KR20070083066A - Apparatus for metering outline dimension of liquid crystal display panel - Google Patents

Abstract

An apparatus for measuring outline dimension of an LCD(Liquid Crystal Display) panel is provided to measure the length of X, Y and Z shafts of the LCD panel, simultaneously or sequentially. A measuring object is seated at a stage(10). The first bar(20) is moved toward the first direction on the stage in order to measure the first length of the measuring object. The second bar(30) is moved toward the second direction crossing the first direction on the stage in order to measure the second length of the measuring object. A sensing sensor is movably embedded in the first bar or the second bar in order to measure the thickness of the measuring object. A guide member(40) fixes the measuring object. The first and second bars are crossed with each other and contacted with the measuring object so that the first and second length is measured. The first bar comprises a body member in parallel to the second direction. An extension member is extended downwardly from the body member. The second bar is moved toward the second direction within a space between the body member and the extension member.

Description

Outer dimension measuring device of liquid crystal display panel {APPARATUS FOR METERING OUTLINE DIMENSION OF LIQUID CRYSTAL DISPLAY PANEL}

1 is a perspective view of an outer dimension measuring apparatus of a liquid crystal display panel according to the present invention.

2A is a sectional view taken along the line A-A of FIG.

FIG. 2B is a cross sectional view taken along the line B-B in FIG. 2A;

3 is a cross-sectional view of the first bar taken along line C-C of FIG.

4 is a view showing a modification of FIG.

5 is a diagram illustrating a measurement process of an outer dimension measuring apparatus of a liquid crystal display panel according to the present invention;

※ Explanation of code for main member of drawing ※

10: stage 11: slot

12: slot 20: first bar

21: body portion 22: extension portion

30: second bar 40: guide part

41: buttons 42a-42c: screen portion

50 liquid crystal display panel

The present invention relates to an outer dimension measuring apparatus of a liquid crystal display panel, and more particularly, to an outer dimension measuring apparatus of a liquid crystal display panel which can measure an outer dimension of a liquid crystal display panel in a short time and is easy to carry.

In general, a liquid crystal display device displays a desired image on a screen by adjusting the amount of light transmitted according to an image signal applied to a plurality of control switches arranged in a matrix form, and displaying a color filter substrate and a thin film transistor (TFT). A liquid crystal display panel for directly displaying an image including a liquid crystal between the substrates, a liquid crystal display panel driving IC for operating the liquid crystal display panel, a flexible printed circuit board electrically connected to the driving IC, and a light source of the liquid crystal display device. A backlight assembly including a backlight used as and a chassis for fastening each component of the liquid crystal display as one.

The liquid crystal display device is completed by combining or assembling in the order of a backlight assembly, a liquid crystal display panel, a liquid crystal display panel driving IC, and a flexible printed circuit board in a chassis. At this time, when the liquid crystal display panel is damaged when the liquid crystal display panel is mounted on the chassis or the mold frame, the liquid crystal display panel is damaged by measuring the outer dimensions of the liquid crystal display panel having the same dimensions to check whether the liquid crystal display panel satisfies the design criteria. .

As described above, in order to measure the outer dimensions of the liquid crystal display panel, the liquid crystal display panel was conventionally measured for each axis by a vernier caliper or a large fixed three-dimensional measuring device based on the X, Y, and Z axes. When the vernier calipers are used, the measurement time is long due to the measurement of each of the X, Y, and Z axes of the liquid crystal display panel, and the three-dimensional measuring device is large and fixed, so convenience is not secured.

Accordingly, an object of the present invention is to provide an outer dimension measuring apparatus of a liquid crystal display panel which is short in measurement time and easy to carry in measuring the outer dimension of the liquid crystal display panel.

An apparatus for measuring an outer dimension of an object to be measured according to the present invention includes a stage on which the object is mounted, a first bar movable in a first direction on the stage to measure a first length of the object to be measured; A second bar movable in a second direction intersecting the first direction on the stage for measuring the length, and movably embedded in the first bar or the second bar for measuring the thickness of the object to be measured; And a sensing part and a guide for fixing the object to be measured, wherein the first bar and the second bar cross each other to contact the object to be measured to measure the first length and the second length.

