KR20170099198A - Inspection equipment for back light unit - Google Patents
Inspection equipment for back light unit Download PDFInfo
- Publication number
- KR20170099198A KR20170099198A KR1020160021274A KR20160021274A KR20170099198A KR 20170099198 A KR20170099198 A KR 20170099198A KR 1020160021274 A KR1020160021274 A KR 1020160021274A KR 20160021274 A KR20160021274 A KR 20160021274A KR 20170099198 A KR20170099198 A KR 20170099198A
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- KR
- South Korea
- Prior art keywords
- backlight unit
- inspection
- moving
- moving jig
- pressure
- Prior art date
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The present invention relates to a backlight unit inspection apparatus, and more particularly, to a moving jig on which a backlight unit is seated; A position moving device for moving the moving jig to be positioned at an arbitrary inspection position; A pressing device for pressing the backlight unit by supplying a pneumatic pressure into the closed inner space, forming a space in a closed state in which the backlight unit is positioned inside the upper surface of the moving jig moved to the first inspection position through the position moving device, ; An inspection camera for photographing the backlight unit pressed by the pressure device; And a control device for controlling each operation of the position moving device, the pressure device, and the inspection camera.
Accordingly, it is an object of the present invention to provide an apparatus and a method for confirming or more accurately detecting defective elements that have not been detected in a vision inspection process of a backlight unit placed at atmospheric pressure, and at the same time, The cause of the occurrence can be fundamentally solved.
Description
The present invention relates to an inspection apparatus for a backlight unit.
BACKGROUND ART [0002] A variety of electronic devices including a liquid crystal display device capable of displaying a screen, such as a cellular phone, a display panel, and the like are equipped with a backlight unit for diffusing and illuminating light.
The surface state of each of the various film sheets constituting the backlight unit through a separate inspection process of the assembled backlight unit to perform such a function. Defects and defects are checked by confirming the state of lamination between the sheets and the light-supplying performance inhibiting factors such as foreign matter or air introduced in the lamination process.
In the inspection process of the backlight unit, various defects are confirmed by acquiring an image by photographing the state of the backlight unit by using the vision camera device, and checking various defects. The top surface of the backlight unit placed at atmospheric pressure state is photographed There is a problem that certain defective elements are not specified in confirming defects.
Accordingly, an inspection process for detecting a specific defective element by using an inspection camera after the backlight unit is directly pressurized by an operator on the upper surface and the degree of contact between the laminated films and the degree of planarity is further improved. However, As the operator has to control the inspection process directly, the efficiency and the degree of the result are not constant and the worker's condition is affected.
Efforts have been made to automate and mechanize the pressurization of the backlight unit in the pressure inspection process in order to solve this problem. Prior art documents related to the related arts include Korean Patent Application No. 10-2011-0138497 entitled "Backlight Unit Inspection Device "(hereinafter referred to as " prior art ").
However, in the case of backlight unit pressure inspection devices including the prior art. In order to increase the airtightness of the space by pushing a part of the top surface of the uppermost side of the film laminate structure including the outside of the mold frame of the backlight unit to form a closed space and pressing the space, Or more of the total thickness of the backlight unit, and as a result, there is a problem that the laminated structure of the laminated film is changed in the pressing and squeezing release process, or it acts as a force for causing a defect in a certain part of the whole backlight unit.
In addition, considering such a problem, if the degree of the external force applied to the pressing is lowered, a sufficient space is not sealed, thereby reducing the accuracy and precision of the pressure inspection, and the inspection process of the backlight unit separates the backlight unit and the protective sheet The leakage of the air pressure due to the insufficient degree of sealing has a problem of changing the seating position of the protective sheet.
It is an object of the present invention to provide a backlight unit which is capable of detecting a defect through an inspection camera by applying a certain level of pressure to the backlight unit, And to provide a technique for identifying a specific defect element through automation and mechanization in a state where the degree of tie-up is increased.
It is another object of the present invention to provide a backlight unit which is capable of automatically exerting an external force through direct contact with a backlight unit, And to provide a technique capable of eliminating the occurrence of structural and mechanical defects of the backlight unit by the light emitting diode.
