KR20220132291A - Inspecting device for screen of electric device - Google Patents

Abstract

The present invention relates to a screen inspecting device for electronic equipment, capable of accurately inspecting a defect of a screen of electronic equipment by using multiple cameras with different photographing angles in different directions and varying the photographing angle. According to the present invention, the screen inspecting device for electronic equipment includes: a blackout case including an accommodation space; an image photographing unit mounted on the accommodation space of the blackout case, and including multiple cameras photographing the electronic equipment positioned in a photographing area in the accommodation space at multiple photographing angles; and a data processor receiving image data from the image photographing unit and determining a defective state of the electronic equipment by processing the received image data. The image photographing unit performs a photographing motion while the electronic equipment performs a light emitting motion. The image photographing unit includes: a first camera photographing the screen of the electronic equipment at the photographing angle vertical to the screen of the electronic equipment; and a second camera photographing the screen of the electronic equipment obliquely in one or more directions of four directions of the screen of the electronic device.

Description

Screen inspection device for electronic devices

The present invention relates to a screen inspection apparatus for an electronic device, and more particularly, by using a plurality of cameras having different photographing angles in different directions and varying the photographing angles, an electronic device capable of more accurately inspecting screen defects of electronic devices. It relates to a device screen inspection device.

With the development of the IT industry, as the use of portable electronic products such as smart phones and tablet PCs and home appliances such as LCD monitors and TVs increases, research on displays according to various types and sizes is being actively pursued.

If foreign substances or stains are included on the display surface, since the light generated from the backlight module is distorted, it progresses to the commercialization stage and when the user uses it, the display screen becomes blurry or blurs. -uniformity) appears, resulting in poor product quality and inconvenience to users, and at the same time there is no repair method, so it is important to inspect the quality of the display surface in the manufacturing process. Therefore, it is necessary to reliably check the mura of the display surface before leaving the factory.

In this case, stains may occur due to many reasons, such as dust or foreign substances during the manufacturing process, scratches due to carelessness of the inspector, fingerprints, and the like. Until now, defects were determined by directly inspecting the stains on the display film with the naked eye.

To overcome these shortcomings, the importance of machine vision systems that automatically detect spots using image processing is increasing. A machine vision system is a system that automatically inspects the display surface. It is a system that takes an image of the product to be inspected with a computer rather than a person and takes the image of the product to be inspected and brings it to the computer. The display surface is automatically inspected through the image analysis stage, which determines whether the product to be inspected has defects based on the image processing stage and the image processing result.

Conventional inspection apparatuses use a line scan camera or an area camera to inspect foreign substances or inspect print defects or dimensions, but it is insufficient to inspect the overall defects of the product.

An object of the present invention is to provide a screen inspection apparatus for an electronic device capable of more accurately inspecting a screen defect of an electronic device by using a plurality of cameras having different shooting angles in different directions and varying the shooting angles. do.

A screen inspection apparatus for an electronic device according to the present invention includes a blackout case having an accommodating space, a plurality of cameras mounted in the accommodating space of the blackout case, and photographing an electronic device positioned in a photographing area in the accommodating space at a plurality of shooting angles. and a data processor for receiving image data from the image capturing unit and processing the received image data to determine a defective state of the electronic device, wherein the image capturing unit captures images while the electronic device performs a light-emitting operation The operation is performed, and the image capturing unit tilts the screen of the electronic device in at least one direction from among the first camera for photographing the screen of the electronic device at a shooting angle perpendicular to the screen of the electronic device, and at least one of the four directions of the screen of the electronic device. It is configured to include a second camera for taking pictures.

In addition, it is preferable that the screen inspection apparatus includes an angle adjusting unit for changing a photographing angle by moving at least one of the plurality of cameras.

In addition, it is preferable that the angle adjusting unit moves the camera while maintaining a constant distance between the camera and the photographing area.

In addition, the angle adjusting unit is preferably controlled by a data processor or controlled manually.

In addition, it is preferable that the data processor controls the angle adjusting unit using photographing angle information according to the type or size of the electronic device.

