KR101975314B1 - Inspection apparatus for display panel - Google Patents

Abstract

The present invention provides an inspection device for a display panel, in which an image capturing unit and an arrangement camera are installed at a lower part of a support plate to capture images of electrodes of the display panel and terminal portion of a test unit for analyzing whether the display panel is arranged, thereby being capable of remarkably enhancing inspection efficiency as well as largely reducing a display panel arrangement error. In addition, the present invention moves and arranges the display panel in a state of being levitated through pressure of air discharged through air holes of the support plate to more greatly enhance arrangement efficiency and prevent damage to the display panel due to contact between a fixation unit and display panel through a first pressing member and second pressing member.

Description

[0001] Inspection apparatus for display panel [

The present invention relates to a display panel inspecting apparatus, and more particularly, to an apparatus and method for inspecting a display panel by arranging an alignment camera at a lower portion of a receiving plate together with an image sensing unit, imaging electrodes of a display panel and terminal portions of a test unit, The present invention relates to an inspection apparatus for a display panel capable of greatly reducing an alignment error of a display panel and thereby greatly improving inspection efficiency.

The OLED display panel used as a flat panel display device has advantages of wide viewing angle, excellent contrast and high response speed, and is widely used not only in portable display devices, smart phones, tablet PCs, but also as a next generation display device It is attracting attention.

Particularly, the OLED display panel is excellent in characteristics such as luminance, driving voltage, response speed, and the like, and is capable of multi-coloring as compared with an inorganic light emitting display device.

In the manufacturing process of such an OLED display panel, a TFT (Thin Film Transistor) layer is formed on a substrate through various thin film formation processes and etching processes, and on the TFT layer, a lower electrode and an organic layer (e.g., a hole transport layer, An electron transport layer) and an upper electrode are formed. Then, the substrate on which the TFT layer and the organic light emitting layer are formed is sealed using an encapsulation substrate to complete the OLED display panel.

Thereafter, an inspection process for OLED cells formed on the substrate of the OLED display panel may be performed. In the inspection process, an inspection signal is applied to the OLED cells to perform a function test of the TFT layer, a correction circuit test, , Image inspection and surface foreign matter inspection, and various equipment for each inspection process are being developed.

1 is a view showing a conventional inspection apparatus for a display panel.

1, a conventional display panel inspection apparatus 100 includes a main body 110, a support plate 120 installed on one side of the main body 110 and having a display panel D on an upper surface thereof, A test unit 130 installed on one side of the main body 110 and electrically connected to the display panel D and a test unit 130 electrically connected to the test panel 130 on the upper surface of the base plate 120 in electrical contact with the test unit 130. [ A fixing unit 150 installed on one side of the main body 110 and fixing the display panel mounted on the upper surface of the supporting plate 120, a camera 150 mounted on the upper side of the receiving plate 120, A lighting unit 170 installed at one side of the main body 110 for illuminating the supporting plate 120 and a discriminating unit for discriminating whether or not the display panel D is defective by analyzing the image acquired from the camera 160 180).

In the conventional display panel inspection apparatus 100, the loading unit 140 removes the display panel D supplied from the outside from the upper surface of the receiving plate 120 at a predetermined position, that is, When the terminals of the test section 130 are loaded in mutual contact with each other, the fixing unit 150 presses and fixes one side of the display panel D, and the camera 160 picks up an image of the display panel D , The judging unit 180 checks the lighting of the display panel D and the foreign substances on the surface through the acquired image to judge whether or not there is a defect.

In the conventional display panel inspection apparatus 100, the fixing unit 150 is disposed at a position corresponding to the electrode of the display panel D in order to fix the display panel D without covering the screen of the display panel D The electrode portion of the display panel D is covered by the fixing unit 150 when the camera 160 picks up the display panel D for alignment so that the electrode 160 is aligned with respect to the other side of the display panel D do.

In other words, the conventional test apparatus for a display panel 100 determines whether or not the other side of the display panel D is positioned at a reference point regardless of whether or not the electrode of the display panel D and the terminal of the test unit 130 are in contact with each other The alignment error of the display panel D is frequently generated as the display panel D is aligned with the display panel D, and the inspection efficiency is remarkably lowered.

