KR20230063961A - Control apparatus for optic inspection of inspecting object - Google Patents

Abstract

The present invention relates to a control device for optical inspection of an object to be inspected, comprising: an object transport module for seating and transporting an object to be inspected; a motor encoder for generating a position encoder signal of the object transport module; A lighting module for irradiating light onto the transported object to be inspected, an image acquisition module for photographing the object irradiated with light by the lighting module, and a light quantity measurement module for measuring the amount of light emitted from the lighting module; It receives the position encoder signal of the object transport module from the motor encoder, calculates the position value of the object transport module based on this, and based on the reference light intensity value of the preset lighting corresponding to the location value of the object transport module, the corresponding target The operation of the lighting module is controlled so that the light is irradiated to the corpse, and the measured light amount value of the light is provided from the light amount measurement module, and the reference light amount value of the preset lighting corresponding to the measured light amount value and the position value of the object transport module is calculated. If they are not identical, the measured light intensity value is corrected so that the measured light intensity value is equal to the reference light intensity value of the preset lighting corresponding to the position value of the object transport module, and then based on the corrected light intensity value By including a control module that controls the operation of the lighting module so that light is irradiated to the object to be inspected, and controls the operation of the image acquisition module so that the object to be inspected is photographed in a state in which the light output from the lighting module is irradiated to the object to be inspected , It is not only possible to efficiently and automatically perform the external inspection of the subject, but also to obtain an optimal and clear image by automatically adjusting the lighting at the position of the subject, and various defects of the subject to be inspected more precisely. and can be accurately detected.

Description

Control device for optical inspection of a subject {CONTROL APPARATUS FOR OPTIC INSPECTION OF INSPECTING OBJECT}

The present invention relates to a control device for optical inspection of a subject to be inspected.

In general, with the development of technology, it has become possible to produce articles of various types through various methods. For example, conventionally, an article having a desired shape can be produced through cutting or grinding. Alternatively, a so-called plastic injection method in which a liquid material, for example, liquid plastic is injected into a metal mold made of various materials and then cooled and injected to form a part, has also been utilized.

On the other hand, in order to cope with the increase in population and the growth of the market, manufacturers who manufacture products are faced with the task of producing a variety of products at low cost. In particular, as the use cycle of various products gradually shortens, the time required to equip mass production facilities for products has also become shorter.

Here, along with rapid mass production, another challenge given to manufacturers is to maintain the yield of the produced article. At the time when products were produced by handicraft, workers directly performed and controlled all production work, so despite the design of the same product, the quality of the product was consistently maintained by various environmental factors such as individual worker's skill or fatigue. It was practically impossible to maintain.

On the other hand, uniformity in manufacturing has been able to be obtained to a large extent since the era of mass automatic production by machines, but inspections for various mechanical errors and defects occurring during the production and assembly process of each item are still performed by workers. The method of visually inspecting each worker is used, which is not only expensive, but also consistent standards for judging product quality are applied due to the skill level or fatigue of each worker or the difference in individual standards, just like the problems of the handmade product production era. There are still issues that may not be addressed.

In addition, consumers' standards for quality are also increasing day by day, and manufacturers are also making efforts to eliminate defective products in the production and assembly processes of products, intermediate processes and final assembly processes. As part of these efforts, in the assembly process, high and uniform quality of the final product is ensured by using various inspection equipment to determine whether the product satisfies the standard quality, and removing intermediate assembly products judged to be of poor quality in advance. Maintaining and obtaining a high yield is one subject.

Looking at the method of inspecting intermediate goods or final products generated in the manufacturing process as described above in more detail, the method currently used in the industrial field is to take a video of the item to be inspected using a photographing equipment, and then take a picture. There is a method in which the workers who perform the inspection of the images are manually checked one by one.

However, as pointed out above, this method not only incurs excessive costs for inspection, but also the quality is easily affected by various external factors such as individual worker's skill, fatigue, and working environment, as in the production process of conventional products. The speed at which it is performed is also not sufficient, which is likely to affect the productivity of the article.

Therefore, in order to solve this problem, introduction of an inspection device and method capable of automatically inspecting an article according to the same standard is required, and an inspection device and method capable of performing an inspection of an article more precisely and effectively is required to introduce

Domestic Patent No. 10-1605229 (Announced on March 21, 2016)

The present invention has been made to solve the above-described problems, and an object of the present invention is to apply for safe fixing or confidentiality of parts during manufacturing, such as patterns of display panels or substrates, panels, modules, etc. of electronic devices through a motor encoder. Detects the position value of the resin layer, which is a subject object having a transparent or translucent characteristic, and controls the light to be irradiated to the subject based on the reference light intensity value of illumination corresponding to the position value of the subject object, and controls the irradiation of light to the subject object. After measuring the amount of light irradiated on the corpse, correcting the light amount value of lighting so that the measured light amount value is the same as the standard light amount value of lighting, and then controlling the light to be irradiated to the subject based on the corrected light amount value , It is not only possible to efficiently and automatically perform the external inspection of the subject, but also to obtain an optimal and clear image by automatically adjusting the lighting at the position of the subject, and various defects of the subject to be inspected more precisely. It is an object of the present invention to provide a control device for optical inspection of an object to be inspected so that it can be detected accurately.

One aspect of the present invention in order to achieve the above object, the test subject transfer module for seating and transporting the test subject; A motor encoder for generating a position encoder signal of the inspection object transfer module; a lighting module for radiating light to a corresponding inspected object transported by the inspected object transfer module; an image acquisition module for photographing a corresponding object irradiated with light by the illumination module; a light quantity measuring module provided inside/outside the lighting module and measuring a light quantity value of light emitted from the lighting module; and receives a position encoder signal of the object transport module from the motor encoder, calculates a position value of the object transport module based on this, and sets a reference light intensity value of lighting corresponding to the position value of the object transport module. Based on this, control the operation of the lighting module so that light is irradiated to the object to be inspected, receive the measured light amount value from the light amount measurement module, and correspond to the measured light amount value and the position value of the object transport module Comparing the reference light intensity value of the preset lighting to be the same, if not the same, correcting the light intensity value of the lighting so that the measured light intensity value is the same as the reference light intensity value of the preset lighting corresponding to the position value of the object transport module Then, the operation of the lighting module is controlled so that the light is irradiated to the subject based on the corrected light intensity value, and the subject is photographed in a state in which the light output from the lighting module is irradiated to the subject. It is to provide a control device for optical inspection of a subject including a control module for controlling the operation of the image acquisition module as much as possible.

Here, the control module sets the output intensity of at least one LED light emitting element included in the lighting module during the camera shutter exposure time of the image acquisition module to a predetermined overdrive in the form of a pulse signal greater than a rated continuous maximum value. It is preferable to control the operation of the lighting module by applying a constant current value and using a constant current over drive control method using pulse control to obtain high luminance brightness.

Preferably, the over-driving constant current value may be set in consideration of a cooling time of each LED light emitting device included in the lighting module between each pulse signal.

Preferably, the lighting module may include a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting element.

Preferably, the control module sets a target value of the output level of each LED light emitting channel provided in the lighting module according to a user's specific input signal output according to the user's request, and controls each LED light emitting channel for high-speed switching control. Output channel selection and order setting, and clock generation for generating high-speed switching operation signals are set, and each LED provided in each LED emitting channel is based on the output level target value of each LED emitting channel set above. In order to adjust the brightness of the light emitting element, a target value of output voltage of each LED light emitting channel is generated and output, and each LED light is emitted in synchronization with the output channel selection and order setting information and clock information of each LED light emitting channel set above. High-speed switching of each LED light emitting channel provided in the lighting module may be controlled according to a target output voltage of the channel.

Preferably, the control module may output a specific input signal of a corresponding user according to a request of the corresponding user based on a graphical user interface (GUI).

Preferably, the control module may perform high-speed control by using a hardware programming-based FPGA (Field Programmable Gate Array) for a high-speed switching function.

Preferably, the control module comprises at least one of a set value for an output level target of each LED light emitting channel, a set value for output channel selection and order of each LED light emitting channel, and a set value for generating a clock. The set value of can be controlled to be stored in a separate storage module.

Preferably, the control module, in order to protect each LED light emitting element from damage due to the continuous turning on of each LED light emitting element provided in each LED light emitting channel of the lighting module, for each LED light emitting channel of the lighting module When the high-speed switching operation signal is changed, each LED light emitting channel of the lighting module may be controlled to perform high-speed switching only for a predetermined operation standard time less than or equal to a predetermined operation standard time.

