KR101668085B1

KR101668085B1 - Apparatus for inspecting curved display panel

Info

Publication number: KR101668085B1
Application number: KR1020140065957A
Authority: KR
Inventors: 박금성
Original assignee: 주식회사 영우디에스피
Priority date: 2014-05-30
Filing date: 2014-05-30
Publication date: 2016-10-24
Also published as: KR20150137676A

Abstract

The present invention relates to a curved display panel inspection apparatus capable of performing an optical system inspection on a curved display panel.
The curved display panel inspection apparatus according to the present invention includes a curved plate 111 on which a curved display panel P2 as an inspected object is placed and a rotary unit 112 for rotating the curved plate 111 in the forward and reverse directions about a horizontal rotary shaft 112b A test stage 110 provided with an inspection stage 110,
A camera 120 for performing optical inspection of the curved display panel P2 mounted on the curved plate 111 and spaced apart from the curved plate 111,
A first transfer unit 130 for linearly moving the position of the camera 120 in a vertical direction,
And a second transfer unit for linearly moving the position of the inspection stage (110).

Description

[0001] Apparatus for inspecting curved display panel [0002]

The present invention relates to a curved display panel inspection apparatus capable of performing an optical system inspection on a curved display panel.

In general, an LCD or an LED, which is one of the flat panel display panels, has better visibility than a cathode ray tube (CRT) and has a smaller average power consumption than a CRT having the same screen size, As a next-generation display device of a mobile phone, a computer monitor, and a television.

The LCD or LED is manufactured through various manufacturing processes. When starting or finishing each manufacturing process, an inspection process for inspecting a defect that may occur in a preceding manufacturing process or a corresponding manufacturing process is essentially required.

Such an inspection process is performed through various methods, among which there is an inspection method using an optical system.

In general, an inspection method using an optical system is mainly performed when a circuit and an image inspection of a display panel are performed. As shown in FIG. 1, in a conventional display panel inspection apparatus, a display panel P1 A camera 20 for performing an optical inspection of the display panel P1 mounted on the inspection stage 10 so as to be spaced apart from the upper portion of the inspection stage 10; And a second transfer unit 40 for moving the inspection stage 10 in the examination progress direction in accordance with the control signal of the camera 20. The first transfer unit 30 is provided with a first transfer unit 30 for setting the horizontal and vertical positions of the inspection stage 10, do.

However, since the conventional display panel inspection apparatus configured as described above is optimized for inspection of the display panel P1 having a flat surface, it is difficult to perform a normal inspection in the case of the recently-developed curved display panel.

2, in order for the normal inspection to be performed, the camera 20 is placed on the normal line L formed at all the photographing points of the curved display panel P2 at a predetermined distance from the surface of the curved display panel P2 The position of the camera 20 can not be controlled by the first transfer unit 30 and the second transfer unit 40 alone.

KR 10-0756438 B1

It is an object of the present invention to provide a curved display panel inspection apparatus capable of performing a quick and accurate optical system inspection on a curved display panel.

In order to achieve the above object, a curved display panel inspection apparatus of the present invention comprises: a curved surface plate on which a curved display panel to be inspected is placed; an inspection stage having a rotation unit for rotating the curved surface plate about a horizontal rotation axis; A first transfer unit for linearly moving the position of the camera in a vertical direction, a second transfer unit for moving the position of the inspection stage in a straight line And a second transfer unit for transferring the first transfer unit.

Further, the second transfer unit may be operated to linearly move the inspection stage in the horizontal direction and the inspection progress direction.

Also, the first transfer unit may be operated to linearly move the camera in the horizontal direction, and the second transfer unit may be operated to move the inspection stage in the inspection progress direction.

According to another aspect of the present invention, there is provided an apparatus for inspecting a curved display panel including a curved surface plate on which a curved display panel is mounted, the curved surface plate being rotatable in a normal and reverse direction through a rotation unit, It is possible to precisely perform the inspection of the optical system.

1 is a front view showing a conventional display panel inspection apparatus.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a display panel inspection apparatus.
3 is a front view of a curved display panel inspection apparatus according to the present invention.
4 is a side view of a curved display panel inspection apparatus according to the present invention.
5 is a state of use according to Fig.
6 is a front view of another embodiment of a curved display panel inspection apparatus according to the present invention.
7 is a use state diagram according to Fig.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. The same reference numerals are used for the same components, and only the different portions are described for the sake of clarity.