In the conventional display panel inspection apparatus 100, the loading arm sucks the display panel D and seats it on the upper surface of the receiving plate 120, and then moves the display panel D from the upper surface of the receiving plate 120 to align The adsorption position of the display panel D adsorbed by the loading arm is displaced due to the frictional force between the backing plate 120 and the display panel in the process, which makes it difficult to accurately align the display panel D at a predetermined position.

In order to prevent the displacement of the display panel D during the inspection, the conventional inspection apparatus for a display panel 100 has a structure in which the fixing unit 150 is lowered by the cylinder as described above, There is a problem that the display panel D is damaged due to a contact impact occurring when the fixing unit 150 is lowered and comes into contact with the display panel D. [

Korean Patent Publication No. 2014-0068543 " Display panel inspection apparatus and inspection method thereof "

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and an object of the present invention is to provide an image pickup apparatus, in which an alignment camera is provided below a receiving plate, The present invention also provides an inspection apparatus for a display panel capable of greatly reducing an alignment error of a display panel by analyzing the alignment of the display panel and thereby greatly improving the inspection efficiency.

Another object of the present invention is to provide a display apparatus and a display apparatus which can improve alignment efficiency by moving and aligning a display panel in a floating state through the pressure of air discharged through an air hole of a supporting plate, And it is an object of the present invention to provide an inspection apparatus for a display panel which can prevent damage of the display panel due to contact between the fixed unit and the display panel.

According to an aspect of the present invention, there is provided a display panel inspection apparatus for inspecting a display panel having an electrode for outputting a video image on one side thereof, the apparatus comprising: a main body; And a terminal formed on one side of the body is disposed on one side of the receiving plate, and when the terminal is in contact with the electrode of the display panel, A test unit for transmitting a power supply and an inspection signal; and a test unit movably installed on one side of the main body, wherein the display panel is loaded on an upper surface of the receiving plate after the holding and holding of the display panel, A loading unit for loading in contact with the display, A fixed unit that is provided at a position corresponding to one side of the panel and presses and fixes one side of the loaded display panel; an imaging unit movably installed on the supporting plate and capturing the display panel; And a determination unit for determining whether or not the display panel is defective by analyzing the image obtained in the display unit, wherein the loading unit is installed at a lower portion of the receiving plate, and the electrode of the display panel and the terminal An alignment reading unit that generates a loading completion signal when an electrode of the display panel and a terminal of the test unit are read in contact with each other based on an image acquired by the alignment camera; And the display panel is attached to the base plate And a loading arm for loading the display panel on one side of the rate and completing the loading of the display panel according to the loading completion signal, wherein the fixed unit includes a body installed at a position corresponding to one side of the display panel, A fixing unit movably installed on the body part to move up and down and pressing and fixing one side of the display panel when the door is moved downwardly; and a fixing part interposed between the body part and the fixing part, An elastic member for applying an elastic force downward to the fixed portion and a moving force providing means having one side connected to the fixed portion and providing a moving force upward to the fixed portion, A flexible first pressing member provided on one side of the first pressing member so as to protrude downward and having a first filling space formed therein, A plate spring provided inside the first pressing member to provide an elastic force downward on an inner surface of the first pressing member and a plate spring provided on one side of the bottom surface of the fixing portion corresponding to the electrode of the display panel and the terminal of the test portion, And a communication passage formed in the interior of the fixing portion and communicating with the first filling space and the second filling space, characterized by comprising: a flexible second pressing member having a second filling space formed therein, Device.

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The illumination unit may further include an alignment light source unit disposed at a lower portion of the support plate and configured to irradiate light toward the display panel when the display panel is loaded, And an inspection light source unit provided in the vicinity of the plate and irradiating light in the direction of the display panel when the display panel is picked up by the image pickup unit, wherein the inspection light source unit is installed at the side of the receiving plate, And a top light source that is installed on the receiving plate so as to be movable in an inward and outward direction of the receiving plate and irradiates light toward the display panel when the receiving plate is positioned above the receiving plate.

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According to the present invention as described above, an alignment camera is provided at the lower part of the receiving plate together with the image pickup unit, and images of the electrodes of the display panel and the terminal portions of the test unit are analyzed from below the receiving plate, The alignment error can be greatly reduced and the inspection efficiency can be greatly improved.

According to the present invention, the alignment efficiency is further improved by moving and aligning the display panel in a floating state through the pressure of air discharged through the air holes of the backing plate, and further, through the first pressing member and the second pressing member There is an effect that the display panel can be prevented from being damaged due to contact between the fixed unit and the display panel.