Preferably, the user's specific input signal output according to the user's request may be provided through an external terminal or server.

Preferably, the external terminal or server transmits a specific input signal of a corresponding user for user setting of lighting control wired or wirelessly according to the user's request through a pre-installed user setting related application for optical inspection of the object to be inspected. can be transmitted to the control module.

Preferably, the control module detects an idle period of a photographing operation for the image acquisition module, and determines an idle state when a photographing operation signal of the image acquisition module is not input for a predetermined reference time or longer; After the determined idle state, an automatic reset function of removing a state during a photographing operation and initializing it to an initial input state may be performed so that the first state is maintained.

Preferably, the image acquisition module is at least one for obtaining an image having a two-dimensional image by scanning an upper surface image of the object to be inspected in a line unit in a state in which the light emitted from the lighting module is irradiated to the object to be inspected. It can be made with a linescan camera.

Preferably, the control module may control the operation of each line scan camera so that the object to be inspected is photographed in units of lines in a state in which the light emitted from the lighting module is irradiated to the object to be inspected.

Preferably, the inspected object is made of a pattern of a display panel or a polyhedron-shaped article having a plurality of faces, or is attached to a TFT substrate of a display panel and a bonding portion of a CF (Color Filter) substrate or a TFT substrate of a display panel. It may be made of a transparent or translucent silicone or epoxy resin layer applied to at least one of the interface between the drive-IC (Integrated Circuit) and the bonded interface between the drive-IC and the printed circuit board (PCB).

Preferably, the control module controls the operation of the image acquisition module and the lighting module so that the camera shutter of the image acquisition module is opened and the illumination of the lighting module is emitted in synchronization with a preset trigger signal of the camera shutter. can do.

Preferably, the control module generates a trigger signal of a camera shutter for capturing an image using a position value of the object transfer module, and synchronizes with the generated camera shutter trigger signal to a camera shutter of the image acquisition module. At the same time as is opened, operations of the image acquisition module and the lighting module may be respectively controlled so that the light of the lighting module emits light.

Preferably, the lighting module may include a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting unit.

Preferably, each LED light emitting unit provided in each LED light emitting channel includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, It may include at least one blue LED light emitting element emitting blue light and at least one white LED light emitting element emitting white light.

Preferably, each red LED light emitting element, each green LED light emitting element, each blue LED light emitting element, and each white LED light emitting element provided in each LED light emitting part of each LED light emitting channel is mounted on one LED chip. It can be made in the form of a package.

Preferably, the control module selectively changes the brightness and color of at least one LED light emitting element provided in the lighting module according to a position value of the object-to-be-tested transport module so that the light is radiated to the object to be inspected. can control the operation of

Preferably, the lighting module comprises a main body forming an overall body and having a space therein; a plurality of LED light-emitting channels mounted on one side of the space provided in the main body, operated under the control of the control module, and connected in parallel to each other including at least one LED light-emitting part on a printed circuit board (PCB); a prism sheet mounted in a space provided in the main body and improving luminance of light emitted by each LED light emitting element provided in each LED light emitting channel; a condensing lens installed in a space provided in the main body and condensing the light passing through the prism sheet; And it is mounted on a space provided in the main body, is fixedly installed on a path identical to or parallel to the path of the light collected by the condensing lens, reflects the light condensed by the condensing lens toward a corresponding object to be inspected, and It may include a half mirror that transmits reflected light that is incident and reflected back from the object to be inspected toward the image acquisition module.

Preferably, each LED light emitting unit provided in each LED light emitting channel includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, It may include at least one blue LED light emitting element emitting blue light and at least one white LED light emitting element emitting white light.

Preferably, each red LED light emitting element, each green LED light emitting element, each blue LED light emitting element, and each white LED light emitting element provided in each LED light emitting part of each LED light emitting channel is mounted on one LED chip. It can be made in the form of a package.

Preferably, a temperature measuring module may be further included that is mounted in a space provided in the main body and is provided around the lighting module and measures the ambient temperature of the lighting module.

Preferably, the control module receives the ambient temperature value of the lighting module measured from the temperature measurement module and controls the operation of a separate temperature control module to maintain a preset reference temperature value based on the provided temperature value.

Preferably, the temperature control module may include at least one air discharge passage part and at least one blowing fan for discharging air inside the space part provided in the main body to the outside.

Preferably, the control module may perform an external inspection of the object to be inspected based on the image of the object to be inspected obtained from the image acquisition module.

Preferably, the external inspection of the object to be inspected, performed by the control module, is determined as a good product or a defective product.

Preferably, the control module compares a difference between a width value of an inspection area to be inspected and a width value of a peripheral area of the inspection area to be referenced for inspection when inspecting the external appearance of the object to be inspected, and the width of the comparison result is obtained. Depending on the difference value, at least one application state of non-coating, over-coating, disconnection, partial dent, or partial extraction of the subject may be inspected and determined.

Preferably, the control module extracts width/height information of the inspection area of the subject from the image of the subject obtained from the image acquisition module, and the extracted width/height information of the inspection area of the subject The height is compared with a preset standard width/height for the inspection area of the corresponding inspected object, and if the width/height difference value of the comparison result does not fall within the preset standard width/height difference range, it may be determined as defective.

Preferably, the control module sets the width/height of a specific inspection area to be inspected in the image of the subject obtained from the image acquisition module, and sets the specific inspection area to be referred to for inspection in the image of the subject. Set the width/height of the surrounding area for , compare the brightness of the set specific inspection area with the brightness difference of the set surrounding area, and select an area where the brightness difference value of the comparison result does not fall within the preset reference brightness difference range. can be judged as defective.

Preferably, the control module compares the difference between the width/height of the set specific inspection area and the set width/height of the surrounding area, and determines the specific inspection area of the subject according to the width/height difference value of the comparison result. It is possible to inspect and determine the coating state of at least one of uncoated, over-coated, disconnected, partially cut, or partially drawn out.

Preferably, the control module converts at least one information of the image of the subject to be inspected obtained from the image acquisition module and information on the external appearance of the subject to be inspected into a database (DB) for each subject to be inspected, and is stored in a separate storage module. can be controlled to be stored in

Preferably, the control module may control the display of at least one of the image of the object to be inspected obtained from the image acquisition module and information on the external appearance of the object to be inspected to be displayed on a separate display module.

Preferably, the control module transmits at least one information of the image of the subject to be inspected obtained from the image acquisition module and information on the external appearance of the subject to be inspected through a separate communication module in a wired or wireless communication method. It can be controlled to be transmitted to the terminal or server.

Preferably, the external terminal or server searches or retrieves at least one of the image of the subject to be inspected and the external appearance inspection result information of the subject to be inspected transmitted from the communication module through a previously installed application related to the optical inspection of the subject to be inspected. A service may be provided to be displayed on a display screen.

Preferably, the lighting module may include a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting unit.

Preferably, each LED light emitting unit provided in each LED light emitting channel includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, It may include at least one blue LED light emitting element emitting blue light and at least one white LED light emitting element emitting white light. .

Preferably, the control module controls the operation of the lighting module so that the light having each color output from the lighting module is sequentially irradiated to the subject to be inspected, and the light having each color output from the lighting module The operation of the image acquisition module is controlled so that the object to be inspected is photographed in a state in which the object to be inspected is sequentially irradiated, and an entire image having a two-dimensional image of the object to be inspected obtained from the image acquisition module is received and used. A two-dimensional image of the target subject is separated for each color name, and a combined image is created for each color name by overlapping the separated two-dimensional images of the subject for each color name, and then combined for each color name. After comparing and analyzing the image and the preset reference image to select the color name combination image most similar to the reference image, the external appearance of the subject is inspected in a state in which light having a color corresponding to the selected color name combination image is irradiated. You can control what you can do.