3 and 4, the curved display panel inspection apparatus according to the present invention includes a curved surface plate 111 on which a curved display panel P2 as an inspected object is placed, The inspection stage 110 provided with a rotation unit 112 for rotating the display panel 111 in the normal and reverse directions and the optical system of the curved display panel P2 mounted on the curved plate 111 spaced apart from the curved plate 111, A first transfer unit 130 for moving the position of the camera 120 and a second transfer unit 140 for moving the position of the inspection stage 110 .

The inspection stage 110 includes a curved surface plate 111 on which the curved surface display panel P2 is to be inspected, on which the curved surface display panel P2 to be inspected is mounted. The curved surface plate 111 is formed such that the upper surface on which the curved display panel P2 is placed has the same curvature as that of the curved display panel P2. Accordingly, the curved display panel P2 is seated in a state of being in close contact with the upper surface of the curved plate 111. [

In addition, the inspection stage 110 includes a rotation unit 112 for rotating the curved plate 111 in the normal and reverse directions around the horizontal rotation axis 112b. The rotary unit 112 is fixed to a lower portion of the curved plate 111 on one side and is fixed on a horizontal rotary shaft 112b of the normal and reverse motors 112a on the other side, And a fixed rotating block 112c. The horizontal rotation axis 112b of the forward and reverse motors 112a is arranged in the horizontal direction in parallel with the inspection progressing direction.

Accordingly, when the horizontal rotation shaft 112b rotates in the normal direction or the reverse direction by driving the normal / reverse motor 112a, the rotation block 112c rotates in the forward or reverse direction along the horizontal rotation axis 112b, The curved surface plate 111 fixed to one side of the base plate 111 rotates in the forward or reverse direction.

It is preferable that the curved surface plate 111 is detachably installed from the inspection stage 110 so that the curved surface display panel P2 can be replaced in case the specification of the curved display panel P2 is changed. In this embodiment, the curved plate 111 can be replaced from the inspection stage 110 by separating one side and the other side of the rotary block 112c.

In addition , a plurality of suction holes (not shown) connected to the vacuum pump P may be formed on the curved surface plate 111 so that the curved display panel P2 can be fixed by suction.

The first transfer unit 130 linearly transfers the position of the camera 120 in the vertical direction (Z-axis direction in the figure). In this case, the first transfer unit 130 is installed through a horizontal support 150 fixed to the floor on which the inspection stage 110 is placed. The first transfer unit 130 is installed vertically to the horizontal support 150 And a first transfer robot 131 composed of a linear actuator.

The second transfer unit 140 transfers the position of the inspection stage 110. The second transfer unit 140 may be operated to linearly move the inspection stage 110 in the horizontal direction and the inspection progress direction. In this case, it is preferable that the second conveying robot 141 and the third conveying robot 142 are disposed in the lower part of the inspection stage 110. The second transfer robot 141 and the third transfer robot 142 are linear actuators and the second transfer robot 141 is installed below the inspection stage 110 to detect the inspection stage 110 The third conveying robot 142 is installed below the second conveying robot 141 to move the second conveying robot 141 in the horizontal direction X axis direction), the positions of the second transfer robot 141 and the third transfer robot 142 may be reversed.

When the curved display panel P2 is placed on the curved plate 111, the curved display panel P2 is pressed against the curved plate 111 while the vacuum is applied to the suction holes, As shown in Fig.

When the curved display panel P2 is fixed to the curved surface plate 111, the first transfer robot 131 operates to vertically lower the camera 120 to the previously set setting position. At the same time, the second transfer robot 141 and the third transfer robot 142 simultaneously move the position of the inspection stage 110 to the previously set setting position.

When the positions of the camera 120 and the inspection stage 110 are set through the above process, the camera 120 detects the position of the curved display panel P2 on the normal line L formed at the photographing point of the curved display panel P2. The inspection of the curved display panel P2 through the camera 120 in a state in which the inspection stage 110 is slowly moved in the inspection progressing direction through the second conveying robot 141 .

Meanwhile, as shown in FIG. 5, when the movement of the inspection stage 110 is completed through the second transfer robot 141 to the designated inspection section. The rotation unit 112 rotates the inspection stage 110 at a predetermined angle to one side for inspection at another point. In some cases, the third transfer robot 142 may also transfer the inspection stage 110 in the horizontal direction. At this time, the first transfer robot 131 moves the camera 120 in accordance with the phase of the changed curved display panel P2 to position the camera 120 at the correct inspection point. In this way, the camera 120 is positioned at a position a certain distance from the new photographing point of the curved display panel P2 on the normal line formed at the new photographing point of the curved display panel P2.