1 is a view showing a conventional inspection apparatus for a display panel
2 is a perspective view of a test apparatus for a display panel according to an embodiment of the present invention,
3 is an enlarged view of 'A' shown in FIG. 2,
4 is a rear perspective view of a test apparatus for a display according to an embodiment of the present invention,
5 is a cross-sectional view of a receiving plate and a fixing unit according to an embodiment of the present invention,
6 is a view illustrating a state in which the display panel is loaded on the upper surface of the receiving plate according to the embodiment of the present invention,
7 is a view illustrating a state where the fixed unit according to the embodiment of the present invention fixes the display panel,
8 is a view illustrating a state in which the upper light source and the image pickup unit are moved to the upper portion of the display panel according to the embodiment of the present invention,
9 is a cross-sectional view showing a backing plate and a shock absorbing unit according to another embodiment of the present invention,
FIG. 10 is an enlarged view of 'B' shown in FIG. 9,
11 is a view showing a state in which a fixed unit according to another embodiment of the present invention is moved downward;

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

FIG. 2 is a perspective view of an inspection apparatus for a display panel according to an embodiment of the present invention, FIG. 3 is an enlarged view of 'A' shown in FIG. 2, FIG. 5 is a cross-sectional view of a receiving plate and a fixing unit according to an embodiment of the present invention. FIG.

2 to 5, an inspection apparatus 1 for a display panel according to an embodiment of the present invention includes a main body 10, a receiving plate 20, a testing unit 30, a loading unit 40 An illumination unit 70, a fixed unit 50, an image pickup unit 60,

The main body 10 is formed in a substantially box shape and has a receiving space formed therein. The main body 10 is provided with an installation space of each configuration described below and is shielded from being exposed to the outside, And prevents an accidental operation of the apparatus and an operation error caused by the collision with the worker or the object.

The main body 10 may be provided with a standby table J on one side of which a display panel supplied from the outside waits.

The support plate 20 is formed in a transparent glass plate shape and is installed on one side of the main body 10 and a display panel as an object to be inspected is seated on the upper surface thereof to stably support the bottom surface of the display panel.

The support plate 20 is provided with an opening G on one side thereof so that the alignment camera 41 of the loading unit 40, which will be described later, can easily pick up the terminals 31 of the display panel and the test unit 30, Can be formed.

The test unit 30 is electrically connected to an electrode formed on one side of the display panel for outputting a video image and applies power and an inspection signal to the display panel during the inspection process. The terminal 31 is disposed at a position corresponding to the opening G on one side of the upper surface of the receiving plate 20. [

The reason why the terminals 31 of the test unit 30 are disposed at the positions corresponding to the openings G is that when the display panel described later is seated on the upper surface of the receiving plate 20, 41 to pick up a portion of the display panel corresponding to the electrode of the display panel and the terminal 31 of the test section 30 and to determine whether the display panel and the test section 30 are in electrical contact with each other through the acquired image, So that it can be easily ascertained whether or not it is properly aligned at this inspection position.

The loading unit 40 includes an alignment camera 41 provided at a lower portion of the backing plate 20 and an alignment camera 41 for holding the electrodes of the display panel on the terminals 31 of the testing unit 30 A sorting reading unit 42 for generating a loading completion signal when contacted, and a loading arm 43 movably installed in one side of the main body 10 in X, Y and Z directions, And serves to load the display panel, which is an object to be inspected, to a predetermined position on the upper surface of the receiving plate 20. [

Here, the alignment camera 41 picks up images of one side of the display panel and the test section 30, more specifically, the electrodes of the display panel and the terminal section of the test section 30 upward from the lower part of the receiving plate 20 And to acquire a Korean image.

The alignment reading section 42 analyzes the image as described above and generates a loading completion signal when the electrode of the display panel is read as being contacted with the terminal 31 of the test section 30, To control the operation of the loading arm (43).

The loading arm 43 is set after gripping one side of the display panel supplied from the outside and loading the display panel to a preset position in the upper surface of the receiving plate 20 and transferring the display panel to the upper surface of the receiving plate 20 And moves the display panel within the range and separates the display panel from the display panel according to the loading completion signal, thereby aligning the display panel with the inspection position.