According to the control device for the optical inspection of the inspected object of the present invention as described above, the pattern of the display panel or the substrate, panel, module, etc. of the electronic device is applied for safe fixing or confidentiality of parts during manufacture through the motor encoder. Detects the position value of the resin layer, which is the inspected object having the characteristic of being transparent or translucent, and controls the light to be irradiated to the inspected object based on the reference light intensity value of illumination corresponding to the position value of the inspected object. After measuring the amount of light irradiated to the object to be inspected and correcting the light amount value so that the measured light amount value is the same as the standard light amount value of lighting, the light is irradiated to the subject based on the corrected light amount value. By doing so, it is possible not only to efficiently and automatically perform an external inspection of the object to be inspected, but also to obtain an optimal and clear image by automatically adjusting lighting at the location of the object to be inspected, and to better detect various defects of the object to be inspected. It has the advantage of precise and accurate detection.

1 is an overall block configuration diagram for explaining a control device for an optical inspection of a subject according to an embodiment of the present invention.
2 is a partially cut perspective view for explaining an example of a lighting module applied to an embodiment of the present invention.
3 is a conceptual diagram for explaining the operation of a lighting module applied to an embodiment of the present invention.
4 is a detailed block configuration diagram for explaining an external terminal or server applied to an embodiment of the present invention.

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

When it is said that a certain part "includes" a certain component throughout the specification, it means that it may further include other components without excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software. .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Combinations of each block of the accompanying block diagram and each step of the flowchart may be performed by computer program instructions (execution engine), and these computer program instructions are executed by a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment. Since it can be mounted, the instructions executed through the processor of a computer or other programmable data processing equipment create means for performing the functions described in each block of the block diagram or each step of the flowchart. These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular way, such that the computer usable or computer readable memory The instructions stored in are also capable of producing an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flow chart.

In addition, since the computer program instructions can be loaded on a computer or other programmable data processing equipment, a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to generate a computer or other programmable data processing equipment. It is also possible that instructions performing possible data processing equipment provide steps for executing the functions described in each block of the block diagram and each step of the flow chart.

In addition, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical functions, and in some alternative embodiments may refer to blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may be performed in the reverse order of their corresponding functions, if necessary.

1 is an overall block configuration diagram for explaining a control device for optical inspection of a subject according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining an example of a lighting module applied to an embodiment of the present invention. 3 is a conceptual diagram for explaining the operation of a lighting module applied to an embodiment of the present invention, and FIG. 4 is a specific block configuration for explaining an external terminal or server applied to an embodiment of the present invention. It is also

1 to 4, the control device for optical inspection of a subject according to an embodiment of the present invention includes a subject transfer module 100, a motor encoder 150, a lighting module 200, an image Acquisition module 250, light amount measurement module 300, control module 350, and power supply module 400, and the like. In addition, the control device for optical inspection of a subject according to an embodiment of the present invention includes a temperature measurement module 450, a temperature control module 500, a storage module 550, a display module 600, and a communication module 650. ), an external terminal and/or a server 700 may be further included. On the other hand, since the components shown in FIGS. 1 to 4 are not essential, the control device for optical inspection of a subject according to an embodiment of the present invention may have more or fewer components. there is.

Hereinafter, components of a control device for optical inspection of a subject according to an embodiment of the present invention will be described in detail.

The inspection object transfer module 100 is connected to the control module 350, and under the control of the control module 350, the inspection object 1 is seated on the stage (S) (or panel transporter) in one direction. It performs the function of transferring to

Since such a subject transfer module 100 can be applied by selecting and applying a two-dimensional transfer device of various structures, including a conveyor roller or a conveyor belt widely used in the industrial field, the present invention is specific. A description of the structure and its action will be omitted.

On the other hand, the inspected object 1 is made of, for example, a polyhedron-shaped article having a pattern and/or multiple faces of a display panel (Panel), a bonding portion between a TFT substrate of a display panel and a CF (Color Filter) substrate, a display The transparent and/or translucent characteristics applied to at least one of the interface between the drive-IC (Integrated Circuit) attached to the TFT substrate of the panel and/or the bonded interface between the drive-IC and the printed circuit board (PCB). It is preferably made of a silicone or epoxy resin layer with

The motor encoder 150 is connected to the control module 350, and according to the control of the control module 350, a motor mounted on the object transport module 100 is used to transfer the object to be inspected. It performs the function of generating the position encoder signal of (100).

The lighting module 200 is connected to the control module 350 and performs a function of irradiating light to the corresponding object 1 transported by the object transfer module 100 under the control of the control module 350. do.

In addition, the lighting module 200 preferably includes a plurality of LED light emitting channels (CH1 to CHn) connected in parallel to each other having at least one LED light emitting unit (LED1 to LEDn).

At this time, each LED light emitting unit (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn) includes at least one red LED light emitting element (R_LED) emitting red light and green light At least one green LED light emitting element (G_LED) emitting blue light, at least one blue LED light emitting element (B_LED) emitting blue light, and/or at least one white light emitting element white. It may include at least one LED light emitting element among the LED light emitting elements W_LED.

In addition, it is provided in each LED light emitting unit (LED1 to LEDn) of each LED light emitting channel (CH1 to CHn) to ensure uniformity of light emitted from the lighting module 200 and to facilitate color mixing. At least one of the red LED light emitting elements (R_LED), each green LED light emitting element (G_LED), each blue LED light emitting element (B_LED), and/or each white LED light emitting element (W_LED) is one LED. It is preferably mounted on a chip and made in the form of a package.

For example, as shown in FIGS. 2 and 3 , the lighting module 200 forms an overall body, and includes a body 210 having a space O therein, and a body 210 provided in the body 210. Mounted on one side of the space (O), operated under the control of the control module 350, and having at least one LED light emitting unit (LED1 to LEDn) on a printed circuit board (PCB), a plurality of parallel connected to each other It is mounted in the LED light emitting channels (CH1 to CHn) and the space portion (O) provided in the main body 210, and emitted by each LED light emitting element (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn). A prism sheet 220 for improving the luminance of light, a condensing lens 230 mounted in the space O provided in the main body 210 and condensing the light passing through the prism sheet 220, and the main body ( 210), it is installed on the same or parallel path as the path of the light collected by the condensing lens 230, and the light condensed by the condensing lens 230 is transmitted to the object to be inspected. (1) It may be formed by including a half mirror 240, etc., which reflects in the direction and transmits the incident reflected light that is reflected back from the object to be inspected 1 in the direction of the image acquisition module 250.

Here, the half mirror 240 is a mirror that reflects part of the light and transmits part of the light from both sides of the mirror, and may be replaced by a name of a semi-transparent mirror or a 2-way mirror.

This half mirror 240 is up/down based on the direction in which the light condensed by the condensing lens 230 is incident so that the light condensed by the condensing lens 230 is reflected in the direction of the surface of the corresponding inspected object 1. It is preferable to be disposed inclined in the direction.

At this time, the half mirror 240 is preferably disposed inclined at an angle of about 30 to 60 degrees (more preferably, about 45 degrees) based on the incident angle of the light collected by the condensing lens 230.

The image acquisition module 250 is connected to the control module 350, and under the control of the control module 350, performs a function of photographing the object 1 irradiated with light by the lighting module 200. .

In addition, the image acquisition module 250 scans the upper surface image of the object to be inspected 1 line by line in a state in which the light emitted from the lighting module 200 is irradiated to the corresponding object 1 to obtain a two-dimensional image. Preferably, it is composed of at least one line scan camera that acquires an image having an image.

The linescan camera does not acquire images in units of areas, but through a single line, that is, a one-dimensional linear CMOS (Complementary Metal Oxide Semiconductor) or CCD (Charge Coupled Device) image sensor ( As a camera of a method of acquiring a two-dimensional image by scanning in units of lines, in order to generate an image of the subject (1) by the line scan camera, the line scan camera or the subject (1) is operated at a constant speed. The entire image of the subject 1 is generated as an image by combining images obtained by moving and photographing a part of the subject 1 at the moment of movement.

On the other hand, the image acquisition module 250 is preferably implemented as at least one line scan camera, but is not limited thereto. Any USB (Universal Serial Bus) camera that is generally used, a normal video camera that can record continuous video, a camera or device (eg, IP camera, CCTV, etc.) that can take video of a specific place Anything is possible.

At this time, the USB camera is basically composed of a camera, an interface unit, and a USB host, and a plurality of endpoints are configured between the camera and the interface unit, and one of them is an endpoint dedicated to snapshots. , and the other is used as a picture-only endpoint.

The camera processes an input image into digital data and outputs the digital data to the interface unit, and the interface unit converts digital data input through an endpoint to conform to USB standard specifications and transmits the converted digital data to the USB host. It displays the data on its own monitor or transmits it to the other USB host for image communication.

