Substrate loading device of liquid crystal display device and loading method thereof

专利摘要:
PURPOSE: A substrate reception apparatus and a method for an LCD(Liquid Crystal Display) are provided to prevent the static electricity induced to the substrate by maintaining a constant distance always between the cassette and the substrate. CONSTITUTION: A slit(350) is formed on a substrate support(320) formed on a side of the cassette(330). Sensing devices(360a,360b) are mounted to upper and lower portions of the inside of the cassette(330). The sensing devices(360a,360b) comprises a light emitting sensor(360a) and a light receiving sensor(360b). The light emitting sensor(360a) and the light receiving sensor(360b) are connected to an alarm generating device(370). When a substrate(340) is received to the cassette(340) normally, the light emitted from the light emitting sensor(360a) is progressed straightly and then received by the light receiving sensor(360b).
公开号:KR20040044717A
申请号:KR1020020072863
申请日:2002-11-21
公开日:2004-05-31
发明作者:박지웅
申请人:엘지.필립스 엘시디 주식회사；
IPC主号:

专利说明:

Substrate storage device and substrate storage method of liquid crystal display device {SUBSTRATE LOADING DEVICE OF LIQUID CRYSTAL DISPLAY DEVICE AND LOADING METHOD THEREOF}
[15] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate storage device and a substrate storage method of a liquid crystal display device, and more particularly, to a substrate storage device of a liquid crystal display device having sensing means to prevent generation of static electricity by contacting a side surface of the substrate storage device. An apparatus and a substrate storage method are provided.
[16] Currently, the liquid crystal display device (TFT-LCD), which is the flagship product of flat panel displays, has rapidly developed in size and high resolution due to the mass production technology and the result of research and development. As it gradually replaces conventional cathode ray tube (CRT) products, its proportion in the display device industry is gradually increasing. In today's information society, the display device is more and more important as a visual information transmission medium. In particular, with the trend of light, thin, short, and small in all electronic products, the importance of low power consumption, thinness, light weight, high definition, and portability is increasing. Since the liquid crystal display device is a display device having not only performance that can satisfy these conditions of a flat panel display but also mass production, various kinds of new products are rapidly created, which has a ripple effect over semiconductors in the electronic industry.
[17] The manufacturing process of the liquid crystal display device as described above comprises a series of processes for forming a liquid crystal cell between a TFT array substrate and a color filter substrate completed through different manufacturing processes. The flow of the liquid crystal cell process starts with an alignment film coating and rubbing process for arranging liquid crystal molecules in a predetermined direction with respect to the TFT array substrate and the color filter substrate, respectively.
[18] In the TFT array substrate, a short pattern is formed for printing a seal pattern for injecting liquid crystal and for connecting a common electrode terminal of the color filter substrate to a bonding pad of the TFT array substrate. Spacers are disposed on the color filter substrate to maintain a constant cell gap. The two substrates are then aligned and bonded to each other and then cut and separated into their respective panels. After the liquid crystal is injected into each panel, the injection hole is sealed, and after the simple on-off test of the liquid crystal cell, only the good product is selected and the polarizing plate is attached to the manufacturing process.
[19] As described above, since the manufacturing process of the liquid crystal display device is connected to different unit processes, the equipment for performing each unit process is different, and the substrate storage device accommodates the substrate for transporting the substrate of the liquid crystal display device to these devices. Will be needed.
[20] 1 is a perspective view showing a substrate storage device and a robot for loading or unloading a substrate from the substrate storage device.
[21] As shown, the cassette 110 in which the substrate 240 is accommodated is placed on a loader 120 so that the substrate 240 is loaded into or out of the cassette 110 by the robot 130. The plurality of supports 210 are formed on both side walls of the cassette 110, and the substrate 150 is accommodated between the supports 210.
[22] The robot 130 is composed of a support part 132, a rotating part 134, and a robot arm 136 connected to the rotating part 134. The support 132 may be adjusted in height to wear or leave a substrate at a desired position.
[23] 2A and 2B are front and partial perspective views showing a cassette of the substrate storage device.
[24] 2A illustrates a state in which a substrate is accommodated in the cassette 110, and FIG. 2B illustrates only a side surface of the cassette 110.
[25] As shown in the figure, a substrate support 210 for supporting the substrate 240 is formed at a predetermined interval on the side of the cassette 110 to constitute a plurality of slots. The substrate 240 is accommodated on the substrate support 210.
[26] The substrate 110 is accommodated in the cassette 110, and the substrate is received or shipped by the robot. The width t of the substrate support 220 which is formed in the cassette 110 and accommodates the substrate 240 is about 5 mm.
[27] When the substrate 240 is accommodated in the cassette 110, the substrate 240 is actually supported by a portion of the substrate support 220 instead of being positioned over the entire width t of the substrate support 220. The distance between both sides of the cassette 110 and the accommodated substrate 240 is about 2 mm.
[28] However, the robot carrying the substrate 240 may not maintain its initial state due to loosening of the fastening portion or deterioration of the driving portion due to prolonged use. Therefore, an error occurs when the substrate 240 is stored. As a result, the distance between the substrate 240 and both sides of the cassette 110 is smaller than 2 mm, and the substrate 240 contacts the side surface of the cassette 110. When friction occurs, static electricity is generated on the substrate 240.