Here, the first bar is composed of a body portion parallel to the second direction and an extension portion extending downward from the body portion, the second bar in a second direction in the space between the body portion and the extension portion. It is movable. A transfer means for moving the first bar and the second bar is provided inside the stage, and a slot for guiding the movement of the first bar and the second bar is formed in the upper periphery of the stage. Each of the first bar and the second bar further includes a protrusion projecting downwardly from a lower surface thereof and a connection part fixed to the protrusion, wherein the transfer means includes a rotating pulley and a belt wound around the pulley. The first bar and the second bar are moved by being disposed on the conveying means, respectively. The conveying means further comprises a wheel sensor connected to the conveying means via a connecting shaft and having a plurality of openings radially disposed, a wheel sensor including a light emitting part and a light receiving part disposed on front and rear surfaces of the wheel, respectively. The first length or the second length of the measurement object is measured by The sensing sensor moves from one of the upper and lower positions of the first bar or the second bar to another position to measure the thickness of the object to be measured. In addition, the outer dimension measuring apparatus according to the present invention further includes a button for starting the outer dimension measurement of the measured object, and a screen unit for displaying the outer dimension measurement results. The guide portion is preferably in the 'L' shape.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms, and the present embodiments merely make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention. Like numbers refer to like elements in the drawings.

1 is a perspective view of an outer dimension measuring apparatus of a liquid crystal display panel according to the present invention.

Referring to FIG. 1, an apparatus for measuring an outer dimension of a liquid crystal display panel according to an exemplary embodiment of the present invention measures a stage 10 on which a liquid crystal display panel 50 as an object to be measured is seated, and a first length of the liquid crystal display panel 50. A first bar 20 movable in the X-axis direction on the stage 10 and a second bar movable in the Y-axis direction on the stage 10 for measuring a second length of the liquid crystal display panel 50. 30, a sensing sensor 15a or 15b movably embedded in the first bar 20 or the second bar 30 to measure the thickness of the liquid crystal display panel 50, FIGS. 3 and 4. And a guide part 40 for fixing the liquid crystal display panel 50.

In addition, the outer dimension measuring apparatus may include a button 41 for instructing the operation of the first bar 20, the second bar 30, and the detection sensor 15a or 15b, and the X of the liquid crystal display panel 50. And screen sections 42a, 42b, and 42c for displaying Y and Z axis dimensions, respectively.

The stage 10 supports the liquid crystal display panel 50, which is an object to be measured, for which outer dimensions are to be measured. In addition, the stage 10 has slots 11 and 12 for guiding the first bar 20 and the second bar 30, which will be described later, respectively, and are formed at the periphery, and the first bar ( 20 and a transfer means 60 for moving the second bar 30, respectively. On the other hand, one side of the stage 10 is provided with a button 41 and screen portions 42a, 42b, 42c for displaying the X, Y, and Z axis dimensions of the liquid crystal display panel 50, respectively.

The first bar 20 includes a rod-shaped body portion 21 and an extension portion 22 extending downward from both ends of the body portion 21. The lower surface of the body portion 21 of the first bar 20 is always formed below the upper surface of the liquid crystal display panel 50. The first bar 20 is movable toward the liquid crystal display panel 50 in the X direction to measure the X axis length of the liquid crystal display panel 50. The conveying means of the first bar 20 is similar to the conveying means 60 of the second bar 30 and will be described in more detail later with reference to FIGS. 2A and 2B.

The second bar 30 has a rod shape and is movable toward the liquid crystal display panel 50 in the Y direction to measure the Y axis length of the liquid crystal display panel 50. Since the second bar 30 moves in a space formed between the main body 21 and the extension part 22 of the first bar 20, the first bar 20 and the second bar 30 are moved. They can move freely without interfering with each other. As a result, the height of the second bar 30 is always lower than that of the liquid crystal display panel 50.

The sensing sensors 15a, 15b, and FIGS. 3 and 4 may be movably embedded in the first bar 20 or the second bar 30 to measure the thickness of the liquid crystal display panel 50. The detection sensors 15a and 15b will be described later in more detail with reference to FIGS. 3 and 4.

The guide portion 40 is shaped like an 'L', and the edge of the liquid crystal display panel 50 on which the outer dimension is to be measured is fixed to the zero coordinate at the edge of the guide portion 40, that is, the X, Y, and Z coordinates. The liquid crystal display panel 50 is fixed to the zero coordinates by the guide part 40, so that the first bar 20 and the second bar 30 move to adjust the X and Y axis lengths of the liquid crystal display panel 50. The Z axis length, that is, the thickness of the liquid crystal display panel 50 may be measured by the vertical movement of the sensing sensor 15a or 15b. The measurement of the X and Y axis lengths will be described later in more detail with reference to FIGS. 2A and 2B, and the measurement of the Z axis lengths will be described below in detail with reference to FIGS. 3 and 4.