On the other hand, although not shown in the drawing, the image acquisition module 250 typically includes a real image sensor, that is, an image sensor, an image signal processor (ISP), and a back_end chip. Include etc.

The image sensor outputs an imaging signal formed by light incident from a lens as unprocessed Bayer RGB format data. The image signal processor (ISP) converts the Bayer RGB format data into RGB format data, converts it into YUV format data required for a screen output of the display device, and outputs the converted data.

The back-end chip is in charge of controlling the camera module, including processing YUV format data output from the image signal processor (ISP) and outputting a photographed image through a screen of a display device. A Mobile Switching Modem (MSM) or a Digital Signal Processor (DSP) may be used. Meanwhile, the image signal processor (ISP) and/or the back-end chip may be included in a control module 350 to be described later.

That is, when photographing is performed using the image acquisition module 250, the image sensor outputs unprocessed Bayer RGB format data according to an image pickup signal formed by light incident from the lens, and an image signal processor receiving the unprocessed Bayer RGB format data ( ISP) converts this into actual RGB format data, and converts this RGB format data into YUV format data required in the display screen output, that is, required in the back-end chip for image processing, and outputs the converted data. Then, the back-end chip processes the received YUV format data and outputs the captured image through the screen of the display device.

The light quantity measuring module 300 is provided inside and/or outside the lighting module 200, and measures the light quantity value of the light emitted from the lighting module 200 according to the control of the control module 350, that is, the illuminance (Lux) It performs a function of measuring a value and transmitting it to the control module 350.

The control module 350 is a module in charge of overall control of the control device for optical inspection of a subject according to an embodiment of the present invention, and in particular, the position encoder signal of the subject transfer module 100 from the motor encoder 150 is provided, calculates the position value of the target object transport module 100 based on this, and calculates the position value of the target object transport module 100 based on the reference light intensity value of the preset lighting corresponding to the position value of the target object 1. It performs a function of controlling the operation of the lighting module 200 so that light is irradiated.

In addition, the control module 350 receives the measured light intensity value from the light intensity measurement module 300 and receives the measured light intensity value and the reference light intensity value of the predetermined lighting corresponding to the position value of the object transfer module 100. If they are not the same, the measured light intensity value is corrected so that the measured light intensity value is the same as the reference light intensity value of the preset illumination corresponding to the position value of the object transport module 100, and then the corrected illumination It performs a function of controlling the operation of the lighting module 200 so that light is irradiated to the subject 1 based on the light quantity value of .

In addition, the control module 350 controls the operation of the image acquisition module 250 so that the subject 1 is photographed in a state in which the light output from the lighting module 200 is irradiated to the subject 1. Do it.

In addition, the control module 350 sets the output intensity of at least one LED light emitting element provided in the lighting module 200 during the camera shutter exposure time of the image acquisition module 250 in the form of a pulse signal greater than the rated continuous maximum value. A function of controlling the operation of the lighting module 200 can be performed by applying a predetermined overdriving constant current value of the constant current overdrive control method using pulse control to obtain high luminance brightness.

At this time, it is preferable that the over-driving constant current value is set in consideration of the cooling time of each LED light emitting element provided in the lighting module 200 between each pulse signal.

In addition, the control module 350 sets the output level target value of each LED light emitting channel (CH1 to CHn) provided in the lighting module 200 according to the user's specific input signal output according to the user's request, and controls high-speed switching. Setting the output channel selection and order of each LED light emitting channel (CH1 to CHn) and clock generation for generating a high-speed switching operation signal, and setting each LED light emitting channel (CH1 to CHn) In order to adjust the brightness of each LED light emitting element (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn) based on the output level target value of each LED light emitting channel (CH1 to CHn) output voltage target value Generating and outputting, in synchronization with the setting information and clock information of the output channel selection and order of each LED light emitting channel (CH1 to CHn) set above, according to the output voltage target value of each output LED light emitting channel (CH1 to CHn) A function of controlling high-speed switching of each LED light emitting channel (CH1 to CHn) provided in the lighting module 200 may be performed.

That is, the control module 350 generates a pulse width modulation (PWM) control signal according to the output voltage target value of each LED light emitting channel (CH1 to CHn) of the lighting module 200, and Outputs a high-speed switching control signal for controlling the ON/OFF high-speed switching operation of a plurality of driving switches (e.g., high-current semiconductors such as FET or IGBT) according to the generated pulse width modulation (PWM) control signal By doing so, it is possible to perform a function of high-speed controlling the output current supplied to each LED light emitting element (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn) of the lighting module 200 by minimizing the delay in response speed. can

At this time, in relation to the high-speed control, in one embodiment of the present invention, the case of a system for photographing an object being transported by using the lighting module 200 and applying the image acquisition module 250 has been described as an example, but this For better understanding, only one application case is given as an example, but the range of high-speed video recording is not limited by the type of lighting or the number of channels, and can be set freely through software settings.

On the other hand, in the case of each LED light emitting element (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn) of the lighting module 200, high power in the form of a pulse is applied in a short time to allow a large current to flow. If a lot of current flows instantaneously, the brightness of each LED light emitting element (LED1 to LEDn) is also increased by the rate at which the current flows.

In addition, as a method for supplying a large current to each LED light emitting element (LED1 to LEDn), a capacitor for charging is provided on the output side, and the output voltage of the DC-DC converter can be changed by setting control, so that each LED light emitting element A high current circuit can be configured by configuring a circuit with a high voltage capable of supplying sufficient current to (LED1 to LEDn). This method can be used as a function of supplying enough current to the output side or adjusting brightness as needed.

Meanwhile, the user's specific input signal output according to the user's request may be provided through an external terminal and/or the server 700 .

In addition, the control module 350 may perform a function of outputting a specific input signal of a corresponding user according to the request of the corresponding user based on a graphical user interface (GUI).

In addition, the control module 350 may perform high-speed control by using a hardware programming-based Field Programmable Gate Array (FPGA) for a high-speed switching function.

In addition, the control module 350 includes a set value for the target output level of each LED light emitting channel (CH1 to CHn), a set value of output channel selection and order of each LED light emitting channel (CH1 to CHn), and a clock ( Clock) can perform a function of controlling to store at least one set value among set values for generation in a separate storage module 550.

In addition, the control module 350 controls each LED light emitting element (CH1 to CHn) by continuously turning on each LED light emitting element (LED1 to LEDn) provided in each LED light emitting channel (CH1 to CHn) of the lighting module 200. In order to protect the damage, when the high-speed switching operation signal for each LED light emitting channel (CH1 to CHn) of the lighting module 200 is changed, only for a predetermined operation standard time (preferably, about 1 ms) or less. Each of the LED light emitting channels CH1 to CHn of the lighting module 200 may perform a function of controlling high-speed switching.

That is, the control module 350 applies a plurality of semiconductor elements (eg, a buffer, a resistor, a capacitor, etc.) and operates only for a certain time of about 1 ms or less at the moment when the operation signal is changed. By doing so, it can be provided to protect the damage of the lighting due to the continuous turning on of the lighting due to the user's negligence. At this time, among the plurality of semiconductor elements, the capacitor preferably serves to prevent the input of the operating signal from being maintained, and the resistor serves to maintain the operating signal in a low state. Preferably, the maximum pulse input time of the hardware can be determined by adjusting the values of the capacitor and the resistor.

In addition, the control module 350 detects an idle period of a photographing operation for the image acquisition module 250, and enters an idle state when a photographing operation signal of the image acquisition module 250 is not input for more than a preset photographing operation reference time. , and an automatic reset function of removing a state during a photographing operation and initializing it to an initial input state may be performed so that the first state is maintained after the determined idle state.

In addition, the control module 350 is provided in the image acquisition module 250 so that the subject 1 is photographed in line units in a state in which the light irradiated from the lighting module 200 is irradiated to the subject 1 It can perform the function of controlling the operation of each line scan camera.

In addition, the control module 350 operates the image acquisition module 250 and the lighting module so that the camera shutter of the image acquisition module 250 is opened and the light of the lighting module 200 is emitted in synchronization with a preset trigger signal of the camera shutter. It may perform a function of controlling each operation of 200.

