination unit 01 is disposed at the left side of the transportation portion 04, and the image capturing unit 02 is disposed at the right side of the transportation portion 04, so that the image capturing unit 02 can capture an image after the light generated by the illumination unit 01 passes through the optical film.

Optionally, in the embodiment of the present application, the light emitted by the illumination unit 01 is preferably parallel light, so that a fine defect on the optical film can be more easily detected. Such as LED lights, etc.

In the present embodiment, the first surface and the second surface are opposite surfaces of the optical film. That is, the image pickup unit 02 picks up an image of the second surface of the optical film, that is, an image in which light of the illumination unit 01 passes through the optical film (enters from the first surface and exits from the second surface).

Optionally, in this embodiment of the application, the collection angle of the image capturing unit 02 is an included angle of 45 ° to 60 ° with the optical film. The collection angle of the camera unit 02 is an included angle of 45-60 degrees with the optical film, specifically, an included angle with the second surface.

Note that the incident angle of the illumination unit from the first surface of the optical film is 45 ° to 60 °, and the collection angle of the imaging unit 02 is 45 ° to 60 ° from the second surface of the optical film. The light spots in the photographed image can be ensured to be clear and visible, and the detection accuracy is further improved. However, since the first and second faces of the optical film are parallel to each other, they will not be distinguished in detail in the following description and will be collectively referred to as an included angle of 45 ° to 60 ° with respect to the optical film.

It can be understood that under the condition that the light of illumination list 01 and optical film are 45 to 60 contained angles, and the collection angle of the unit 02 of making a video recording for being 45 to 60 contained angles with the optical film second face, can guarantee that the image that light sees through the optical film and gathers reaches the best effect of shooing to avoid incident light too strong or the facula in the picture of shooing that leads to too weak difficult resolution, and then improve detection accuracy.

The detection apparatus 00 provided in the embodiment of the present invention includes: an illumination unit 01, an imaging unit 02, a supply section 03, a transport section 04, and a collection section 05. The camera unit 02 includes at least one high-speed camera; the illuminating unit 01 and the camera unit 02 are arranged on two sides of the transportation part 04 and are arranged oppositely; in the process that the optical film moves from the supply part 03 to the recovery part 05 through the transport part 04, the illumination unit 01 irradiates the first surface of the optical film, and the image pickup unit 02 collects an image of the second surface of the optical film; wherein the second surface is a back surface of the first surface. With this arrangement, one side of the optical film is irradiated (i.e., the first side) by the illumination unit, and an image of the back side (i.e., the second side) of the optical film is detected by the image pickup unit mounted with the high-speed camera, thereby avoiding reduction in the speed of the production line for detection, and improving the production efficiency and the detection efficiency.

Optionally, as shown in fig. 2, the detection apparatus 00 provided in the embodiment of the present application further includes: the protective film bonding portion 06. The protective film attaching section 06 is provided after the image pickup unit 02 and before the recovery section 05, and attaches a protective film to the detected optical film.

Optionally, in this embodiment, the protective film fitting part 06 includes a first fitting part 061 and a second fitting part 062. The first attaching portions 061 and the second attaching portions 062 are symmetrically arranged on two sides of the transport portion 04, and the first attaching portions 061 are used for attaching a protective film to the first surface; and a second attaching part 062 for attaching a protective film to the second surface.

In the embodiment of the present invention, the protective film attaching portion 06 is disposed behind the image capturing unit 02 to attach and protect the optical film after detection, and if the protective film attaching portion is disposed in front of the image capturing unit, the protective film may affect the imaging of the light passing through the second surface, thereby reducing the detection accuracy. The protective film attaching part 06 is disposed before the recovering part 05, and is used for attaching and protecting the optical film before recovery (the optical film at this time has a microstructure, and the film can prevent dust and foreign matters from falling into a gap of the microstructure). If the protective member is disposed after the recovery unit 05, a better protective effect cannot be obtained.

Optionally, in this embodiment of the application, the protective film attaching part 06 may specifically include: protective film rolls, laminating rollers, transfer rolls, and the like. The litigation protective film of the protective film roll passes through the conveying roller and the attaching roller, and the passing optical film is subjected to film attaching operation.

Note that, since the first surface and the second surface of the optical film are both subjected to film attachment, the first attaching portion 061 and the second attaching portion 062 are respectively disposed on both sides of the optical film (i.e., both sides of the transporting portion 04), and are symmetrically disposed. So that the first attaching portion 061 attaches the protective film to the first surface; the second attaching portion 062 attaches a protective film to the second surface.

Alternatively, the protective film of the first surface and the protective film of the second surface may be the same or different. For example, the same protective film may be used if the first surface and the second surface have microstructures. If the first surface has the microstructure, selecting a protective film for protecting the microstructure; the second surface has no microstructure, so that a common protective film with relatively low price can be selected. The method can be selected according to actual use requirements, and the embodiment of the application is not particularly limited.

It can be understood that, because the first surface and the second surface of the optical film are both pasted with films, on one hand, the microstructure of the optical film can be protected, and dust and foreign matters can be effectively prevented from falling into the gap of the microstructure; on the other hand, the optical film is uniformly stressed in the rolling process, and the microstructure is prevented from being damaged.

Optionally, as shown in fig. 2, the detection apparatus 00 provided in the embodiment of the present application further includes: a secondary lamination 07, the secondary lamination 07 comprising at least one set of pressure rollers. The secondary laminating part 07 is provided after the protective film laminating part 06 and before the recovering part 05, and is used for additionally laminating the optical film and closely laminating the protective film to the optical film.

