KR20020066491A - Handler for testing LCD - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) test handler is provided to precisely align and connect small-sized LCDs to an inspection unit, thereby improving the reliability and the efficiency of LCD testing. CONSTITUTION: An LCD test handler includes a rectangular frame type base frame(2) slantly mounted to a main body(1) of the handler, a rectangular frame type mounting plate(3) rotatively mounted to a front surface part of the base plate, a fixed block(4) mounted between the base plate and the mounting plate, a work table(5) mounted to a front surface part of the fixed block to slide vertically via a sliding element and having socket parts for mounting LCDs to test, the work table moving from an LCD attachment/detachment position of the mounting plate to an LCD test position, a driving element(4b) for moving the work table vertically, an inspection unit mounted at a rear part of the mounting plate to be connected to an external testing equipment and electrically connected to LCD pads on the work table moved to the test position for carrying out the test, and an alignment/connection element(6) for aligning the LCDs with respect to the inspection unit to connect the LCDs to the inspection unit when the work table moves to the LCD test position.

Description

Liquid Crystal Display (LCD) Test Handler {Handler for testing LCD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handler for testing a thin film liquid crystal display (TFT LCD), and in particular, a liquid crystal display capable of effectively testing an amorphous-silicon LCD among small LCDs used in portable wireless mobile communication terminals. It relates to a device (LCD) test handler.

In general, a small thin film liquid crystal display (TFT LCD) is used as a monitor in a portable wireless mobile terminal called a mobile phone. In recent years, according to the spread of mobile phones capable of playing various color images such as video playback through the Internet. There is a need for an LCD with high performance.

In such a mobile phone, if there is an abnormality in the performance of the LCD, a display device, the reliability of the mobile phone is drastically deteriorated and the value of the product is lowered.

However, the inspection of the LCD is performed by electrically connecting the pad of the LCD to the inspection unit. In the case of polysilicon having a relatively large pad pitch, the test is relatively easy, but the pad pitch is very easy. In the case of narrow amorphous silicon (amorphous-silicon) LCD has a problem that it is very difficult to accurately align the LCD with the test unit and to accurately connect the pad of the LCD to the test unit.

Accordingly, the present invention has been made to solve the above problems, and provides a liquid crystal display (LCD) test handler that can be easily tested by connecting the small LCD automatically aligned with the inspection unit. There is a purpose.

1 is a perspective view of a liquid crystal display test handler according to the present invention, in which the inspection unit is removed.

2 is a side cross-sectional view of the handler of FIG.

3 is a perspective view of a portion of the handler of FIG. 1;

4 is a perspective view with the cover of the cross section removed to show the drive means for laterally moving the microscope of the handler of FIG.

Explanation of Reference Symbols in Major Parts of Drawings

1-Body 2-Base Plate

3-Mounting Plate 4-Fixed Block

4a-Slide Rail 4b-Pneumatic Cylinder

5-Worktable 5a-Socket Section

6-Driver 7-CCD Camera

8-crossbar 9-microscope

10-Manual spring 12, 14-LM Guide

13, 15-Ballscrew 13a, 15a-Handle

In order to achieve the above object, the present invention, the base plate of the rectangular frame form which is installed in front of the main body of the handler; An installation plate having a rectangular frame shape rotatably installed on the front side of the base plate; A fixed block installed between the base plate and the mounting plate; The work piece is provided with a socket for mounting an LCD to be tested, and is installed on the front of the fixing block so as to be movable up and down by means of a slide member so as to move from the LCD long / removable position of the lower part of the mounting plate to the upper LCD test position. Table; Drive means for moving the worktable up and down; An inspection unit installed at a rear side of the installation plate to be connected to an external test device and electrically connected to pads of the LCD on the worktable moved to the test position to test the LCD; A liquid crystal display (LCD) test handler configured to include an alignment / connection means for aligning an LCD with respect to the inspection unit and connecting the inspection unit when the work table is moved to the LCD test position.

According to another aspect of the present invention, the handler of the present invention is further provided with a vision inspection device installed on the front upper end of the main body so as to be movable up and down and left and right to inspect the presence of an external defect of the LCD under test.