In addition, the control module 350 generates a trigger signal of a camera shutter for capturing an image by using the position value of the object transfer module 100, and is synchronized with the generated camera shutter trigger signal to obtain an image acquisition module 250. ) may perform a function of controlling the operation of the image acquisition module 250 and the lighting module 200 so that the lighting of the lighting module 200 is emitted simultaneously with the opening of the camera shutter.

In addition, the control module 350 selectively changes the brightness and color of at least one LED light emitting element provided in the lighting module 200 according to the positional value of the object to be inspected module 100 so that the object to be inspected 1 By performing a function of controlling the operation of the lighting module 200 so that the light is irradiated, the brightness or color of the lighting is changed according to the position of the subject 1 to be inspected to improve inspection performance and reduce the number of additional scans to reduce inspection time. can be shortened effectively.

In addition, the control module 350 receives the ambient temperature value of the lighting module 200 measured from the temperature measurement module 450 and based on this, a preset reference temperature value (preferably, about 75 degrees to about 80 degrees or less) It may perform a function of controlling the operation of the separate temperature control module 500 to maintain.

That is, the control module 350 controls the operation of the temperature control module 500 when the ambient temperature value of the lighting module 200 measured by the temperature measurement module 450 is equal to or greater than the preset reference temperature value, thereby controlling the preset reference temperature value. By setting the temperature below the temperature value, damage to the at least one LED light emitting element provided in the lighting module 200 due to heat generation can be effectively prevented.

In addition, the control module 350 may perform an external inspection of the subject 1 based on the image of the subject 1 obtained from the image acquisition module 250 .

In addition, the external inspection of the subject 1 performed by the control module 350 determines, for example, a good product and a defective product, but the defective product is in at least one surface state among scratches, dents, foreign substances, and/or marking states. classification can be determined.

In addition, the control module 350 compares the difference between the width value of the inspection area to be inspected and the width value of the surrounding area with respect to the inspection area to be referenced for inspection when the external appearance of the object to be inspected 1 is inspected. Depending on the resulting width difference value, it is possible to perform a function of inspecting and determining the coating state of at least one of non-coating, over-coating, disconnection, partial dent, and/or partial extraction of the subject 1.

In addition, the control module 350 extracts information on the width and/or height of the inspection area of the subject 1 from the image of the subject 1 obtained from the image acquisition module 250, and The width and/or height of the inspection area of the subject (1) is compared with the standard width and/or height of the inspection area of the subject (1), and the width and/or height difference between the comparison results is obtained. If the value does not fall within the preset reference width and/or height difference range, a function of determining that the value is defective may be performed.

In addition, the control module 350 sets the width and/or height of a specific inspection area to be inspected in the image of the subject 1 acquired from the image acquisition module 250, and also sets the width and/or height of the subject 1 to be inspected. Set the width and/or height of the surrounding area of the specific inspection area to be referred to for inspection in the image, compare the brightness of the set specific inspection area with the brightness difference of the set surrounding area, and compare the brightness difference value of the comparison result A function of determining an area that does not fall within the preset reference brightness difference range as defective may be performed.

In addition, the control module 350 compares the difference between the width and/or height of the set specific inspection area and the set width and/or height of the surrounding area, and determines the width and/or height difference according to the comparison result. It may perform a function of inspecting and determining the coating state of at least one of non-coating, over-coating, disconnection, partial denting, and/or partial extraction for a specific inspection area of the subject 1.

In addition, the control module 350 transmits at least one information of the image of the subject 1 obtained from the image acquisition module 250 and/or the external examination result information of the subject 1 for each subject to be inspected. It can perform a function of controlling to be stored in a database (DB) and stored in a separate storage module 550.

In addition, the control module 350 transmits at least one information of the image of the subject 1 obtained from the image acquisition module 250 and/or information on the external appearance of the subject 1 to a separate display module. It can perform a function of controlling to be displayed in 600.

In addition, the control module 350 transmits at least one information of the image of the subject 1 obtained from the image acquisition module 250 and/or information on the external appearance of the subject 1 to a separate communication module. Through a wired and/or wireless communication method through 650, a function of controlling transmission to an external terminal and/or server 700 may be performed.

In addition, the control module 350 controls the operation of the lighting module 200 so that the light having each color output from the lighting module 200 is sequentially irradiated to the subject 1, and the lighting module 200 The operation of the image acquisition module 250 is controlled so that the object to be inspected 1 is photographed in a state in which the light having each color output from the inspected object 1 is sequentially irradiated, and from the image acquisition module 250 The entire image having the obtained two-dimensional image of the object under test (1) is provided, and the two-dimensional image of the object under test (1) is separated for each color name using this, and the object under test for each separated color name ( After creating a combined image for each color name by overlapping the two-dimensional images of 1) into one, the generated combined image for each color name and a preset reference image are compared and analyzed to select a color name combination image most similar to the reference image Then, a control function may be performed to perform an external inspection of the subject 1 in a state in which light having a color corresponding to the selected color combination image is irradiated.

That is, the control module 350 transmits light (red (R), green (G), blue (B), white (W), etc.) having each color output from the lighting module 200 at the same location to the subject under test. In a state where the operation is controlled so that the light is sequentially and alternately irradiated to (1), and the light having each color output from the lighting module 200 is sequentially and alternately irradiated to the corresponding subject (1), the subject (1) ) By controlling the operation of the image acquisition module 250 to be photographed, it is possible to acquire the image of the subject 1 photographed in each color in one scan without interference from other lighting and use it for image analysis. Cost and inspection time can be effectively saved by classifying inspection defect types by lighting color and inspecting various defects at once.

Various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to the hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and field programmable gate arrays (FPGAs). , processors, controllers, micro-controllers, microprocessors, and electrical units for performing functions. In some cases, such embodiments may be implemented by control module 350 .

According to software implementation, embodiments such as procedures or functions may be implemented together with a separate software module to perform at least one function or operation. The software code may be implemented by a software application written in any suitable programming language. Also, the software code may be stored in the storage module 550 and executed by the control module 350 .

In addition, the power supply module 400 includes each of the above-described modules, that is, the object transfer module 100, the motor encoder 150, the lighting module 200, the image acquisition module 250, the light quantity measurement module 300, A function of supplying power necessary for the operation of the control module 350, the temperature measurement module 450, the temperature control module 500, the storage module 550, the display module 600, and/or the communication module 650. As a bar, it is desirable to implement commercial alternating current (AC) power (eg, AC 220V or 380V, etc.) to be converted into direct current (DC) and / or alternating current (AC) power for continuous power supply, but limited to this It does not, and can be implemented by including a normal portable battery.

In addition, the power supply module 400 may include a power management unit (not shown) that protects components from external power shock and outputs a constant voltage. The power management unit may include an electro static damage (ESD) protector, a power detector, a rectifier, and a power circuit breaker.

Here, the ESD protector is configured to protect electric components from static electricity or sudden power shock. The power detector is configured to send a cut-off signal to the power circuit breaker when a voltage outside the allowable voltage range is introduced, and transmit a step-up or step-down signal to the rectifier according to a voltage change within the allowable voltage range. The rectifier is configured to perform a step-up or step-down rectification operation according to the signal of the power detector so that a constant voltage is supplied by minimizing fluctuations in the input voltage. The power breaker is configured to cut off power supplied from a battery according to a cutoff signal transmitted from the power detector.

Additionally, the temperature measurement module 450 is mounted in the space O provided in the main body 210 of the lighting module 200, is provided around the lighting module 200, and is connected to the control module 350. It is, and performs a function of measuring the ambient temperature of the lighting module 200 according to the control of the control module 350.

The temperature measuring module 450 may include at least one temperature measuring sensor, and the temperature measuring sensor is a sensor for measuring the temperature in the air, and a thermistor element whose internal resistance value changes according to a change in ambient temperature is used. can The thermistor element may be a negative characteristic thermistor (NTC thermister), a positive characteristic thermistor (PTC thermistor), or a critical characteristic thermistor (CRT).

Such a temperature measuring sensor is preferably configured as a contact temperature sensor using a thermistor element, but is not limited thereto, and may include, for example, a thermocouple sensor, a bimetallic sensor, an IC temperature sensor, and an infrared sensor that is a non-contact sensor.

The temperature control module 500 is connected to the control module 350, and according to the control of the control module 350, the air inside the space part O provided in the main body 210 of the lighting module 200 is directed to the outside. It performs the function of expelling.