The fixing unit 50 includes a body portion 51 provided at a position corresponding to one side of the display panel on one side of the main body 10 and a fixing portion 52 mounted movably in the up and down direction on one side of the body portion 51 An elastic member 53 interposed between the body portion 51 and the fixing portion 52 to apply an elastic force downward to the fixing portion 52 and a fixing portion 52 provided on one side of the main body 10, And a moving force providing means 54 for providing a moving force upward, and serves to fix the position of the display panel aligned by the loading unit 40.

The body 51 is formed in a substantially block shape and is fixedly installed at a position corresponding to one side of the display panel on one side of the body 10 as described above to provide an installation area of a fixing part 52 described later, It plays a role of supporting it stably.

The fixing portion 52 is formed in a substantially rectangular parallelepiped shape and is moved downward by the elastic member 53 to press the one side of the display panel to fix the position of the display panel aligned by the loading unit 40 .

A general spring can be used as the elastic member 53. The elastic member 53 provides an elastic force downward to the fixing portion 52 so that the fixing portion 52 is moved downward to press one side of the display panel.

The moving force providing means 54 includes a cylinder 54a provided at the rear side of the fixed portion 52 and a cylinder 54a provided at the center so as to be rotatable on one side of the body portion 51 and the rear end portion being pressed by the cylinder 54a And a link member (54b) for upwardly pushing the one side of the fixed portion (52) and transmitting the upward force to the fixed portion (52) while the tip end portion is rotated upward. The loading unit (40) So that the fixing unit 50 is not interfered with during the aligning operation of the display panel.

The imaging unit 60 is provided on the upper portion of the receiving plate 20 so as to be movable in the X, Y, and Z axial directions, captures an image of a display panel located on the upper surface of the receiving plate 20, do.

In the present embodiment, the imaging unit 60 is shown as one using a single CCD camera, but a plurality of cameras can be used corresponding to the shape and size of the display panel, which is an object to be inspected.

The illumination unit 70 includes an alignment light source unit 71 provided at a lower portion of the receiving plate 20 and an inspection light source unit 72 installed in the vicinity of the receiving plate 20, The loading operation of the display panel and the inspection operation of the display panel can be performed more accurately by illuminating the display panel.

As described above, the alignment light source unit 71 is installed at a lower portion of the support plate 20. When the alignment camera 41 picks up the display panel to align the display panel, the alignment light source unit 71 irradiates light toward the display panel So that the image reading of the image quality can be performed, so that the alignment reading unit 42 can perform a more accurate image analysis.

The inspection light source unit 72 includes a lower light source 71a installed on the side of the display panel that is seated on the upper surface of the support plate 20 of one side of the main body 10 and a lower light source 71b installed on the upper side of the support plate 20 And an upper light source 72b provided so as to be movable in an outward direction. When the image pickup unit 60 picks up a display panel, it irradiates light toward the display panel to acquire a high quality image .

The upper light source 72b includes a frame part 72ba provided at one side of the main body 10 so as to be movable in the inner and outer directions of the receiving plate 20 and having an opening 72baa at the center thereof, And an LED 72bb provided on one side of the inner circumferential surface or the lower surface.

The upper light source 72b is positioned outside the backing plate 20 to avoid collision with the loading unit 40 when the display panel is loaded and when it is desired to inspect the display panel in the direction of the display panel, 20 to illuminate the display panel.

The discriminating unit 80 is electrically connected to the image sensing unit 60 and analyzes images acquired by the image sensing unit 60 to determine whether the display panel is lit, RGB color, defective pixels, It serves to judge whether it is bad or not.

FIG. 6 is a view illustrating a state in which the display panel is loaded on the upper surface of the receiving plate according to the embodiment of the present invention. FIG. 7 is a view illustrating a state in which the fixing unit according to the embodiment of the present invention fixes the display panel FIG. 8 is a view illustrating a state in which the upper light source and the image pickup unit are moved to the upper portion of the display panel according to the embodiment of the present invention.

The operation of the inspection apparatus 1 for a display panel according to an embodiment of the present invention having such a configuration will be described with reference to FIGS. 6 to 8. FIG.

The display panel D is attached to the upper surface of the receiving plate 20 by moving the receiving arm 43 in a direction corresponding to the receiving plate 20 after the loading arm 43 picks up and holds the prepared display panel D, (71) is turned ON to illuminate the display panel (D).