[29] It is known that TFT devices used in TFT arrays are very susceptible to static electricity and gate insulating films are easily destroyed by induced static electricity. Therefore, it is necessary to prevent static electricity from being induced on the substrate 240. The process of accommodating the substrate 240 in the cassette 110 is performed after the liquid crystal panel is inspected.
[30] In addition, since the distance between the substrate 240 and the side surface of the cassette 110 was made by the human eye, it was difficult to correct this and to place the substrate 240 at the center of the cassette 110.
[31] As described above, the conventional substrate storage apparatus of the liquid crystal display device does not effectively cope with static electricity induced on the substrate by the contact between the substrate and the cassette.
[32] Accordingly, an object of the present invention is to prevent static electricity induced on a substrate by keeping the cassette and the substrate at a constant distance at all times.
[1] 1 is a perspective view showing a substrate storage device of a liquid crystal display device.
[2] 2A is a front view of a cassette used in a conventional substrate storage device.
[3] FIG. 2B is an enlarged fragmentary view of a portion of FIG. 2A; FIG.
[4] 3A is a partial perspective view of the substrate storage apparatus according to the first embodiment of the present invention.
[5] 3B is a partial front view of the substrate storage apparatus according to the first embodiment of the present invention.
[6] 4A is a partial perspective view of a substrate storage apparatus according to a second embodiment of the present invention.
[7] 4B is a cross-sectional view showing a cross section of the substrate storage apparatus according to the second embodiment of the present invention.
[8] 5 is a partial perspective view of a substrate storage apparatus according to a third embodiment of the present invention.
[9] 6 is a partial perspective view of a substrate storage apparatus according to a fourth embodiment of the present invention.
[10] *** Explanation of symbols for main parts of drawing ***
[11] 110,330: cassette 120: loader
[12] 130: robot 220,320: substrate support
[13] 240,340: substrate 370: alarm generating device
[14] 360a, 360b, 460a, 460b, 470a, 470b 660a, 660b: sensing means
[33] In order to achieve the above object, the present invention includes a cassette in which a plurality of substrate supports are formed on both sides thereof to accommodate a substrate; And it provides a substrate storage device of the liquid crystal display device comprising a sensing means for detecting the position of the substrate accommodated in the cassette. The sensing means is preferably composed of a light emitting sensor and a light receiving sensor.
[34] The substrate support is preferably formed with a slit at a position spaced apart from the both sides, the sensing means is preferably formed in the upper and lower portions of the side of the cassette consists of a sensor facing through the slit. The sensing means detects the side position of the substrate accommodated in the cassette.
[35] The sensing means may be installed on the upper and lower portions of the rear surface of the cassette to detect the rear position of the substrate.
[36] The sensing means may be installed to move left and right to detect positions of all edge portions of the substrate.
[37] At least two sensing means may be installed at each side to detect an inclination of the stored substrate.
[38] It is preferable to further include an alarm generating device connected to the sensing means for generating an alarm when the substrate approaches the wall surface of the cassette closer than a predetermined interval.
[39] In addition, the present invention to achieve the above object is a cassette formed with a slit on the outer surface of the bottom and top; A plurality of substrate supports having slits formed thereon to be attached to side surfaces of the cassette to support the substrates; A plurality of sensing means installed outside of the cassette so as to face through the slit of the cassette and the substrate support; It is connected to the sensing means provides a substrate storage device of the liquid crystal display device comprising an alarm generating device for generating an alarm when the substrate approaches the wall surface inside the cassette closer than a predetermined interval.
[40] In addition, the present invention comprises the steps of accommodating a substrate in a cassette to achieve the above object; Sensing the position of the substrate; And generating an alarm when the substrate approaches the side of the cassette within a predetermined interval as a result of the sensing step.
[41] In the sensing step, it is preferable to detect the position of the middle portion or the position of the edge of the substrate.
[42] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[43] 3A and 3B are a perspective view and a front view showing a side of the substrate storage apparatus according to the first embodiment of the present invention.
[44] As shown in the present invention, the substrate storage device of the present invention has a slit 350 formed on the substrate support 320 formed on the side surface of the cassette 330. The substrate support 320 is made wider than the width of the support used in the conventional cassette and forms the slit 350 inside the substrate support 320. For example, the width d ₁ of the substrate support 320 may be 10 mm, and the width d ₂ of the slit 350 may be 5 mm.
[45] In addition, sensing means 360a and 360b are provided at upper and lower portions of the cassette 330. The figure shows only the left side when the sensing means 360a and 360b are provided on the upper and lower parts of the left side and the upper and lower parts of the right side. The case where the sensing means (360a, 360b) is located in the center of the slit 350 is shown.
[46] The sensing means 360a and 360b include a light emitting sensor 360a and a light receiving sensor 360b. When the light emitting sensor 360a is installed at the top, the light receiving sensor 360b is installed at the bottom, and when the light emitting sensor 360a is installed at the bottom, the light receiving sensor 360b is installed at the top. The light emitting sensor 360a and the light receiving sensor 360b operate in one set. The light emitting sensor 360a and the light receiving sensor 360b are connected to an alarm generating device 370.