In order to solve the above problems, the present invention has been developed to solve the above-mentioned problems. In the inspection process of the backlight unit, the protective sheet, which is separated from the backlight unit and placed on the upper surface of the same jig, So as to prevent any error from occurring when the inspection is completed and then reattached.
According to an aspect of the present invention, there is provided an apparatus for inspecting a backlight unit including: a movable jig having a backlight unit; A position moving device for moving the moving jig to be positioned at an arbitrary inspection position; A pressing device for pressing the backlight unit by supplying a pneumatic pressure into the closed inner space, forming a space in a closed state in which the backlight unit is positioned inside the upper surface of the moving jig moved to the first inspection position through the position moving device, ; An inspection camera for photographing the backlight unit pressed by the pressure device; And a control device for controlling each operation of the position moving device, the pressure device, and the inspection camera.
Here, the pressure device may include: a pressing body having an open mouth communicating with the inner space on one side of the moving jig, the other side of the inspection camera being covered with a transparent material; A pressing body mover for adjusting a phase of the pressing body; And a pneumatic pressure generator connected to the inner space of the pressure body to provide a predetermined air pressure to the inner space of the pressure body, wherein a size of an opening on one side of the pressure body is larger than a frame size of the backlight unit, When one side of the pressing body is pressed to the moving jig side through the pressing body moving device, one side of the pressing body is pressed against the upper surface of the moving jig to seal the inner space of the pressing body.
The moving jig may include: a first seating part having a seating groove for seating the backlight unit; And a lighting unit for applying power to the light emitting device of the backlight unit that is seated on the first seating unit, wherein the one side of the pressing body is positioned on the seating groove rim of the first seating unit, And controls the pressing body mover so that the pressing body contact with the outer peripheral portion.
Here, the control device controls the lighting unit so that the inspection camera can photograph the backlight unit, which has been pressed by the pressing device, in a lighted state.
The first seating part is provided with a plurality of first vacuum holes capable of fixing the backlight unit through vacuum suction, and the backlight unit testing device includes a first vacuum hole on the first seating part of the moving jig, And a first adsorption module for generating a connected pneumatic pressure.
The moving jig may further include a second seat on which a protective sheet attached to the backlight unit is seated and includes a plurality of second vacuum holes capable of fixing the seated protective sheet by vacuum suction, The backlight unit inspection apparatus further includes a second adsorption module connected to the second vacuum hole on the second seating portion of the moving jig to generate a vacuum pressure.
The backlight unit inspection apparatus includes: Further comprising an inspection unit provided in at least one or more inspection apparatuses for inspecting additional defects and defects of the backlight unit that has been inspected in the state of being pressurized through the pressurizing apparatus and the inspection camera, The control unit controls the position moving device so that the moving jig on which the backlight unit having been inspected is mounted moves to each of the other inspection positions.
The present invention has the following effects.
First, in confirming various defects of the backlight unit placed on the moving jig through the inspection camera, the backlight unit is pressed through the pressurizing unit in a closed space to form a tangential It is possible to check defective elements which are not detected in the vision inspection process of the backlight unit placed at atmospheric pressure or to confirm the defect elements more accurately.
Secondly, in order to perform the pressing of the backlight unit, the pressing device moves to the moving jig side so that the backlight unit is positioned in the inner space of the pressing body. In the pressing process, It is possible to prevent direct contact between the one side of the pressurized body and the backlight unit and generation of external force.
Thirdly, only a pressing effect of the laminated structure in the backlight unit due to the air pressure is provided, and it can be induced as a direct external force of the backlight unit is applied due to no external force generated by pressing on a part of the backlight unit by the pressing body The factors of occurrence of the laminated structural or mechanical defects can be fundamentally solved.
Fourthly, in order to prevent leakage of air pressure from the main body of the pressurizing process in the pressurizing process, or to remove the backlight unit from the jig during the movement of the jig for further inspection process, The position of the seat can be fixed.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a compression type of a pressing jig of a pressing body by operation of a pressing device according to the present invention, with reference to a width direction of the moving jig.