The secondary laminated portion is a concept of primary lamination with respect to the region B shown in fig. 1 as a coating portion. The secondary laminating part can be used for performing supplementary laminating on the optical film so as to compact the optical film; the protective film can also be tightly attached to the optical film by pressure.

It is understood that the secondary laminating portion can be used for performing supplementary lamination on the optical film to compress the optical film; on the other hand, the protective film can be tightly attached to the optical film through pressure, so that the protective effect is better.

Optionally, in this embodiment of the present application, the processing unit 08 is optional. The processing unit 08 is electrically connected to the illumination unit 01, the imaging unit 02, the supply section 03, the transport section 04, and the collection section 05.

And the processing unit 08 is used for controlling the illuminating unit 01 to illuminate the first surface of the optical film and the camera unit 02 to collect the image of the second surface of the optical film in the process of controlling the optical film to move along the conveying part 04.

Optionally, in this embodiment of the application, the processing unit may specifically include a processor and a controller. The processor is used for identifying and processing light spots of the shot image; the controller is used for controlling the opening or closing of the functions of each unit.

Specifically, the controller may control the optical film to move along the transport portion 04, and control the illumination unit 01 to illuminate the first side of the optical film, and control the image pickup unit 02 to capture an image transmitted through the second side of the optical film.

Optionally, as shown in fig. 2, the detection apparatus 00 provided in the embodiment of the present application further includes: the output unit 09 and the output unit 09 are connected with the processing unit 08. The processing unit 08 may control the output unit 09 to output the prompt information in a case where the light spot in the image of the second surface is detected to satisfy a preset condition.

Wherein the preset conditions include at least one of the following: spot size, spot area, and spot transmittance.

Optionally, in this embodiment of the application, an output mode of the output unit includes at least one of: speech output, text output, image output, alert tones, etc. The output unit is used for outputting prompt information under the condition that the light spots in the image of the second surface meet the preset conditions, and prompting a user to monitor unqualified products (namely products with serious defects). Specific prompting methods include, but are not limited to, text, voice, and the like. The determination may be specifically performed according to actual use requirements, and the embodiment of the present application is not specifically limited.

Optionally, in this embodiment of the application, the preset condition specifically includes:

a. the spot size refers to a size of a spot on the image being greater than or equal to a preset size (specifically, a length threshold and/or a width threshold of one spot), and thus the section of the optical film is determined to be an unqualified product.

b. The spot area refers to the area of a spot on an image which is larger than or equal to a preset area (specifically, an area threshold), and then the section of the optical film is determined to be an unqualified product.

c. The light transmittance of the light spots refers to the brightness value or the gray value of the light spots on the image is larger than or equal to a target threshold value, and therefore the UV adhesive layer of the section of the optical film is determined to be possibly thinner and is determined to be an unqualified product.

It can be understood that, in a case where the processing unit detects that the image of the optical film satisfies the preset condition (i.e., an unqualified product or a product with a serious defect), the processing unit may control the output unit to output a prompt message, so as to prompt a user that the optical film may have a large defect, thereby improving the detection efficiency and the intelligent degree.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A detection device, characterized in that the detection device (00) comprises: an illumination unit (01), an imaging unit (02), a supply unit (03), a transport unit (04), and a recovery unit (05);

the camera unit (02) comprises at least one high-speed camera;

the lighting unit (01) and the camera shooting unit (02) are arranged on two sides of the transportation part (04) and are arranged oppositely;

in the process that the optical film moves from the supply part (03) to the recovery part (05) through the transportation part (04), the illumination unit (01) irradiates a first surface of the optical film, and the image pickup unit (02) collects an image of a second surface of the optical film;

wherein the second surface is a back surface of the first surface.

2. The detection apparatus according to claim 1, wherein the detection apparatus (00) further comprises: a protective film bonding section (06);

and a protective film bonding unit (06) which is provided after the imaging unit (02) and before the recovery unit (05) and bonds a protective film to the detected optical film.

3. The detection apparatus according to claim 2, wherein the protective film attaching portion (06) includes a first attaching portion (061) and a second attaching portion (062);

the first attaching part (061) and the second attaching part (062) are arranged on two sides of the conveying part (04) and are symmetrically arranged;

the first attaching part (061) is used for attaching a protective film to the first surface;

the second applying part (062) is used for applying a protective film to the second surface.

4. The detection apparatus according to claim 2, wherein the detection apparatus (00) further comprises: a secondary lamination (07), the secondary lamination (07) comprising at least one set of pressure rollers;

and a secondary laminating part (07) which is provided after the protective film bonding part (06) and before the recovery part (05) and which is used for performing supplementary lamination on the optical film and enabling the protective film to be tightly bonded with the optical film.

5. The detection apparatus according to claim 1, wherein the detection apparatus (00) further comprises: a processing unit (08);

the processing unit (08) is electrically connected with the lighting unit (01), the camera shooting unit (02), the supply part (03), the transportation part (04) and the recovery part (05);

the processing unit (08) can control the illuminating unit (01) to illuminate the first surface of the optical film during the process of controlling the optical film to move along the conveying part (04), and the image pick-up unit (02) collects the image of the second surface of the optical film.

6. The detection apparatus according to claim 5, wherein the detection apparatus (00) further comprises: an output unit (09), the output unit (09) being connected to the processing unit (08);

the processing unit (08) is used for controlling the output unit (09) to output prompt information under the condition that the light spots in the image of the second surface meet the preset condition;

wherein the preset condition comprises at least one of the following: spot size, spot area, and spot transmittance.

7. A testing device according to claim 1, wherein the light rays of the illumination unit (01) are at an angle of 45 ° to 60 ° to the optical film.

8. The detection apparatus according to claim 1, wherein the collection angle of the camera unit (02) is an angle of 45 ° to 60 ° with respect to the optical film.