Hereinafter, an embodiment of a liquid crystal display (LCD) test handler according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, a base plate 2 in the form of a square frame having an open center in the handler body 1 is installed, and a lower end thereof is provided on the front portion of the base plate 2. ) Is provided with a mounting plate (3) rotatably coupled around the hinge shaft (3a).

An upper end portion of the rear surface of the installation plate 3 is detachably installed to a test unit (not shown) which is electrically connected to an external test equipment and electrically connected to a pad portion of an LCD to be tested.

In addition, a fixing block 4 is installed between the base plate 2 and the mounting plate 3, and the front portion of the fixing block 4 is coupled to the upper and lower sides of the handlers at both edge portions of the fixing block 4. The worktable 5 is movably coupled via the slide rails 4a, which can be moved from the LCD mounting position of the lower base plate to the LCD test position of the upper base plate 2. In addition, a central portion of the work table 5 is provided with a socket portion 5a on which an LCD to be tested is mounted.

Inside the fixed block 4, a pneumatic cylinder 4b is provided as a driving means for engaging the rod end thereof with one end of the work table 5 to move the work table 5 up and down.

The driving unit 6 which is fixedly coupled to the back side of the fixed block 4 to the rear main body 1 of the fixed block 4 to move the fixed block 4 in XYZ-θ, ie, up, down, left, right, back, and rotational directions. Bar is installed, the drive unit 6 achieves a precise alignment between the LCD and the inspection unit (not shown) when the work table 5 is moved to the test position, and then connects and releases the LCD to the inspection unit (not shown). It will play a role.

In addition, a control unit for controlling the overall operation of the handler by optically detecting the position of the LCD mounted on the socket portion 5a when the work table 5 moves to the test position at the upper end of the front plate of the installation plate 3. A pair of CCD cameras 7 to transmit to (not shown) are provided.

On the other hand, in the front portion of the handler body 1 is provided with a cross bar 8 transversely to the main body in the transverse direction to be movable up and down via a pair of L guides (12) respectively installed on both side portions and In this crossbar 8, a microscope 9 for precise inspection is provided so as to be able to move laterally in the case where it is impossible to visually determine whether a defective LCD is being tested by visual inspection.

One side of the front portion of the main body 1 is provided with a ball screw 13 is coupled to one side of the crosspiece 8 to move the crossbar 8 up and down and adjust the position, the ball screw 13 The lower end of the handle is formed by the hand 13a so that the operator can turn by turning the crosspiece (8) position.

And, as shown in Figure 4, the crosspiece 8 is formed in the shape of a rectangular box to the side movement of the ball screw 15 and the microscope 9 coupled to the microscope 9 therein. The guide L guide 14 is installed, and the handle 15a is installed at both ends of the ball screw 15 so that an operator can turn the ball screw 15 by hand and adjust the position of the microscope 9. .

The handle 15a is exposed to the outside through a slit 8a formed in the front cover portion of the crosspiece 8 so that the operator can operate it.

On the other hand, on both sides of the upper end of the main body 1, there is provided a spring spring 10 that is coupled to each of both sides of the crosspiece 8, the spring spring 10 is a crosspiece 8 and the microscope 9 It has a spring force corresponding to the load of and acts as a counter weight that supports the crossbar 8 at that position when the operator places the crossbar 8 at any position of the main body.

The liquid crystal display (LCD) test handler of the present invention configured as described above operates as follows.

Before mounting the LCD to be tested, the lower surface of the base plate 2 of the worktable 5 is placed at the mounting position of the LCD, and the operator attaches the LCD to be tested to the socket portion 5a of the worktable 5. After the handler is operated, the work table 5 is moved upward along the slide rail 4a by the operation of the pneumatic cylinder 4b so that the LCD is positioned at the test position.

Subsequently, the fixed block 4 and the work table 5 move slightly toward the mounting plate 3, that is, in the Z direction, by the operation of the drive unit 6, and in this state, the CCD camera 7 moves to both sides of the LCD. However, the marking of the '+' type marking near the vertex is optically detected and the position posture of the LCD is detected and transmitted to the handler controller (not shown).

The handler controller (not shown) moves the fixed block 4 by moving the driving unit 6 up, down, left, and right according to the positional attitude of the LCD detected by the CCD camera 7, thereby moving the fixed block 4 on the work table 5. Align the LCD so that it can be correctly connected to the inspection unit (not shown).

