KR100714289B1 - Optical Apparatus For Inspecting LCD - Google Patents

Abstract

Disclosed is an optical inspection device for LCD inspection which enables to quickly and automatically inspect LCD panels having various sizes and shapes. The optical device for LCD inspection of the present invention is installed on the main column, the main drive motor installed in the main column, the main bracket coupled to the main column by the main drive motor, and installed on the main bracket to move up and down together with the main bracket. A camera driving unit, a lens driving unit, a polarization filter driving unit, a sub column installed on one side of the main bracket, a sub driving motor installed on the sub column, and a sub bracket coupled to the sub column by a sub driving motor. The lens driving unit and the polarization filter driving unit are installed in the sub bracket to move up and down together with the sub bracket.

Description

Optical Apparatus For Inspecting LCD

1 is a perspective view showing that the camera driving unit, the lens driving unit, and the polarization filter driving unit of the optical device for LCD inspection according to the present invention is lowered integrally.

2 is a perspective view showing that the camera driving unit, the lens driving unit, and the polarization filter driving unit of the LCD inspection optical apparatus according to the present invention are raised integrally.

3 is a perspective view showing that the lens driving unit of the optical device for LCD inspection according to the present invention is lowered.

4 is a perspective view showing that the camera driving unit of the optical device for LCD inspection according to the present invention is rotated.

5 is a perspective view showing that the polarization filter driving unit of the optical device for LCD inspection according to the present invention is rotated.

6 is an exploded perspective view showing that the camera of the optical device for LCD inspection according to the present invention is rotatably supported by a bearing member.

* Description of symbols on the main parts of the drawings *

1: main column 2: main drive motor

10: main bracket 30: camera drive unit

31: camera 40: lens drive unit

41: sub column 42: sub drive motor

43: sub bracket 44: lens

50: polarization filter drive unit 54: polarization filter

The present invention relates to an optical device for LCD inspection that automatically inspects the pixels of an LCD (Liquid Crystal Display) panel, and more particularly, by installing a camera, a lens, and a polarizing filter to translate and / or rotate. The present invention relates to an optical device for inspecting LCDs, which enables to automatically and quickly inspect pixels of small and medium sized LCD panels.

LCD panel, which is a kind of flat panel display device, displays information by using the characteristics of liquid crystal whose light transmittance changes according to the voltage. It can be driven with low voltage and consumes little power, so it is widely used in office automation equipment and home appliances. have.

The LCD panel includes a manufacturing process of the upper and lower panels of the liquid crystal cell forming a pixel unit, a process of forming and rubbing an alignment layer for liquid crystal alignment, and a bonding process of the upper and lower plates. It is made through various processes such as the process of injecting and encapsulating the liquid crystal between the upper plate and the lower plate. After the liquid crystal injection and encapsulation process, the polarizing plate is attached to both sides of the upper and lower plates, and the final inspection work It is going to proceed.

The inspection operation includes an operation of automatically inspecting the pixels of the LCD panel using an optical device. The conventional LCD inspection optical device has a cantilever structure in which a camera is fixed and installed and a lens is suspended from the camera. After moving the camera to fit the size of the LCD panel, the LCD panel was inspected by manually adjusting the lens focus while watching the focus state of the monitor image.

On the other hand, when inspecting LCD panels with various shapes and sizes with different aspect ratios, the palette that seats the LCD panel is rotated by 90 ° manually, and the lens is installed to accurately detect defects. The polarizing filter is fixed and used.

However, such a conventional LCD inspection optical device is a structure that focuses the camera position and the lens manually when inspecting LCD panels of various sizes, so when examining the LCD panel outside the magnification and focusing area of the lens, There is an inconvenience to replace the lens.

In addition, in the conventional LCD inspection optical device when inspecting LCD panels of various shapes having different ratios of width and length, the inspection speed becomes slow because the palette on which the LCD panel is placed must be rotated by 90 ° angle. Accordingly, there is a disadvantage that a lot of inspection time takes.

In addition, the conventional LCD inspection optical device has a structure in which the polarizing filter is fixed to the front of the lens in order to accurately detect defects, so that the inspection is performed only at a single angle, thereby limiting the detection rate.

In addition, the conventional LCD inspection optical device is fixed to the camera only, the lens has a structure of the cantilever-shaped structure hanging on the camera is vulnerable to vibration and has a disadvantage in that the poor detection performance is significantly reduced.

The present invention is to solve the above-mentioned problems of the prior art, an object of the present invention is to install a camera, a lens, and a polarizing filter to translate and / or rotational movement to quickly install LCD panels having various sizes and shapes It is to provide an LCD inspection optical device that can automatically inspect.

Another object of the present invention is to provide an optical device for inspecting an LCD, which enables the camera, the lens, and the polarization filter to be operated in a firmly installed state.