FIG. 2 is a view showing the compression type of the pressing jig of the pressing body by the operation of the pressing device of the present invention with reference to the longitudinal direction of the moving jig.
3 is a plan view showing the structure of a pressurized body in the pressurizing device of the present invention.
4 is a conceptual view for explaining a squeezing area for forming a closed space of the pressing body by the operation of the pressing device of the present invention.
5 is a side view showing a first inspection position part of the backlight unit inspection apparatus of the present invention.
6 is a plan view showing a backlight unit inspection apparatus of the present invention.
The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which the technical parts already known will be omitted or compressed for the sake of brevity.
<Description of Components of Backlight Unit Inspection Device>
Referring to FIGS. 1 to 5, the backlight
The
The moving
This is because the protective sheet S must be separated from the backlight unit B in order to perform the inspection process and when the backlight unit B is provided to the outside after the inspection process is completed, The moving
A plurality of
5, the backlight unit B placed in the
A flexible material application portion having a wire structure connected to a light emitting element such as an LED element of the backlight unit B placed on the peripheral portion of the
The
The
6, the moving
Further, the
First, the apparatuses constituting the present invention at the first inspection position TP1 in which a vision inspection through pressure is performed will be described. The
The
As a result, the various film layers constituting the film laminate structure of the backlight unit (B) are more closely adhered to each other, so that the degree of contact is higher than that at the atmospheric pressure, and the vision inspection in such a state is carried out by a vision inspection It is possible to detect even defective elements that are not identified or detected to a low degree.
The moving
The operations of the
Here, the pressurizing
The pressurizing
The
1 and 2, the
The open space of one
The size of the opening H in which a center portion of the one
This is achieved by moving the
That is, a region where one
The backlight unit B is placed in the
In any case, this structural feature does not directly damage the surface of the film due to direct contact with the backlight unit (B) or affect the deformation of the laminate structure between the films or cause damage to certain parts.
At least one transparent cover member C is provided on the
4, a
Next, the
For this, a plurality of air inlets (AH) communicating with the air pressure generator (330) and one side are connected to the inner space (AT) along the rim of the pressure body (310).
As shown in FIG. 3, the plurality of air inlets AH are arranged symmetrically with respect to the length and width direction of the body, so that the air supplied to the inside of the air inlets AH is balanced As shown in Fig.
This is to solve the problem that the distribution of the region to be pressed on the upper surface of the backlight unit B is not balanced and deflected to one side at the initial stage of air pressure supply as air is injected from one direction into the inside.
In the inspection process in which the
As shown in FIG. 5, the
The pressing
This is a safety device for fixing the seating position of the protective sheet S without being influenced even when a slight amount of air is released from the
This is the same as the
The
Therefore, the backlight
The
Next, the
The
6, the moving
After that, the moving
This is the configuration and arrangement of the inspection unit according to one embodiment, but it is not limited thereto and various designing devices such as a series of design changes are possible.
The moving
When the process of reattaching the protective sheet S is completed, the moving
The embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection is to be construed in accordance with the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.
1000: backlight unit inspection device
100: Moving jig
110: first seat portion 115: seat groove
110H: first vacuum hole
120:
130:
200: Position shifting device
300: Pressure device
310: Pressurizing body 320: Pressurized body moving device
330: Air pressure generator
400: Inspection camera
500: control device
600: Adsorption module
610: first adsorption module 620: second adsorption module
700: Inspection unit
710: first inspection apparatus 720: second inspection apparatus
730: third inspection device 740: fourth inspection device
800: Device for attaching protective sheet
900: Backlight unit detachment device
B: Backlight unit
S: Protective sheet
Claims (7)
A position moving device for moving the moving jig to be positioned at an arbitrary inspection position;
A pressing device for pressing the backlight unit by supplying a pneumatic pressure into the closed inner space, forming a space in a closed state in which the backlight unit is positioned inside the upper surface of the moving jig moved to the first inspection position through the position moving device, ;
An inspection camera for photographing the backlight unit pressed by the pressure device; And
And a control device for controlling each operation of the position moving device, the pressure device, and the inspection camera
Backlight unit inspection device.