According to the present invention, by taking an image vertically and obliquely with respect to the screen of the electronic device during the self-luminous operation of the electronic device, not only defects near the edge of the screen but also defects in light emission can be checked, and the shooting angle is variable and shooting at various angles There is an effect that can determine the defect of the electronic device using the

1 is an arrangement structure of cameras of a screen inspection apparatus of an electronic device according to the present invention.
2 is a block diagram of a screen inspection apparatus for an electronic device according to the present invention.

Hereinafter, the present invention will be described in detail through examples and drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that various modifications, equivalents, and/or alternatives of the embodiments of the present invention are included. In connection with the description of the drawings, like reference numerals may be used for like components.

In this document, expressions such as "have", "may have", "includes", or "may include" refer to the presence of a corresponding characteristic (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

In this document, expressions such as “A or B”, “at least one of A or/and B”, or “one or more of A or/and B” may include all possible combinations of the items listed together. . For example, "A or B", "at least one of A and B", or "at least one of A or B" means (1) includes at least one A, (2) includes at least one B; Or (3) it may refer to all cases including both at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" used in this document may modify various elements, regardless of order and/or importance, and may modify one element to another. It is used only to distinguish it from the components, and does not limit the components. For example, the first user equipment and the second user equipment may represent different user equipment regardless of order or importance. For example, without departing from the scope of rights described in this document, a first component may be referred to as a second component, and similarly, the second component may also be renamed as a first component.

A component (eg, a first component) is "coupled with/to (operatively or communicatively)" to another component (eg, a second component) When referring to "connected to", it should be understood that the certain element may be directly connected to the other element or may be connected through another element (eg, a third element). On the other hand, when it is said that a component (eg, a first component) is "directly connected" or "directly connected" to another component (eg, a second component), the component and the It may be understood that other components (eg, a third component) do not exist between other components.

The expression "configured to (or configured to)" as used in this document, depending on the context, for example, "suitable for", "having the capacity to" It can be used interchangeably with "," "designed to", "adapted to", "made to", or "capable of". The term "configured (or set up to)" may not necessarily mean only "specifically designed to" in hardware. Instead, in some circumstances, the expression “a device configured to” may mean that the device is “capable of” with other devices or parts. For example, the phrase "a processor configured (or configured to perform) A, B, and C" executes a dedicated processor (eg, an embedded processor), or one or more software programs stored in a memory device, to perform the corresponding operations. By doing so, it may mean a generic-purpose processor (eg, a CPU or an application processor) capable of performing corresponding operations.

Terms used in this document are only used to describe specific embodiments, and may not be intended to limit the scope of other embodiments. The singular expression may include the plural expression unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meanings as commonly understood by one of ordinary skill in the art described in this document. Among the terms used in this document, terms defined in a general dictionary may be interpreted with the same or similar meaning as the meaning in the context of the related art, and unless explicitly defined in this document, have an ideal or excessively formal meaning. not interpreted In some cases, even terms defined in this document cannot be construed to exclude embodiments of this document.

1 is an arrangement structure of cameras of a screen inspection apparatus of an electronic device according to the present invention.

The screen inspection apparatus includes a plurality of cameras (C, L1, L2, R1, R2, T1, T2, T1, T2, B1, B2) is provided with an image capturing unit. The blackout case has an accommodating space and an inlet for inserting and withdrawing the electronic device 20 into and out of the accommodating space, and a support surface (G) which is a conveyor belt on which the electronic device 20 is seated and transported into the accommodating space through the inlet. ) is located.

The screen of the electronic device 20 is arranged in the photographing area P of the image capturing unit by the conveyor device. In the present invention, the electronic device 20 is a device having a screen for display on at least one side thereof, and includes, for example, a mobile phone, a smart phone, a tablet PC, and the like.