At the same time, the alignment camera 41 moves the display panel D, the test unit 30, the display panel D, And acquires an image.

The alignment reading unit 42 analyzes the image captured by the alignment camera 41 and when the electrode D1 of the moving display panel D and the terminal 31 of the test unit 30 are read in contact with each other, A loading completion signal is applied to the display panel 43 to stop the movement of the display panel D and to disengage the loading arm 43 from the display panel D to complete the alignment of the display panel D.

When the alignment of the display panel D is completed, the upper light source 72b moves to the upper portion of the receiving plate 20 and the upper portion of the upper light source 72b, which is moved above the receiving plate 20, .

Thereafter, the upper light source 72b and the lower light source 71a illuminate the display panel D by irradiating the light from the inspection light source unit 72 in the direction of the display panel D, and the test panel 30 illuminates the display panel D , The image sensing unit 60 captures an image of the display panel D through the opening 72baa of the upper light source 72b to acquire an image.

The determination unit 80 determines whether the display panel D is defective by analyzing the acquired image and reading whether the display panel D is turned on for each color, whether it is a defective pixel or foreign matter on the surface, The completed display panel D is carried out by the loading arm 43 to the outside.

9 is an enlarged view of 'B' shown in FIG. 9, and FIG. 11 is a cross-sectional view of a fixing unit according to another embodiment of the present invention. FIG. Is moved downward.

The basic structure of the embodiment of Figs. 9 to 11 is the same as the embodiment of Figs. 2 to 8 except that the loading operation of the display panel can be performed more easily, It is formed in a structure that can prevent the panel from being damaged.

9 to 11, the present embodiment differs from the previous embodiment in that a plurality of air holes 21 are formed on the upper surface of the backing plate 20, and the fixing unit 50 is fixed to the first pressing member 55 A leaf spring 56, a second biasing member 57, and a communication passage 58. The plate spring 56 is provided with a plate spring 56,

A plurality of air holes 21 are formed on one side of the upper surface of the backing plate 20 corresponding to the area where the display panel is seated, so that air supplied from the outside during the loading of the display panel is supplied to the plurality of air holes 21 As shown in FIG.

That is, in the present embodiment, the display panel is moved in a state spaced apart from the upper surface of the backing plate 20 by a pressure of air discharged through the air holes 21 during the display panel loading / 20 and the display panel to reduce the frictional force between the display panel and the display panel, thereby facilitating the movement of the display panel for alignment, and at the same time, removing foreign matter remaining between the support plate 20 and the display, can do.

The first pressing member 55 of the fixing unit 50 is formed of a soft rubber material and is provided on one side of the bottom surface of the fixing portion 51 so as to protrude downward on one side corresponding to the main body of the display panel, A first filling space 55a is formed.

When the fixing portion 52 is lowered in the state where the air is introduced into the first filling space 55a, the first pressing member 55 descends to press the one side of the display panel, And functions to move the air in the first filling space 55a to the second filling space 57 through the communication path 58, which will be described later, while pressing the display panel.

The leaf spring 56 is provided inside the first pressing member 55 and provides an elastic force to the first pressing member 55 toward the display panel so that the first pressing member 55 protrudes downward, When the first pressing member 55 is moved upward together with the upward movement of the fixing portion 52, the first pressing member 55 is returned to the shape protruding downward from the fixing portion 52, So that air is again introduced into the filling space 55a.

The second pressing member 57 is formed of a soft rubber material such as the first pressing member 55 and corresponds to the electrode D1 of the display panel and the terminal 31 of the test portion on one side of the bottom surface of the fixing portion 52 And a second filling space 57a is formed therein.

When the first pressing member 55 presses the display panel, the air in the first filling space 55a flows into the second filling space 57a through the communication path, So that the contact state between the electrode D1 of the display panel and the terminal 31 of the test portion 30 is maintained by pressing the electrode D1 of the display panel or the terminal 31 of the test portion 30 downwardly, .

The communication path 58 is a path of air formed on the one side of the fixing part 52. The communication path 58 connects the first and second filling spaces 55a and 57a, To the first filling space 55a and the second filling space 57a.

In this embodiment, when the first pressing member 55 is protruded outward by the leaf spring 56 and the fixing portion 52 is lowered in the state that air is filled in the first filling space 55a, 1 The pressing member (55) descends accompanied by pressing one side of the display panel body, thereby making it possible to firmly fix the display panel without being damaged by a contact impact.