The temperature control module 500 includes at least one air discharge passage part 510 and/or at least one air discharge passage part 510 for discharging air inside the space part O provided in the main body 210 of the lighting module 200 to the outside. It may be made including a blowing fan 520 of.

The storage module 550 is connected to the control module 350, and the image of the subject 1 obtained from the image acquisition module 250 under the control of the control module 350, and/or the subject ( 1) Performs a function of converting and storing at least one information of the external appearance inspection result information into a database (DB) for each subject to be inspected.

The storage module 550 may be, for example, a flash memory type, a hard disk type, a multimedia card micro type, or a card type memory (for example, SD or XD memory). etc.), RAM (Random Access Memory, RAM), SRAM (Static Random Access Memory), ROM (Read-Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory), It may include at least one type of storage medium among a magnetic memory, a magnetic disk, and an optical disk.

The display module 600 is connected to the control module 350, and the image of the subject 1 obtained from the image acquisition module 250 under the control of the control module 350, and/or the subject ( 1) performs a function of displaying at least one information of the outer appearance inspection result information on the display screen.

The display module 600 may be, for example, a liquid crystal display (LCD), a light emitting diode display (LED), a thin film transistor liquid crystal display (TFT LCD), an organic light emitting diode (Organic Light Emitting Diode, OLED), Flexible Display, Plasma Display Panel (PDP), Surface Alternate Lighting (ALiS), Digital Light Source Processing (DLP), Liquid Crystal in Silicon (LCoS), Surface Conduction type electron emission display (SED), field emission display (FED), laser TV (quantum dot laser, liquid crystal laser), optoelectric liquid display (FLD), interferometric modulator display (iMoD), thick film dielectric electric (TDEL), It may include at least one of a quantum dot display (QD-LED), a telescopic pixel display (TPD), an organic light emitting transistor (OLET), a laser fluorescence display (LPD), and a 3D display, but is not limited thereto. As long as it can display at least one of external image, text and/or document data or display external image information of the subject 1, it can include anything.

The communication module 650 is connected to the control module 350, and the image of the subject 1 obtained from the image acquisition module 250 under the control of the control module 350, and/or the subject ( 1) performs a function of transmitting at least one of the external appearance inspection result information to an external terminal and/or server 700 through a wired and/or wireless communication method through the communication network 10.

At this time, the communication network 10 is a communication network that is a high-speed backbone network of a large-scale communication network capable of providing large-capacity, long-distance voice and data services, and provides Internet or high-speed multimedia services through Wi-Fi, WiGig, It may be a next-generation wireless communication network including Wibro (Wireless Broadband Internet), World Interoperability for Microwave Access (Wimax), and the like.

The Internet is a TCP / IP protocol and various services existing in the upper layer, that is, HTTP (Hyper Text Transfer Protocol), Telnet, FTP (File Transfer Protocol), DNS (Domain Name System), SMTP (Simple Mail Transfer Protocol), It means a worldwide open computer network structure that provides SNMP (Simple Network Management Protocol), NFS (Network File Service), NIS (Network Information Service), etc. ) provides an environment that allows access to Meanwhile, the Internet may be wired or wireless Internet, or may be a core network integrated with a wired public network, a wireless mobile communication network, or a portable Internet.

If the communication network 10 is a mobile communication network, it may be a synchronous mobile communication network or an asynchronous mobile communication network. As an example of the asynchronous mobile communication network, a wideband code division multiple access (WCDMA) communication network may be used. In this case, although not shown in the drawings, the mobile communication network may include, for example, a Radio Network Controller (RNC) and the like. Meanwhile, although the WCDMA network is taken as an example, it may be a next-generation communication network such as a cellular-based 3G network, an LTE network, a 4G network, a 5G network, and other IP-based IP networks. This communication network 10 serves to mutually transfer signals and data between an external terminal and/or server 700 and the communication module 650 .

On the other hand, the communication network 10 uses, for example, Bluetooth, ZigBee, Beacon, UWB (Ultra Wideband), RFID (Radio Frequency Identification), and/or infrared (IR) communication. A communication method may also be used.

And, the external terminal and / or server 700 transmits a specific input signal of the user for user setting of lighting control according to the user's request through a user setting related application for optical inspection of the inspected object pre-installed through a wired and / or may perform a function of transmitting to the communication module 650 and / or control module 350 wirelessly.

In addition, the external terminal and/or server 700 transmits the image of the subject 1 to be inspected and/or the image of the subject to be inspected 1 transmitted from the communication module 650 through a previously installed application related to the optical inspection of the subject to be inspected. It may perform a function of providing a service so as to retrieve and/or display at least one piece of information among external appearance test result information on a display screen.

On the other hand, the external terminal and / or server 700 applied to an embodiment of the present invention is a smartphone (Smart Phone), smart pad (Smart Pad) or smart note (Smart Note) communicating through the wireless Internet or portable Internet It is preferably composed of at least one mobile terminal device, and in addition, a personal PC, a notebook PC, a Palm PC, a mobile game device (Mobile play-station), a DMB (Digital Multimedia Broadcasting) phone with communication function, and a tablet PC. , iPad, etc. may comprehensively mean all wired and wireless home appliances/communication devices having a user interface for accessing the communication module 600 applied to an embodiment of the present invention.

As shown in FIG. 4, such an external terminal and/or server 700 includes a wireless communication module 710, an audio/video (A/V) input module 720, a user input module 730, and a sensing module. 740, an output module 750, a storage module 760, an interface module 770, a terminal control module 780 and a power module 790 may be included. Meanwhile, since the components shown in FIG. 4 are not essential, the external terminal and/or server 700 may have more or fewer components.

Hereinafter, the components of the external terminal and/or server 700 will be described in detail.

The wireless communication module 710 may include one or more modules enabling wireless communication between an external terminal and/or server 700 and the communication module 650 . For example, the wireless communication module 710 may include a broadcast receiving module 711, a mobile communication module 712, a wireless Internet module 713, a short-distance communication module 714, a location information module 715, and the like.

The broadcast reception module 711 broadcasts signals (eg, TV broadcast signals, radio broadcast signals, data broadcast signals, etc.) and/or broadcasts from an external broadcast management server through various broadcast channels (eg, satellite channels, terrestrial channels, etc.) Receive relevant information.

The mobile communication module 712 transmits and receives a radio signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include a voice call signal, a video call signal, or various types of data according to text/multimedia message transmission/reception.

The wireless Internet module 713 is a module for wireless Internet access, and may be built into or external to an external terminal and/or server 700 . As the wireless Internet technology, for example, WLAN (Wi-Fi), Wibro, Wimax, HSDPA, LTE, and the like may be used.

The short-distance communication module 714 is a module for short-distance communication, for example, Bluetooth communication, ZigBee communication, UWB (Ultra Wideband) communication, RFID (Radio Frequency Identification) communication, or infrared (IR) communication. this can be used

The location information module 715 is a module for confirming or acquiring the location of an external terminal and/or server 700, and uses a Global Position System (GPS) to determine the current location of the external terminal and/or server 700. information can be obtained.

The A/V input module 720 is a module for inputting an audio signal or a video signal, and may basically include a camera unit 721 and a microphone unit 722. The camera unit 721 processes an image frame such as a still image or a moving image obtained by an image sensor in a video call mode or a photographing mode. The microphone unit 722 receives an external sound signal through a microphone in a call mode, a recording mode, or a voice recognition mode, and processes it into electrical voice data.

The user input module 730 is a module through which the user generates input data for controlling the operation of the terminal, and may include, for example, a key pad dome switch, a touch pad (static pressure/static), a jog wheel, and a jog switch.

The sensing module 740 includes the open/closed state of the external terminal and/or server 700, the location of the external terminal and/or server 700, whether or not there is a user contact, a user's touch operation on a specific part, an external terminal and / or the external terminal and / or server 700 by detecting the current state of the external terminal and / or server 700, such as the orientation of the server 700, acceleration / deceleration of the external terminal and / or server 700, etc. ) generates a sensing signal to control the operation of This sensing signal is transmitted to the terminal control module 780, and may be a basis for the terminal control module 780 to perform a specific function.

The output module 750 is a module for generating an output related to sight, hearing or touch, and basically includes a display unit 751, a sound output unit 752, an alarm unit 753, and a haptic unit 754. can

The display unit 751 displays and outputs information processed by an external terminal and/or the server 700 . For example, when the external terminal and/or server 700 is in a call mode, a UI (User Interface) or GUI (Graphical User Interface) related to a call is displayed, and when in a video call mode or shooting mode, shooting and/or reception is performed. Displays a video, UI, or GUI.