The image capturing unit is positioned above the support surface G while the screen of the electronic device 20 is located in the photographing area P, and the screen of the electronic device 20 performs a light emitting operation, so that the image capturing unit is positioned at a plurality of photographing angles. The screen of the electronic device 20 is photographed. The image capturing unit includes a camera C that takes pictures at a shooting angle of 90° perpendicular to the support surface G from the upper side of the screen of the electronic device 20, and four directions of the screen of the electronic device 20 (for example, Cameras (L1, L2), cameras (R1, R2), cameras (T1, T2) and cameras B1 and B2. In each direction, each of the cameras L1, R1, T1, B1 shoots the screen at a shooting angle (first angle) within the high angle shooting angle range (30° to 75°), and the cameras L2, R2, T2, B2) Each shoots the screen at a shooting angle (second angle) within the low angle shooting angle range (15° to 60°). In another embodiment, in each direction, cameras for photographing the screen at a photographing angle other than the high angle and the low angle may be additionally provided.

The cameras (C, L1, L2, R1, R2, T1, T2, B1, B2) included in the image capturing unit are spaced apart from the photographing area P (or the center of the photographing area P) by the same distance, and the blackout case installed in the receiving space of In addition, in order to vary the shooting angle as shown in FIG. 1, each of the cameras L1, R1, T1, B1 mounted in each of the four directions of the shooting area P is a shooting area P (or a shooting area ( It is movable along the first movement path S1 while maintaining the distance from the center of P), and each of the cameras L2, R2, T2, B2 maintains the distance from the center of the photographing area P while maintaining the 2 It is possible to move along the movement path S2.

2 is a block diagram of a screen inspection apparatus for an electronic device according to the present invention.

The screen inspection apparatus includes a display unit 1 that displays whether the screen of the electronic device 20 is in a bad state (eg, normal, bad, etc.), and input from an operator (eg, inspection start/end, images). An input unit 3 for obtaining a variable input of a photographing angle of a photographing unit, a size or type of an electronic device to be inspected, etc.) and applying it to the data processor 9, and a plurality of cameras (C, L1, L2, R1, R2, T1) , T2, B1, B2), the image capturing unit for transmitting the captured image data to the data processor 9, and electrically connecting between the image capturing unit and the data processor 9, the image data from the image capturing unit a connection unit 5 for applying to the data processor 9, an angle adjustment unit 7 for adjusting the shooting angle of at least one camera among the image capturing unit, and the above-described components (display unit 1, input unit ( 3), by controlling the angle adjusting unit 7, the image capturing unit, etc.) to analyze the image data transmitted from the image capturing unit, check the defective state of the screen of the electronic device 20, and determine whether it is defective, and display unit ( The data processor 9 and the like indicated in 1) are included. However, the power supply unit (not shown), the display unit 1, the input unit 3, the connection unit 5, etc. are only technologies that are naturally recognized by those skilled in the art to which the present invention belongs, and detailed descriptions thereof are omitted. .

The image capturing unit may perform an image capturing operation under the control of the data processor 9 , and the conveyor device transfers the electronic device 20 and places the electronic device 20 in the capturing area P and then applies an image capturing control command to the image capturing unit By doing so, an image capturing operation may be performed. 1 , the cameras L1, L2, R1, R2, T1, T2, B1, and B2 shoot the electronic device 20 (the screen of the electronic device 20) at an oblique shooting angle, so that the edge Image data for checking a defective state (eg, foreign matter, stain, color defect or color irregularity of the screen) on the screen having a round shape may be applied to the data processor 9 .

The angle adjusting unit 7 adjusts the shooting angle of the camera of the image capturing unit under the control of the data processor 9 or by the manual control of the operator, but maintains a constant interval between each camera and the capturing area (center of the capturing area). It corresponds to a configuration in which the shooting angle is varied by moving the camera while maintaining it. The angle adjusting unit 7 includes, for example, a guide unit that provides the first or second movement paths S1 and S2, and a power unit (eg, a motor, etc.) that forcibly moves the camera along the guide unit. can be composed of

The data processor 9 is a processor (eg, CPU, MCU, MICROPROCESSOR, etc.) that performs a process of acquiring image data from the image capturing unit, and determining whether a defective state by processing and analyzing the acquired image data. and a storage space (eg, a memory, etc.) for storing image data from the image capturing unit and angle setting data for controlling the angle adjusting unit 7 .