[47] When the substrate 340 is normally stored in the cassette 330, the light generated by the light emitting sensor 360a goes straight and enters the light receiving sensor 360b. However, when the substrate 340 is not accommodated in the center of the cassette 330 and is accommodated in one side and covers the slit 350 of the support 320 formed on one side, the light generated by the light emitting sensor 360a is blocked. It does not enter the light receiving sensor 360b.
[48] When the light from the light emitting sensor 360a does not enter the light receiving sensor 360b, a signal is generated from the light receiving sensor 360b to generate an alarm by the alarm generator 370.
[49] The alarm generating device 370 may be any device capable of warning the user. For example, an alarm may be generated or a flickering signal may be transmitted to the user using a light emitting device.
[50] When the alarm occurs, the substrate 340 is stopped and the movement of the robot accommodating the substrate 340 is corrected to allow the substrate 340 to be stored in the center of the cassette 330.
[51] 4A and 4B show a substrate storage apparatus according to a second embodiment of the present invention.
[52] As shown in FIG. 4A, in the substrate storage device of the second embodiment, unlike the substrate storage device of the first embodiment, two light emitting sensors 460a and 470a and a light receiving sensor 460b and the upper and lower portions of the cassette 330 are respectively provided. 470b) is installed. At both ends of each substrate support 320, two holes 350 are formed in which the light emitting sensors 460a and 470a and the light receiving sensors 460b and 470b are aligned, so that the light generated from the light emitting sensors 460a and 470a is formed. The light is incident on the light receiving sensors 460b and 470b through the hole 350.
[53] As described above, two light emitting sensors 460a and 470a and light receiving sensors 460b and 470b are installed at both ends of the cassette 330 as follows.
[54] In the case of the substrate storage device of the first embodiment, only one light emitting sensor and one light receiving sensor are installed on one side of the cassette 330 so that the substrate 340 is centered in the center as shown in FIG. 4B or the position where the sensor is installed. When tilted by θ, the center of the substrate 340 is not detected, but there is a concern that both ends may contact the side of the cassette 330. Therefore, in the second embodiment, this concern by forming the sensors 460a, 460b, 470a, 470b corresponding to both ends of the substrate 340 at the upper and lower ends of the cassette 330 to sense the positions of the four corners of the substrate 340. To prevent it. That is, the degree of inclination of the substrate 340 (the inclination of the substrate) is detected.
[55] The first light emitting sensor 460a and the first light receiving sensor 460b detect the position of one end of the substrate positioned at the inlet of the cassette, and the second light emitting sensor 470a and the second light receiving sensor 470b are positioned at the other end of the substrate. Detect it.
[56] 5 shows a substrate storage apparatus according to a third embodiment of the present invention.
[57] Although the structure is the same as the substrate storage device of the first embodiment, a motor is installed in the light emitting sensor 360a and the light receiving sensor 360b so that the light emitting sensor 360a and the light receiving sensor 360b are side by side. Reciprocating motion in the direction of the arrow with the slit 350 formed in between. At this time, the light emitting sensor 360a and the light receiving sensor 360b move in conjunction with each other.
[58] As described above, when the movable sensor is used, the same effect as using a plurality of sensors can be achieved, and thus the position of the entire substrate can be detected.
[59] 6 is a perspective view showing the inside of the substrate storage apparatus according to the fourth embodiment of the present invention.
[60] In the fourth embodiment, as in the first to third embodiments, the sensing means 360a and 360b are installed at the upper side of the cassette 330, and the sensing means 660a and 660b are installed at the upper and lower sides of the rear side of the cassette. have. This is because the substrate 340 contacts the back side of the cassette 330 as well as the side of the cassette 330, so that static electricity may be generated.
[61] When the substrate approaches the rear surface of the cassette 330 within a predetermined distance, the sensing means 660a and 660b are detected and an alarm is generated by the alarm generating device 370.
[62] In the fourth embodiment, as described in the third embodiment, the sensing means 660a and 660b installed on the upper side of the rear side of the cassette 330 are moved left and right so that one edge of the substrate 340 is the rear side of the cassette 330. Can be prevented from contacting
[63] The sensing means used in the substrate storage apparatuses described in the first to fourth embodiments may be installed inside the cassette or may be installed outside the cassette. When the sensing means is installed outside the cassette, slits or holes are formed on the bottom and top of the cassette so that light generated from an external light emitting sensor is incident on the light receiving sensor through the bottom, top and slit or holes of the substrate support. do. If the sensing means is installed outside the cassette, it is possible to reduce the installation cost by installing the sensing means by aligning the slit or hole formed in the cassette at the place where the cassette is located without having to install the sensing means for each cassette.
[64] According to the present invention, when the sensor senses the position of the substrate in the cassette and the substrate is in contact with the cassette, an alarm is generated to correct the robot that carries the substrate early. Conventionally, since the position of the substrate was incorrectly measured by the naked eye, the defective products due to static electricity were used in mass production, but the present invention has the effect of preventing this in advance.
[65] Many details are set forth in the foregoing description, but they should be construed as preferred embodiments rather than limiting the scope of the invention. For example, placement of the sensor in the cassette may be any combination of the above embodiments or any position as long as it can only detect the position of the substrate. Therefore, the scope of the invention should not be defined by the described embodiments, but should be defined by the claims and the equivalents of the claims.