If the positions of the camera 120 and the inspection stage 110 are reset through the above process, the inspection stage 110 moves the inspection progress direction in the direction opposite to the forward direction through the second transfer robot 141 The inspection of the curved display panel P2 through the camera 120 is performed while moving slowly. The operation of the curved display panel is inspected over the entire area while repeating such operations continuously.

6, the first transfer unit 130 of the present invention is operated to linearly move the camera 120 also horizontally, and the second transfer unit 130 140 may be operated to linearly move the curved plate 111 in the inspection progressing direction.

In this case, the first transfer unit 130 may include a fourth transfer robot 132 and a fifth transfer robot 133 installed on the horizontal support 150. The fourth conveying robot 132 and the fifth conveying robot 133 are linear actuators. In the present embodiment, the fourth conveying robot 132 horizontally moves the fifth conveying robot 133 in the horizontal direction, The fourth transfer robot 132 and the fifth transfer robot 132 are arranged on the support table 150 and the fifth transfer robot 133 is coupled with the camera 120 to transfer the camera 120 in the vertical direction. The positions of the robots 133 may be exchanged with each other.

The second transfer unit 140 may include a sixth transfer robot 143, which is a linear actuator installed at a lower portion of the inspection stage 110.

When the curved display panel P2 is fixed to the curved plate 111 when the first transfer unit 130 and the second transfer unit 140 are configured as described above, the fifth transfer robot 133 operates, The camera 120 is vertically lowered to the input setting position. At the same time, the fourth transfer robot 132 and the sixth transfer robot 143 simultaneously move the position of the inspection stage 110 to the previously set setting position.

When the positions of the camera 120 and the inspection stage 110 are set through the above process, the camera 120 moves from the photographing point of the curved display panel P2 on the normal line formed at the photographing point of the curved display panel P2 The inspection of the curved display panel P2 through the camera 120 in a state in which the inspection stage 110 is slowly moved in the inspection progressing direction through the sixth conveying robot 143 is performed do.

On the other hand, as shown in FIG. 7, when the movement of the inspection stage 110 is completed through the sixth conveying robot 143 to the designated inspection section. The rotation unit 112 rotates the inspection stage 110 at a predetermined angle to one side for inspection at another point. In some cases, the fourth transfer robot 132 may also transfer the inspection stage 110 in the horizontal direction. At this time, the fifth transfer robot 133 moves the camera 120 up and down according to the phase of the changed curved display panel P2, thereby positioning the camera 120 at the correct inspection point. The camera 120 is positioned at a predetermined distance from the new photographing point of the curved display panel P2 on the normal line L formed at the new photographing point of the curved display panel P2.

When the positions of the camera 120 and the inspection stage 110 are reset through the above process, the inspection stage 110 moves the inspection progress direction in the direction opposite to the forward direction through the sixth transfer robot 143 The inspection of the curved display panel P2 through the camera 120 is performed while moving slowly. The operation of the curved display panel is inspected over the entire area while repeating such operations continuously.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the present invention may be varied and varied within the spirit and scope of the invention as set forth in the following claims And should be included in the scope of the invention.

110 ... inspection stage 111 ... curved plate
112 ... rotation unit 112a ... normal and reverse motors
112b ... horizontal rotation axis 112c ... rotation block
120 ... camera 130 ... first transfer unit
131 ... first transfer robot 132 ... fourth transfer robot
133 ... fifth transfer robot 140 ... second transfer unit
141 ... second transfer robot 142 ... third transfer robot
143 ... sixth transfer robot 150 ... horizontal support
P ... Vacuum pump P2 ... Curved display panel

Claims

A test stage having a curved surface plate on which the curved surface display panel to be inspected is placed and a rotating unit for rotating the curved surface plate in normal and reverse directions about a horizontal rotation axis,
A camera for performing an optical inspection of the curved display panel mounted on the curved surface plate so as to be spaced from the upper surface of the curved surface plate;
A first transfer unit for linearly moving the position of the camera in a vertical direction,
And a second transfer unit for linearly moving the position of the inspection stage.

The method according to claim 1,
Wherein the second transfer unit is operated to linearly move the inspection stage in the horizontal direction and in the inspection progress direction.

The method according to claim 1,
The first transfer unit is operated to linearly move the camera horizontally
And the second transfer unit is operated to linearly move the inspection stage in the inspection progressing direction.