The pressure-
A pressing body formed on one side surface of the moving jig and having an opening communicating with the inner space, the other side of the inspection camera being covered with a transparent material;
A pressing body mover for adjusting a phase of the pressing body; And
And an air pressure generator connected to the internal space of the pressurized body to provide a predetermined air pressure to the internal space of the pressurized body,
Wherein a size of the opening on one side of the pressing body is larger than a frame size of the backlight unit so that when one side of the pressing body is pressed to the side of the moving jig through the pressing body moving unit, So as to seal the inner space of the pressing body by being pressed against the upper surface of the moving jig
Backlight unit inspection device.
The moving jig includes:
A first seating part having a seating groove for seating the backlight unit; And
And a lighting unit for applying power to the light emitting device of the backlight unit seated on the first seating unit,
Wherein the control device controls the pressing body moving device so that one side of the pressing body is in contact with the outer periphery of the seating groove outside the seating groove of the first seating part of the moving jig,
Backlight unit inspection device.
Wherein the control device controls the lighting unit so that the inspection camera can photograph the backlight unit, which has been pressed by the pressure device, in a lighted state
Backlight unit inspection device.
Wherein the first seat portion is provided with a plurality of first vacuum holes capable of fixing the backlight unit through vacuum suction,
The backlight unit inspection apparatus includes:
And a first adsorption module connected to the first vacuum hole on the first seating part of the moving jig to generate a vacuum pressure,
Backlight unit inspection device.
The moving jig includes:
And a second seat having a plurality of second vacuum holes on which a protective sheet attached to the backlight unit is seated and capable of fixing the seated protective sheet through vacuum suction,
The backlight unit inspection apparatus includes:
And a second adsorption module connected to the second vacuum hole on the second seating portion of the moving jig to generate a vacuum pressure.
Backlight unit inspection device.
The backlight unit inspection apparatus includes:
Further comprising an inspection unit provided in at least one or more inspection apparatuses for inspecting additional defects and defects of the backlight unit that has been inspected in the state of being pressurized through the pressurizing apparatus and the inspection camera,
Wherein the control device controls the position moving device so that the moving jig that places the backlight unit that has been inspected from the first inspection position moves to each of the remaining inspection positions
Backlight unit inspection device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160021274A KR20170099198A (en) | 2016-02-23 | 2016-02-23 | Inspection equipment for back light unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160021274A KR20170099198A (en) | 2016-02-23 | 2016-02-23 | Inspection equipment for back light unit |
Publications (1)
Publication Number | Publication Date |
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KR20170099198A true KR20170099198A (en) | 2017-08-31 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020160021274A KR20170099198A (en) | 2016-02-23 | 2016-02-23 | Inspection equipment for back light unit |
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KR (1) | KR20170099198A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230072122A (en) | 2021-11-17 | 2023-05-24 | 다래비젼주식회사 | Backlight vacuum adsorption module |
KR20230080934A (en) | 2021-11-30 | 2023-06-07 | 다래비젼주식회사 | Inspection Apparatus for Backlight vacuum adsorption module |
KR20230090802A (en) | 2021-12-15 | 2023-06-22 | 다래비젼주식회사 | Auto Inspection Apparatus for Backlight vacuum adsorption module and its method |
-
2016
- 2016-02-23 KR KR1020160021274A patent/KR20170099198A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230072122A (en) | 2021-11-17 | 2023-05-24 | 다래비젼주식회사 | Backlight vacuum adsorption module |
KR20230080934A (en) | 2021-11-30 | 2023-06-07 | 다래비젼주식회사 | Inspection Apparatus for Backlight vacuum adsorption module |
KR20230090802A (en) | 2021-12-15 | 2023-06-22 | 다래비젼주식회사 | Auto Inspection Apparatus for Backlight vacuum adsorption module and its method |
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