The audio output unit 752 may output audio data received from the wireless communication module 710 or stored in the storage module 760 in, for example, a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. .

The alarm unit 753 may output a signal for notifying the occurrence of an event of an external terminal and/or the server 700 . Examples of events generated in the external terminal and/or server 700 include call signal reception, message reception, key signal input, and touch input.

The haptic unit 754 generates various tactile effects that the user can feel. A representative example of the tactile effect generated by the haptic unit 754 is vibration. The strength and pattern of vibration generated by the haptic unit 754 can be controlled.

The storage module 760 may store programs for operation of the terminal control module 780 and may temporarily store input/output data (eg, phonebook, message, still image, video, etc.). The storage module 760 may store data related to vibration and sound of various patterns output when a touch is input on the touch screen.

The storage module 760 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg SD or XD memory, etc.), RAM, SRAM, ROM, EEPROM, PROM, It may include at least one type of storage medium among a magnetic memory, a magnetic disk, and an optical disk.

The interface module 770 serves as a passage between external terminals and/or all external devices connected to the server 700 . The interface module 770 receives data from an external device or receives power and delivers it to an external terminal and/or each component inside the server 700, or transfers data from an external terminal and/or server 700 to an external device. to be sent to the device.

The terminal control module 780 typically controls overall operations of an external terminal and/or server 700, and performs related control and processing for, for example, voice calls, data communications, video calls, and the like.

In addition, the terminal control module 780 controls a specific application program stored in the storage module 760 to be executed, uses the executed specific application service to create various function settings and registration information, etc., and creates them in a wireless communication module. It performs a function of controlling to be transmitted to the communication module 650 through 710.

In addition, the terminal control module 780 may constantly monitor the charging current and charging voltage of the battery unit 795 and temporarily store the monitoring values in the storage module 760 . At this time, the storage module 760 preferably stores battery specification information (product code, rating, etc.) as well as battery charging state information such as the monitored charging current and charging voltage.

The power module 790 receives external power and internal power under the control of the terminal control module 780 and supplies power necessary for the operation of each component. The power module 790 supplies power from the built-in battery unit 795 to each component to operate, and the battery can be charged using a charging terminal (not shown).

Various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to the hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and field programmable gate arrays (FPGAs). , processors, controllers, micro-controllers, microprocessors, and electrical units for performing functions. In some cases, such embodiments may be implemented by the terminal control module 780.

According to software implementation, embodiments such as procedures or functions may be implemented together with a separate software module to perform at least one function or operation. The software code may be implemented by a software application written in any suitable programming language. Also, the software code may be stored in the storage module 760 and executed by the terminal control module 780 .

On the other hand, when the external terminal and/or server 700 is composed of a smartphone, the smartphone freely downloads various application programs desired by the user, unlike a general mobile phone (aka feature phone). It is a phone based on an open operating system that can be used and deleted. It includes not only commonly used functions such as voice/video call and Internet data communication, but also all mobile phones equipped with mobile office functions or those without voice call function but Internet data communication. It is preferable to understand it as a communication device including all accessible Internet phones or tablet PCs.

As such, since the smart phone uses an open operating system, a user can arbitrarily install and manage various application programs unlike a mobile phone having a closed operating system.

Although the preferred embodiment of the control device for the optical inspection of the inspected object according to the present invention has been described above, the present invention is not limited thereto, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to carry out a modification to and this also belongs to the present invention.

100: object transfer module,
150: motor encoder,
200: lighting module,
250: image acquisition module,
300: light quantity measurement module,
350: control module,
400: power supply module,
450: temperature measurement module,
500: temperature control module,
550: storage module,
600: display module,
650: communication module,
700: External terminal and/or server

Claims (33)