When the alignment between the inspection unit (not shown) and the LCD is made through the alignment operation as described above, the fixed block 4 and the work table 5 move in the Z direction by the operation of the driving unit 6 again, so that the LCD is inspected. A unit (not shown) is connected and a test is performed.

When the test is completed, the fixed block 4 and the work table 5 move to the -Z direction by the operation of the drive unit 6 to return to the initial position, and then by the operation of the pneumatic cylinder 4b. (5) is lowered along the slide rail (4a) to return to the initial mounting position of the LCD, the operator removes the tested LCD and then the other LCD is mounted on the socket portion (5a) again and repeat the above-described process Will be performed.

On the other hand, if the LCD is found to have an external defect while the LCD is connected to the inspection unit (not shown) as described above, and it is impossible to determine the defect with the naked eye, the operator may use a microphone scope for precise inspection. 9) This is confirmed by the bar, when the worker grasps the microscope (9) by hand, the rung (8) is lowered along the L-M guide (12) so that the runner (8) does not apply the force at the desired position It stops in position because the load of the crossbar 8 and the microscope 9 assembly and the elastic force of the spring 10 are balanced as described above.

Subsequently, the operator adjusts the vertical position of the crossbar 8 by turning the handle 13a of the ball screw 13 and by turning the handle 15a of the ball screw 15 provided in the crossbar 8 to the microscope 9. After adjusting the position of the left and right position of the microscope (9) correctly and check the presence of the LCD visually.

As described above, according to the present invention, since the small LCD can be connected to the test unit automatically and accurately, the test reliability and efficiency can be improved.

Claims (8)

A base plate having a rectangular frame shape installed on the main body of the handler; An installation plate having a rectangular frame shape rotatably installed on the front side of the base plate; A fixed block installed between the base plate and the mounting plate; The work piece is provided with a socket for mounting an LCD to be tested, and is installed on the front of the fixing block so as to be movable up and down by means of a slide member so as to move from the LCD long / removable position of the lower part of the mounting plate to the upper LCD test position. Table; Drive means for moving the worktable up and down; An inspection unit installed at a rear side of the installation plate to be connected to an external test device and electrically connected to pads of the LCD on the worktable moved to the test position to test the LCD; And alignment / connection means for aligning the LCD with respect to the inspection unit and connecting the inspection unit when the work table is moved to the LCD test position. The liquid crystal display device of claim 1, further comprising a vision inspection device installed at the upper end of the front side of the main body so as to be movable up and down and left and right to inspect an external defect of the LCD under test. ) Test handler. The apparatus of claim 1 or 2, wherein the alignment / connection means comprises: a pair of optical cameras installed on the mounting plate to optically detect the position of the LCD; It is installed to be coupled to the rear surface of the fixed block on the back side of the base plate, the LCD on the worktable is aligned to the inspection unit by moving the fixed block in an arbitrary direction according to the position of the LCD detected by the optical camera. And a drive unit for connecting. The liquid crystal display (LCD) test handler according to claim 1, wherein the driving means for moving the work table comprises a pneumatic cylinder fixedly mounted to the fixed block so that the rod end thereof is coupled to the work table. According to claim 2, The vision inspection device, both ends are coupled to each of the pair of guide members provided in the front both sides of the main body and a cross bar so as to be movable up and down, so as to be movable laterally to the cross bar. The installed microscope, the vertical drive means for moving the crossbar up and down, the horizontal drive means for moving the microscope sideways along the crossbar, and the crossbar have reached a predetermined position of the main body. Liquid crystal display (LCD) test handler, characterized in that it comprises a support member for supporting the crosspiece at this position. According to claim 5, The vertical drive means is installed up and down on one side of the front portion of the main body, characterized in that the ball screw coupled to one side of the cross, and the ball screw rotating handle is provided on one end of the ball screw. Liquid crystal display (LCD) test handler. The liquid crystal display device according to claim 5, wherein the left and right driving means comprises a ball screw coupled to a microscrew in parallel with a crossbar, and a handle for rotating the ball screw provided at both ends of the ball screw. LCD) test handler. The liquid crystal display (LCD) test of claim 5, wherein the support member is coupled to both sides of the crossbars at both sides of the upper end of the main body, and has a spring force having a spring force corresponding to the load of the crossbars and the microscope. Handler.