In accordance with an aspect of the present invention, an LCD inspection optical device includes a main column, a main drive motor installed in the main column, a main bracket coupled to the main column by the main drive motor, and the main bracket. It is characterized in that it comprises a camera driving unit, a lens driving unit and a polarization filter driving unit installed in the bracket to move up and down with the main bracket.

The optical device for LCD inspection according to the present invention includes a sub-column installed on one side of the main bracket, a sub-drive motor installed on the sub-column, and a sub-bracket coupled to the sub-column by the sub-drive motor. The lens driving unit and the polarization filter driving unit may be installed in the sub bracket to move up and down together with the sub bracket.

The camera driving unit may include a camera, a first rotating motor coupled to the main bracket to rotate the camera, and a bearing member coupled to the main bracket to rotatably support the camera. .

The polarizing filter driving unit may include a polarizing filter, a second rotating motor coupled to the sub bracket, a pulley having the polarizing filter disposed thereon, and a belt connecting the second rotating motor to the pulley. It is characterized by one.

The bearing member may include an annular bearing rotatably supporting the camera and a bearing bracket which is fixed to the main bracket and has a bearing installation hole to accommodate and fix the bearing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are perspective views showing that the camera driving unit, the lens driving unit, and the polarization filter driving unit of the LCD inspection optical apparatus according to the present invention are lowered and raised, integrally, and FIG. 3 is an LCD according to the present invention. 4 and 5 are perspective views showing that the camera driving unit and the polarization filter driving unit of the LCD inspection optical device rotate, respectively, according to the present invention. 6 is an exploded perspective view showing that the camera of the optical device for LCD inspection according to the present invention is rotatably supported by a bearing member.

As shown in FIGS. 1 to 5, the optical device for LCD inspection according to the present invention includes a main column 1 arranged vertically and a main bracket 10 coupled to the main column 1 in a liftable manner. And a main drive motor 2 installed at an upper end of the main column 1 to provide a driving force for moving the main bracket 10 up and down, and the main bracket 10 to be able to move up and down integrally with the main bracket 10. ) Includes a camera driving unit 30, a lens driving unit 40, and a polarization filter driving unit 50.

Although not shown in detail in the drawing, the main bracket 10 is connected to the main drive motor 2 through a power transmission device such as a ball skew device or a sprocket device to enable a slide movement along the main column 1. Is installed.

Further, in the drawing, the lower end of the main column 1 is shown as being omitted. The lower end of the main column 1 has a base for fixing the main column 1 to the bottom of a place for inspecting the LCD panel. To form.

The main bracket 10 has a first bracket portion 11 to which the camera driving unit 30 is fixed, and a second bracket portion for allowing the lens driving unit 40 and the polarization filter driving unit 50 to be lifted up and down. (12) is formed integrally.

The first bracket part 11 is disposed to be slidably movable in the main column 1, and the second bracket part 12 extends to form a cross-section having an approximately “c” shape at one side of the first bracket part 11. Is formed.

The lens drive unit 40 includes a sub-column 41 mounted upright on the second bracket part 12, a sub-drive motor 42 provided on an upper end of the sub-column 41, and a sub-column 41. A sub bracket 43 is provided to be slidably moved up and down by the sub drive motor 42.

Like the main bracket 10, the sub bracket 43 is connected to the sub drive motor 42 through a power transmission device, not shown, so that the sub bracket 43 is slidably moved along the sub column 41.

The sub bracket 43 is slidably coupled to the sub column 41 and has a first bracket portion 43a through which the lens 44 is installed, and a first bracket portion 43a by the connecting bracket portion 43c. And a second bracket portion 43b for allowing the polarization filter driving unit 50 to be installed. In order to fix the lens 44 to the first bracket portion 43a, a lens mounting hole 45 is formed in the first bracket portion 43a.

Therefore, when the sub-drive motor 42 is operated, as the sub-bracket 43 moves up and down, the lens 44 and the polarization filter driving unit 50 move together, so that the sub-drive motor 42 moves closer to or farther from the camera driving unit 30. Can be.

Camera driving unit 30 is coupled to the top of the camera 31, the main bracket 10, the first rotary motor 32 to provide a driving force for rotating the camera 31, and the main bracket 10 It is provided with a bearing member 60 coupled to the middle portion to rotatably support the camera 31. The camera 31 is accommodated in the camera housing 33 and installed to rotate by the first rotating motor 32 and the bearing member 60.

The polarization filter driving unit 50 pulls the driving force of the second rotation motor 51, the pulley 52, and the second rotation motor 51 installed on the second bracket portion 43b of the sub bracket 43. It is provided with a belt 53 for transmitting to rotate the pulley 52, and a polarizing filter 54 is fixed to the upper portion of the pulley (52).

Accordingly, when the second rotary motor 51 is operated, the pulley 52 is rotated by the belt 53, so that the polarization filter 54 can be adjusted to a desired placement angle.