An inspection subject transport module for seating and transporting an inspection subject;
A motor encoder for generating a position encoder signal of the inspection object transfer module;
a lighting module for radiating light to a corresponding inspected object transported by the inspected object transfer module;
an image acquisition module for photographing a corresponding object irradiated with light by the illumination module;
a light quantity measuring module provided inside/outside the lighting module and measuring a light quantity value of light emitted from the lighting module; and
The position encoder signal of the object transport module is received from the motor encoder, and based on this, the position value of the object transport module is calculated, and the reference light intensity value of the preset lighting corresponding to the position value of the object transport module is calculated. Based on this, the operation of the lighting module is controlled so that the light is irradiated to the object to be inspected, and the light amount value of the light measured from the light amount measurement module is received, and the measured light amount value corresponds to the position value of the object transport module After comparing the standard light intensity value of the preset lighting and correcting the light intensity value of the lighting so that if they are not the same, the measured light intensity value is equal to the preset reference light intensity value of the lighting corresponding to the position value of the object transport module. , Control the operation of the lighting module so that light is irradiated to the subject based on the corrected light amount value of the lighting, and photograph the subject in a state in which the light output from the lighting module is irradiated to the subject A control device for optical inspection of a subject comprising a control module for controlling the operation of the image acquisition module.
According to claim 1,
The control module controls the output intensity of at least one LED light emitting device included in the lighting module during the exposure time of the camera shutter of the image acquisition module to a preset overdrive constant current value in the form of a pulse signal greater than a rated continuous maximum value. A control device for optical inspection of an object to be inspected, characterized in that the operation of the lighting module is controlled by a constant current over drive control method using pulse control to obtain high luminance brightness.
According to claim 2,
The over-driving constant current value is set in consideration of the cooling time of each LED light emitting element provided in the lighting module between each pulse signal.
According to claim 1,
The lighting module includes a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting element,
The control module sets target output levels of each LED light emitting channel provided in the lighting module and selects an output channel of each LED light emitting channel for high-speed switching control according to a user's specific input signal output according to a user's request. Setting the order and setting the clock (Clock) generation for generating the operation signal of high-speed switching, based on the output level target value of each LED light emitting channel set above, of each LED light emitting element provided in each LED light emitting channel In order to adjust the brightness, a target value of the output voltage of each LED light emitting channel is generated and output, and the output of each LED light emitting channel outputted in synchronization with the setting information and clock information of the output channel selection and order of each LED light emitting channel set above. A control device for optical inspection of an object to be inspected, characterized in that for controlling high-speed switching of each LED light emitting channel provided in the lighting module according to a voltage target value.
According to claim 4,
The control module is a control device for optical inspection of an object to be inspected, characterized in that for outputting a specific input signal of a corresponding user according to a request of the corresponding user based on a graphical user interface (GUI).
According to claim 4,
The control module performs high-speed control using a hardware programming-based FPGA (Field Programmable Gate Array) for a high-speed switching function.
According to claim 4,
The control module may include at least one of a set value for an output level target of each LED light emitting channel, a set value for output channel selection and order of each LED light emitting channel, and a set value for generating a clock. A control device for optical inspection of an object to be inspected, characterized in that for controlling to be stored in a separate storage module.
According to claim 4,
The control module operates a high-speed switching operation for each LED light emitting channel of the lighting module in order to protect each LED light emitting element from being damaged due to the continuous turning on of each LED light emitting element provided in each LED light emitting channel of the lighting module. A control device for optical inspection of an object to be inspected, characterized in that each LED light emitting channel of the lighting module is controlled to be operated at a high speed only for a predetermined operation reference time less than a predetermined operation reference time when the signal is changed.
According to claim 4,
A control device for optical inspection of a subject, characterized in that the user's specific input signal output according to the user's request is provided through an external terminal or server.
According to claim 9,
The external terminal or server transmits the user's specific input signal for user setting of lighting control to the control module wired or wirelessly according to the user's request through a user setting related application for optical inspection of the inspected object pre-installed. A control device for optical inspection of an object to be inspected, characterized in that for transmitting.
According to claim 1,
The control module detects an idle period of a photographing operation for the image acquisition module, determines a time when a photographing operation signal of the image acquisition module is not input for more than a preset photographing operation reference time as an idle state, and determines the idle state. A control device for optical inspection of an object to be inspected, characterized in that it performs an automatic reset function to remove a state during a shooting operation and initialize it to an initial input state so that it is maintained in an initial state after an idle state.
According to claim 1,
The image acquisition module includes at least one line scan camera for obtaining an image having a two-dimensional image by scanning an upper surface image of the object to be inspected in a line unit in a state in which the light emitted from the lighting module is irradiated to the object to be inspected. made up of
The control module controls the operation of each line scan camera so that the object to be inspected is photographed line by line in a state in which the light emitted from the lighting module is irradiated to the object to be inspected. for control devices.
According to claim 1,
The test object is made of a pattern of a display panel or a polyhedron-shaped article having a plurality of faces, a bonding portion between a TFT substrate and a CF (Color Filter) substrate of a display panel, and a drive-IC attached to a TFT substrate of a display panel. (Integrated Circuit), and at least one of the bonded interface between the drive-IC and the printed circuit board (PCB), characterized in that it consists of a silicone or epoxy resin layer having a transparent or translucent characteristic Control device for optical inspection of
According to claim 1,
The control module controls the operation of the image acquisition module and the lighting module, respectively, so that the camera shutter of the image acquisition module is opened and the light of the lighting module is emitted in synchronization with a trigger signal of a preset camera shutter. A control device for optical inspection of a subject to be inspected.
According to claim 1,
The control module generates a trigger signal of a camera shutter for capturing an image using the position value of the object transfer module, and synchronizes with the generated trigger signal of the camera shutter to open the camera shutter of the image acquisition module. A control device for optical inspection of an object to be inspected, characterized in that at the same time, the operation of the image acquisition module and the illumination module are respectively controlled so that the illumination of the illumination module is emitted.
According to claim 1,
The lighting module includes a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting unit,
Each LED light emitting unit provided in each of the LED light emitting channels includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, and blue light emitting element. ), at least one blue LED light emitting element emitting light, and at least one white LED light emitting element emitting white light.
According to claim 16,
Each red LED light emitting element, each green LED light emitting element, each blue LED light emitting element, and each white LED light emitting element provided in each LED light emitting part of each LED light emitting channel are mounted on one LED chip and form a package. A control device for optical inspection of a subject, characterized in that consisting of.
According to claim 1,
The control module selectively changes the brightness and color of at least one LED light emitting element provided in the lighting module according to the position value of the object-to-be-tested transport module to control the operation of the lighting module so that light is irradiated to the object to be inspected. A control device for optical inspection of an object to be inspected, characterized in that for controlling.
According to claim 1,
The lighting module,
A main body constituting an entire body and having a space therein;
a plurality of LED light-emitting channels mounted on one side of the space provided in the main body, operated under the control of the control module, and connected in parallel to each other including at least one LED light-emitting part on a printed circuit board (PCB);
a prism sheet mounted in a space provided in the main body and improving luminance of light emitted by each LED light emitting element provided in each LED light emitting channel;
a condensing lens installed in a space provided in the main body and condensing the light passing through the prism sheet; and
It is mounted in a space provided in the main body, and is fixedly installed on a path identical to or parallel to the path of the light collected by the condensing lens to reflect the light condensed by the condensing lens toward a corresponding object to be inspected and to be inspected. A control device for optical inspection of an object to be inspected, characterized in that it comprises a half mirror that transmits the incident reflected light reflected from the corpse in the direction of the image acquisition module.
According to claim 19,
Each LED light emitting unit provided in each of the LED light emitting channels includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, and blue light emitting element. ), at least one blue LED light emitting element emitting light, and at least one white LED light emitting element emitting white light.
According to claim 20,
Each red LED light emitting element, each green LED light emitting element, each blue LED light emitting element, and each white LED light emitting element provided in each LED light emitting part of each LED light emitting channel are mounted on one LED chip and form a package. A control device for optical inspection of a subject, characterized in that consisting of.
According to claim 19,
In addition to being mounted in the space provided in the main body, it is provided around the lighting module and further includes a temperature measuring module for measuring the ambient temperature of the lighting module,
The control module receives the ambient temperature value of the lighting module measured from the temperature measurement module and controls the operation of a separate temperature control module to maintain a preset reference temperature value based on this. Control device for optical inspection.
23. The method of claim 22,
The control device for optical inspection of the subject, characterized in that the temperature control module is composed of at least one air discharge passage for discharging air inside the space provided in the main body to the outside and at least one blowing fan.
According to claim 1,
The control module performs an external inspection of the object to be inspected based on the image of the object to be inspected obtained from the image acquisition module,
The external inspection of the inspected object performed by the control module is determined as a good product or a defective product, and the defective product is classified into at least one surface state among scratches, nicks, foreign matter, and marking states. Control device for optical inspection of
According to claim 24,
The control module compares the difference between the width value of the inspection area to be inspected and the width value of the surrounding area for the inspection area to be referred to for inspection when the external appearance of the inspection object is inspected, and the width difference value of the comparison result A control device for optical inspection of an object to be inspected, characterized in that for inspecting and determining the coating state of at least one of non-coating, over-coating, disconnection, partial dent, or partial extraction of the object to be inspected according to the method.
According to claim 24,
The control module extracts width/height information of the inspection area of the subject from the image of the subject obtained from the image acquisition module, and determines the width/height of the extracted inspection area of the subject and the The set reference width/height of the inspection area of the inspected object is compared, and if the width/height difference value of the comparison result does not fall within the preset reference width/height difference range, it is judged as defective. Control device for optical inspection.
27. The method of claim 26,
The control module sets the width/height of a specific inspection area to be inspected in the image of the subject obtained from the image acquisition module, and also sets the surroundings of the particular inspection area to be referred to for inspection in the image of the subject. Setting the width/height of the area, comparing the brightness of the set specific inspection area and the brightness difference of the set surrounding area, and determining the area where the brightness difference value of the comparison result does not fall within the preset reference brightness difference range is defective A control device for an optical inspection of an object to be inspected, characterized in that for doing.
According to claim 27,
The control module compares the difference between the width/height of the set specific inspection area and the set width/height of the surrounding area, and based on the width/height difference value of the comparison result, a value for the specific inspection area of the subject to be inspected is determined. A control device for optical inspection of an object to be inspected, characterized in that it inspects and determines the coating state of at least one of coating, overcoating, breakage, partial dent, or partial extraction.
According to claim 24,
The control module converts at least one information of the image of the object to be inspected obtained from the image acquisition module and information on the external appearance of the object to be inspected into a database (DB) for each object to be inspected and stored in a separate storage module. A control device for optical inspection of an object to be inspected, characterized in that for controlling.
According to claim 24,
The control module controls the display of at least one information of the image of the object to be inspected obtained from the image acquisition module and information on the external appearance of the object to be inspected to be displayed on a separate display module. Control device for inspection.
According to claim 24,
The control module transmits at least one information of the image of the object to be inspected obtained from the image acquisition module and information on the external appearance of the object to be inspected through a separate communication module in a wired or wireless communication method to an external terminal or server. A control device for optical inspection of an object to be inspected, characterized in that it is controlled to be transmitted to.
According to claim 31,
The external terminal or server searches or displays at least one information of the image of the subject to be inspected and the external appearance inspection result information of the subject to be inspected transmitted from the communication module through an application related to the optical inspection of the subject to be inspected in advance. A control device for optical inspection of an object to be inspected, characterized in that it provides a service so as to be displayed.
According to claim 1,
The lighting module includes a plurality of LED light emitting channels connected in parallel to each other including at least one LED light emitting unit,
Each LED light emitting unit provided in each of the LED light emitting channels includes at least one red LED light emitting element emitting red light, at least one green LED light emitting element emitting green light, and blue light emitting element. ) At least one blue LED light emitting element emitting light, and at least one white LED light emitting element emitting white light, including LED light emitting elements having at least two colors,
The control module controls the operation of the lighting module so that the light having each color output from the lighting module is sequentially irradiated to the subject to be inspected, and the light having each color output from the lighting module is irradiated to the subject to be inspected in sequence. Controls the operation of the image acquisition module so that the object to be inspected is photographed in the sequentially irradiated state, receives the entire image having the two-dimensional image of the object acquired from the image acquisition module, and uses it to obtain each color color name. A two-dimensional image of the subject is separated for each color name, and a combined image is created for each color name by overlapping the separated two-dimensional images of the subject for each color name. After comparing and analyzing the set reference image to select the color name combination image most similar to the reference image, the external appearance of the subject can be inspected while the light having the color corresponding to the selected color name combination image is irradiated. A control device for optical inspection of an object to be inspected, characterized in that for controlling so as to be.

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