The button 41 is provided at one side of the stage 10, and the first bar 20, the second bar 30, and the sensing sensor 15a or 15b are operated by pressing the button 41. The outer dimensions of the liquid crystal display panel 50 are measured. The display units 42a, 42b, and 42c display values obtained by measuring the outer dimensions of the liquid crystal display panel 50 by the first bar 20, the second bar 30, and the sensing sensor 15a or 15b.

FIG. 2A is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 2B is a cross-sectional view taken along the line B-B of FIG. 2A.

Referring to FIGS. 2A and 2B, a protrusion 31 and a connecting portion 32 formed integrally with the protrusion 31 or fixed as a separate member are fixed to a lower surface of one side of the second bar 30. Is formed. The protrusion part 31 is inserted into the slot 12 formed in the upper portion of the stage 10 in parallel to the Y axis direction to guide the movement of the second bar 30. Protrusions (not shown) and connecting portions (not shown) corresponding to the protrusions 31 and the connecting portion 32 are formed on the lower surface of the other side of the second bar 30, and the stage 10 is correspondingly provided. In addition, a slot (not shown) for guiding the second bar 30 is formed. The conveying means 60 provided in the stage 10 for moving the second bar 30 includes two pulleys 61 and a belt 62 wound around them. As the pulley 61 is rotated by a motor (not shown), the belt 62 moves, and the connecting portion 32 supported on the belt 62 moves linearly so that the second bar 30 moves. do. Referring to FIG. 2B, the pulley 61 is formed with a recess 61a on the surface of the pulley 61 so as not to detach the belt 62. The pulley 61 is connected to the wheel sensor 63 through a connecting shaft 64. The wheel sensor 63 includes a wheel 65 having a plurality of radial openings 66 formed therein, a light emitting part 67 emitting light in a predetermined direction, and light emitted from the light emitting part 67. And a light receiving portion 68 capable of receiving light through 66. Due to the wheel sensor 63, the length of the second bar 30 until the second bar 30 moves in the Y-axis direction and contacts the liquid crystal display panel 50 is the movement of the belt 62 wound around the pulley 61. The length of the belt 62 may be accurately measured from the number of times that the light receiving unit 68 of the wheel sensor 63 receives light from the light emitting unit 67.

3 is a cross-sectional view of the first bar taken along line C-C of FIG. 1.

Referring to FIG. 3, the extension part 22 of the first bar 20 includes a detection sensor 15a moving from top to bottom to measure the Z axis length, that is, the thickness of the liquid crystal display panel 50. . Although not shown in FIG. 3, the detection sensor 15a is provided with a light emitting unit for emitting light and a light receiving unit for receiving the reflected light reflected by the light emitted from the light emitting unit. A thickness measurement process of the liquid crystal display panel 50 by the detection sensor 15a will be described later in more detail with reference to FIG. 5.

4 is a diagram illustrating a modification of FIG. 3. The modified embodiment shown in FIG. 4 is the same as the embodiment shown in FIG. 3 except that the sensor 15b moves from the bottom up.

5 is a diagram illustrating a measurement process of an outer dimension measuring apparatus of a liquid crystal display panel according to the present invention.

Referring to FIG. 5, the outer dimension measuring apparatus of the liquid crystal display panel starts to measure the outer dimension of the liquid crystal display panel 50 by pressing the button 41. First, the length of the liquid crystal display panel 50 in the Y axis direction is measured as follows. The distance that the second bar 30 can move in the Y axis direction is b, and the liquid crystal display panel 50 is moved in the Y axis direction by the moving means 60 provided in the stage 10. Moving toward, and contacting the liquid crystal display panel 50, the distance traveled until the second bar 30 contacts the liquid crystal display panel 50 at an initial position is connected to the wheel sensor 63 connected to the pulley 61. Is calculated exactly. If the moving distance is assumed to be b ', the Y-axis length of the liquid crystal display panel 50 is (b-b').

As in the Y-axis length measurement process of the liquid crystal display panel 50 by the second bar 30, the distance that the first bar 20 can move in the X-axis direction is a, and the first bar 20 is When the first bar 20 moves toward the liquid crystal display panel 50 in the X-axis direction and contacts the liquid crystal display panel 50 by an unillustrated transfer means provided in the stage 10, the first bar 20 is the liquid crystal at the initial position. The distance traveled until contact with the display panel 50 is accurately calculated by a wheel sensor connected to a pulley (not shown). If the moving distance is assumed to be a ', the X-axis length of the liquid crystal display panel 50 is (a-a').