As shown in FIG. 6, the bearing member 60 includes an annular bearing 61 rotatably supporting the camera 31 and a bearing bracket 62 fixed to the main bracket 10. . Bearing mounting holes 63 are formed in the bearing bracket 62 so that the bearing 61 is accommodated and fixed so that the bearing 61 is fixed to the bearing bracket 62.

The camera adapter 34 is inserted into the lower end of the camera 31, the outer peripheral surface of the camera adapter 34 is rotatably coupled to the bearing 61, so that the camera 31 is the first rotation motor 32 It can be rotated by.

In addition, a lens adapter 46 is coupled to an upper portion of the lens 44 that is inserted into and fixed to the lens installation hole 45 formed in the first bracket portion 43a of the sub-bracket 43 and is formed together with the lens 44. 1 is fixed to the bracket portion 43, the upper end of the lens adapter 46 is coupled to the camera adapter 34 through the bearing mounting hole 63, the camera 31 and the lens together with the camera adapter 34 ( 44) to cover.

Therefore, when the sub bracket 43 is moved up and down along the sub column 41 by the sub drive motor 42, the lens adapter 46 is coupled with the camera adapter 34 coupled to the bearing member 60. Ascend and descend.

Next, the operation of the LCD inspection optical apparatus according to the present invention configured as described above will be described.

1 and 2, when the main drive motor 2 installed on the top of the main column 1 is operated, the main bracket 10 slidably installed on the main column 1 is elevated. Accordingly, the camera driving unit 30 and the lens driving unit 40 installed in the main bracket 10 move together to change the working distance according to the size and shape of the LCD panel to be inspected.

By this operation, the field of view and the object distance of the camera 31 are automatically adjusted to quickly cope with the case where an LCD panel having a different size and shape from a completed LCD panel is input.

Next, as shown in FIG. 3, when the sub drive motor 42 installed on the top of the sub column 41 is operated, the sub bracket 43 slidably installed in the sub column 41 is raised (or lowered). Accordingly, the lens 44 and the polarization filter driving unit 50 installed in the sub bracket 43 move together to adjust the magnification and the focus of the lens 44.

As shown in FIG. 4 in the state in which the field of view and water distance of the camera 31 and the magnification and focus of the lens 44 are adjusted according to the size of the LCD panel to be inspected as described above, the first rotating motor 32 When operating the camera 31 is connected to the first rotary motor 32 and rotatably supported by the bearing member 60 to rotate the camera 31 according to the arrangement state of the LCD panel different in the horizontal length and vertical length ( 31) is adjusted.

Subsequently, as shown in FIG. 5, when the second rotary motor 51 is operated, the belt 53 and the pulley 52 rotate to adjust the arrangement angle of the polarization filter 54. By changing the direction, it is easy to distinguish the internal abnormality and external foreign matter inflow of the LCD panel to be inspected through the captured image, so that the defect inspection can be performed more accurately.

As described in detail above, the optical inspection device for LCD according to the present invention can reduce the material cost by being able to inspect a small and medium-sized LCD panel having various sizes and shapes with one camera and a lens.

In addition, the optical device for LCD inspection according to the present invention is able to quickly and automatically inspect various LCD panels of different sizes and different horizontal and vertical ratios through translational movement of the camera and lens and rotational movement of the camera and polarization filter. This can shorten the inspection time.

In addition, the optical device for LCD inspection according to the present invention has a structure that the camera driving unit, the lens driving unit, and the polarization filter driving unit is firmly fixed to the main column and the sub column has a strong effect against vibration.

Claims (5)

A main drive unit, a main drive motor installed in the main column, a main bracket coupled to the main column by the main drive motor, and installed in the main bracket so as to move up and down together with the main bracket And a lens driving unit and a polarization filter driving unit. The method of claim 1, further comprising: a sub-column installed on one side of the main bracket, a sub-drive motor installed on the sub-column, and a sub-bracket coupled to the sub-column by the sub-drive motor. And a driving unit and a polarization filter driving unit are installed in the sub bracket to move up and down together with the sub bracket. The camera driving unit of claim 1, further comprising a camera, a first rotating motor coupled to the main bracket to rotate the camera, and a bearing member coupled to the main bracket to rotatably support the camera. LCD inspection optical device, characterized in that. 3. The polarization filter driving unit of claim 2, wherein the polarization filter driving unit connects the polarization filter, the second rotation motor coupled to the sub bracket, the pulley having the polarization filter disposed thereon, and the second rotation motor and the pulley. LCD inspection optical device comprising a belt to. 4. The bearing member of claim 3, wherein the bearing member includes an annular bearing rotatably supporting the camera, and a bearing bracket having a bearing mounting hole fixed to the main bracket and accommodating the bearing. LCD inspection optical device.

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