In addition, when the first pressing member 55 presses one side of the main body of the display panel, the air in the first filling space 55a is moved to the second filling space 57a through the communication path, The electrode D1 of the display panel or one side of the terminal 31 of the test portion 30 is pressed downward as the electrode D1 of the display panel protrudes downward from the fixing portion 52, It is possible to maintain the contact state between the terminals 31 of the test portion, thereby improving the inspection efficiency.

Although the present invention has been described in connection with the above-mentioned embodiment, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

10: Main body 20: Support plate
21: air hole 30: test part
40: loading unit 41: alignment camera
42: alignment reading unit 43: loading arm
50: fixed unit 51:
52: fixing part 53: elastic member
54: moving force providing means 55: first pressing member
56: leaf spring 57: second pressing member
58: communication path 60: imaging section
70: illumination part 71: alignment light part
72: inspection light source part 72a: lower light source
72b: upper light source 72ba:
72baa: opening 72bb: LED
80:

Claims (5)

An inspection apparatus for a display panel for inspecting whether or not a display panel having electrodes for image output is formed on one side,
A body;
A transparent plate receiving plate provided on one side of the main body and having a display panel mounted on an upper surface thereof;
A test unit that is disposed on one side of the main body so as to be disposed at one side of the receiving plate and transmits power and an inspection signal to the display panel when the terminal is in contact with the electrode of the display panel;
A loading unit movably installed on one side of the main body and configured to load and load the display panel on the top surface of the receiving plate after the display panel is sucked and held while the electrodes of the display panel are in contact with the terminals of the testing unit;
A fixing unit installed at a position corresponding to one side of the display panel on one side of the main body and pressing and fixing one side of the loaded display panel;
An image pickup unit movably installed on an upper portion of the receiving plate, the image pickup unit capturing an image of the display panel; And
And a determination unit for determining whether the display panel is defective by analyzing the image acquired by the imaging unit,
The loading unit
An aligning camera installed at a lower portion of the receiving plate for picking up an image of an electrode of the display panel and a terminal of the testing unit which are seated on the upper surface of the receiving plate;
An alignment reading unit for generating a loading completion signal when an electrode of the display panel and a terminal of the test unit are read in contact with each other based on an image acquired by the alignment camera; And
And a loading arm movably installed on one side of the main body and loading the display panel on one side of the upper surface of the receiving plate and completing loading of the display panel according to the loading completion signal,
The fixed unit
A main body installed at a position corresponding to one side of the display panel on one side of the main body;
A fixing part movably installed on the body part in a vertical direction and pressing and fixing one side of the display panel when the display panel is moved downward;
An elastic member interposed between the body portion and the fixing portion to apply an elastic force downward to the fixing portion; And
A movable force providing means, one side of which is connected to the fixed portion to provide a moving force upward to the fixed portion;
A flexible first pressing member protruded downward from one side of the bottom surface of the fixing unit, corresponding to the main body of the display panel, and having a first filling space formed therein;
A leaf spring installed inside the first pressing member and providing an elastic force downward on the inner surface of the first pressing member;
A flexible second pressing member provided on one side of the bottom surface of the fixing unit, which corresponds to an electrode of the display panel and a terminal of the test unit, and has a second filling space formed therein; And
And a communication path formed inside the fixing portion and communicating the first filling space and the second filling space.
delete The method according to claim 1,
And a lighting unit installed at one side of the main body to illuminate the display panel,
The illumination unit
An alignment light source unit installed at a lower portion of the support plate to irradiate light toward the display panel when the display panel is loaded; And
And an inspection light source installed in the vicinity of the support plate and irradiating light toward the display panel when the display panel is picked up by the image pickup unit,
The inspection light source unit
A lower light source provided at the side of the receiving plate for emitting light in the direction of the display panel; And
And an upper light source that is installed on the upper portion of the receiving plate so as to be movable in an inner and outer direction of the receiving plate and irradiates light toward the display panel when the receiving plate is positioned above the receiving plate. .
The method according to claim 1,
The support plate has a plurality of air holes formed on one side of the upper surface corresponding to an area where the display panel is seated, and air supplied from the outside is discharged to the upper side through the plurality of air holes in the process of loading the display panel And a display panel.
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