The angle setting data may include photographing angle information of the camera including the photographing angle of the camera according to the type or size of the electronic device 20 , and the data processor 9 may include the angle adjusting unit 7 according to the angle setting data. ) to adjust the shooting angle of at least one or more cameras of the image capturing unit.

An image data acquisition process performed by the data processor 9 will be described. The image capture unit performs a photographing operation while the screen of the electronic device 20 is positioned in the photographing area and the electronic apparatus 20 performs a light-emitting operation. Since the electronic device 20 is located in the blackout case, the light emission operation must be performed independently or under the control of the data processor 9, and the light emission operation applies power to the screen (or screen panel) and, for example, light The three primary colors of red, green, blue, white and gray and colors according to a preset pattern are sequentially turned on and emitted, and when the sequential lighting is performed, the image capturing unit performs a photographing operation. That is, the image capturing unit acquires an image of the self-luminous state of the electronic device 20 , and no other lighting device is required.

The image capturing unit applies the captured image data to the data processor 9 through the connection unit 5 .

The data processor 9 receives the image data, separates the color, saturation, and brightness of the image (image) included in the image data from the camera C, recombines the separated color, saturation, and brightness, and processes the image. It is determined whether there are non-uniform areas (eg, blotches, color blotches), that is, there is a defective state. If there is a non-uniform area, the data processor 9 determines that there is a defect on the screen of the electronic device 20 and displays the defective state on the display unit 1 . Otherwise, the data processor 9 determines that it is normal (good product) and displays the normal (good product) state on the display unit 1 . However, since these image processing and determination processes correspond to techniques widely known to those skilled in the art to which the present invention pertains, a detailed description thereof will be omitted.

The image included in the image data from each of the cameras ((L1, L2, R1, R2, T1, T2, B1, B2) is curved, unlike the image (without warping) included in the image data from the camera C. Therefore, the data processor 9 first performs warping processing on the image included in the image data, and then separates the color, saturation, and brightness of the image (image), and separates the color and saturation. , the brightness is recombined and image processing is performed to determine whether there is a non-uniform area (for example, a stain), that is, a defective state. It is determined that there is a defect in the phase, otherwise the data processor 9 determines that it is normal (good product).

The screen inspection apparatus according to the present invention can check not only defects in the vicinity of the screen edge but also defects in light emission, etc.

As described above, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains can use various methods without departing from the gist of the invention as claimed in the claims. It goes without saying that modifications are possible, and such modifications are intended to be within the scope of the claims.

1: display unit 3: input unit
5: Connection part 7: Angle adjustment part
9: Data Processor

Claims (5)

a blackout case having an accommodation space;
an image photographing unit mounted in the accommodation space of the blackout case and including a plurality of cameras for photographing electronic devices positioned in photographing areas within the accommodation space at a plurality of photographing angles;
A data processor for receiving image data from the image capturing unit and processing the received image data to determine a defective state of the electronic device,
The image capturing unit performs a photographing operation while the electronic device performs a light-emitting operation,
The image capturing unit includes a first camera for photographing the screen of the electronic device at a photographing angle perpendicular to the screen of the electronic device, and a second camera for photographing the screen of the electronic device inclined in at least one direction among four directions of the screen of the electronic device. Screen inspection apparatus of an electronic device, characterized in that it comprises a. The method of claim 1,
The screen inspection apparatus of an electronic device, characterized in that it comprises an angle adjusting unit for changing the photographing angle by moving at least one of the plurality of cameras. 3. The method of claim 2,
The angle adjusting unit moves the camera while maintaining a constant distance between the camera and the photographing area. The method of claim 1,
The angle adjusting unit is controlled by a data processor or manually controlled. 5. The method of claim 4,
The data processor controls the angle adjusting unit using photographing angle information according to the type or size of the electronic device.

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