3 and 5, the Z axis length, that is, the thickness of the liquid crystal display panel 50 is measured by a sensing sensor 15a embedded in the extension part 22 of the first bar 20. In more detail, the sensing sensor 15a operates during the stop or movement of the first bar 20 to move from the upper surface of the extension portion 22 to the lower surface. The light from the light emitting unit is not reflected to the light receiving unit at a position higher than the thickness of the liquid crystal display panel 50 while the detection sensor 15a moves from the upper surface of the extension portion 22 to the lower surface. While the sensing sensor 15a is moved downward, the position at which light from the light emitting unit is reflected from the liquid crystal display panel 50 and begins to be reflected to the light receiving unit is accurately measured so that the sensing sensor 15a is moved from top to bottom. The distance can be measured accurately. In this case, assuming that the overall height of the first bar 20 is c and the distance that the sensing sensor 15a moves from top to bottom is d ', the thickness of the liquid crystal display panel 50 is (c-d ')to be. Here, of course, when measuring the thickness of the liquid crystal display panel 50, the distance between the upper surface of the extension part 22 and the light emitting part of the sensing sensor 15a and the light receiving part should be considered.

As described above, the outer dimension measuring apparatus according to the present invention is easy to carry, and since the outer dimension of the liquid crystal display panel as the measurement object can be measured at one time, the time required for measuring the outer dimension of the liquid crystal display panel can be shortened. .

In measuring the X, Y, and Z axis lengths in the outer dimension measuring apparatus of the liquid crystal display panel according to the present invention, the measurement order of the outer dimensions may be performed simultaneously or sequentially.

Meanwhile, in the exemplary embodiment of the present invention, the sensing sensor 15a or 15b is formed on the first bar 20, but the present invention is not limited thereto and is movable in a portion protruding from the second bar 30. Naturally, the thickness of the liquid crystal display panel 50 may be measured.

In addition, the exemplary embodiment of the present invention illustrates that the guide portion 40 has an 'L' shape, but the present invention is not limited thereto, and the structure capable of fixing the liquid crystal display panel 50 to measure the outer dimensions is not limited thereto. Any form is possible.

Since the outer dimensions of the liquid crystal display panel can be simultaneously measured by the outer dimension measuring apparatus of the liquid crystal display panel according to the present invention, the outer dimensions of the liquid crystal display panel can be measured in a short time.

In addition, the outer dimension measuring apparatus of the liquid crystal display panel according to the present invention is easy to carry.

Claims (8)

In the outer dimension measuring device of the measurement object, A stage on which the measurement object is seated, A first bar movable in a first direction on the stage for measuring a first length of the object to be measured, A second bar movable in a second direction crossing the first direction on the stage for measuring a second length of the object to be measured, A sensing sensor movably embedded within the first bar or the second bar for measuring the thickness of the object to be measured, and A guide part for fixing the object to be measured, Characterized in that the first and second bars measure the first length and the second length by crossing each other and contacting the object to be measured. Device for measuring external dimensions of the object under test. The method according to claim 1, The first bar includes a body portion parallel to the second direction and an extension portion extending downward from the body portion, wherein the second bar is movable in a second direction in a space between the body portion and the extension portion. Characterized in that, Device for measuring external dimensions of the object under test. The method according to claim 1, The stage is provided with a transfer means for moving the first bar and the second bar, respectively, and the upper periphery of the stage is formed with a slot for guiding the movement of the first bar and the second bar. Made, Device for measuring external dimensions of the object under test. The method according to claim 3, Each of the first bar and the second bar further includes a protrusion projecting downwardly from a lower surface thereof and a connection part fixed to the protrusion, wherein the transfer means includes a rotating pulley and a belt wound around the pulley. Characterized in that the first bar and the second bar are moved by being disposed on the transfer means, respectively, Device for measuring external dimensions of the object under test. The method according to claim 3, The conveying means further comprises a wheel sensor connected to the conveying means via a connecting shaft and having a plurality of openings radially disposed, and a light sensor and a light receiving portion disposed on front and rear surfaces of the wheel, respectively. Characterized in that the first length or the second length of the object to be measured is measured by the wheel sensor. Device for measuring external dimensions of the object under test. The method according to claim 1, Wherein the sensing sensor moves from one of the upper and lower positions of the first bar or the second bar to another position to measure the thickness of the object to be measured, Device for measuring external dimensions of the object under test. The method according to claim 1, Further comprising a button for starting the outer dimension measurement of the object to be measured, and a screen unit for displaying the outer dimension measurement results, Device for measuring external dimensions of the object under test. The method according to claim 1, The guide portion is characterized in that the 'L' shape, Device for measuring external dimensions of the object under test.

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