权利要求:
Claims (14)
[1" claim-type="Currently amended] A cassette having a plurality of substrate supports formed on both sides thereof to accommodate the substrate; And
And a sensing means for sensing a position of a substrate accommodated in the cassette.
[2" claim-type="Currently amended] The substrate storage device of claim 1, wherein the sensing means comprises a light emitting sensor and a light receiving sensor.
[3" claim-type="Currently amended] The substrate storage apparatus of claim 1, wherein the sensing unit is installed at a side of the cassette to sense a side position of the substrate.
[4" claim-type="Currently amended] According to claim 3, The substrate support is formed with a slit at a position spaced apart from the both sides,
The sensing means is installed in the upper and lower portions of the cassette substrate storage device of the liquid crystal display device, characterized in that consisting of a sensor facing through the slit.
[5" claim-type="Currently amended] The substrate storage apparatus of claim 1, wherein the sensing unit is installed at upper and lower portions of the rear surface of the cassette to sense a position of the rear surface of the substrate.
[6" claim-type="Currently amended] 6. A substrate storage apparatus for a liquid crystal display device as claimed in claim 3 or 5, wherein the sensing means is provided in the middle of the side or the back of the cassette.
[7" claim-type="Currently amended] The apparatus of claim 1, wherein the sensing means is installed to move left and right.
[8" claim-type="Currently amended] The substrate storage apparatus of claim 1, wherein at least two sensing means are installed at each side to detect an inclination of the stored substrate.
[9" claim-type="Currently amended] The apparatus of claim 1, further comprising an alarm generating device connected to the sensing means to generate an alarm when the substrate approaches the wall of the cassette closer than a predetermined distance.
[10" claim-type="Currently amended] A cassette in which a plurality of substrate supports on which slit is formed are formed on both sides thereof to accommodate the substrate;
First sensing means comprising a light emitting sensor and a light receiving sensor installed at upper and lower sides of the cassette side to face each other through the slits, and detecting a side position of the received substrate; And
And a second sensing means comprising a light emitting sensor and a light receiving sensor installed at upper and lower portions of the rear surface of the cassette to sense a position of the rear surface of the substrate.
[11" claim-type="Currently amended] A cassette in which slits are formed on the outer side of the bottom and top surfaces;
A plurality of substrate supports having slits formed thereon to be attached to side surfaces of the cassette to support the substrates;
A plurality of sensing means installed outside of the cassette so as to face through the slit of the cassette and the substrate support;
And an alarm generating device connected to the sensing means to generate an alarm when the substrate approaches the wall surface of the cassette closer than a predetermined distance.
[12" claim-type="Currently amended] Storing the substrate in a cassette;
Sensing the position of the substrate; And
And generating an alarm when the substrate approaches the side of the cassette within a predetermined interval as a result of the sensing step.
[13" claim-type="Currently amended] The method of claim 12, wherein the sensing step detects a position of an intermediate portion of the substrate.
[14" claim-type="Currently amended] The method of claim 12, wherein the sensing step detects a position of an edge of the substrate.

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同族专利:

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引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2002-11-21|Application filed by 엘지.필립스 엘시디 주식회사

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2002-11-21|Priority to KR1020020072863A

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2004-05-31|Publication of KR20040044717A

优先权:

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申请号 | 申请日 | 专利标题

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KR1020020072863A|KR20040044717A|2002-11-21|2002-11-21|Substrate loading device of liquid crystal display device and loading method thereof|