TWI220454B - Method for inspecting alignment layer and equipment thereof - Google Patents

Abstract

A method for inspecting an alignment layer and an equipment thereof are described. Firstly, an alignment layer test sample is placed in a chamber. Then, the alignment layer test sample is steamed up by using a steam generator, and the alignment layer test sample is lighted up with an intense light for visual inspection.

Description

1220454 _Case No. 92100215_ Revised Year of the Month _ V. Description of the Invention (1) Field of the Invention The present invention relates to a method and equipment for inspecting an alignment film, and in particular, to a method capable of inspecting visually directly Method and equipment for alignment film of liquid crystal display (LCD). The prior art liquid crystal display has the advantages of southern picture quality, small size, light weight, low voltage driving, low power consumption and wide application range. Therefore, it has been widely used in medium and small portable TVs, mobile phones, Consumer electronics or computer products such as camcorders, notebook computers, desktop displays, and projection televisions have gradually replaced cathode ray tubes (CRT) and become mainstream displays. The liquid crystal display is mainly composed of two substrates and a liquid crystal layer disposed between the two substrates. In addition, an alignment film is usually disposed on the surfaces of the two substrates (the surface in contact with the liquid crystal layer), and the alignment film disposed on the substrates undergoes a grinding process to form a plurality of grooves on the surfaces. As a result, the liquid crystal molecules are aligned along the grooves on the alignment film. The polishing process of the alignment film is described below. Figure 1 shows a schematic diagram of the polishing process of an alignment film. Referring to FIG. 1, a method for forming a plurality of grooves on an alignment film by using a grinding process is to first place a substrate 100 having an alignment film 102 formed in a polishing machine. After that, one of the rollers (Roller) 104 is used to polish the alignment film 102, and the surface of the alignment film 102 is shaped.

9773twf1.ptc Page 5 1220454 _ Case No. 92100215_ Year Month Revision _ 5. Description of the invention (2) into many grooves 106. Generally, after the alignment film is subjected to the grinding process, an inspection step is performed to check whether the positions and lengths of the grooves on the alignment film meet the standards, and whether there are other abnormal patterns on the surface of the alignment film are also engraved On the alignment film. If the grooves on the surface of the alignment film can be found immediately, or if abnormal patterns appear on the alignment film due to the micro particles attached to the rollers of the grinding process, the staff can rely on the abnormal conditions. Immediately inspect and repair the grinding machine or adjust the parameters to avoid affecting the subsequent products. At present, most methods for inspecting the alignment film use an optical inspection instrument to perform the inspection steps of the alignment film. However, this optical spectroscopic inspection instrument is very expensive, and since the conventional inspection method uses optical instruments to inspect, many tedious steps such as calibration and alignment of the instrument must be performed. In addition, there is currently no simple and effective visual inspection equipment and method to quickly determine the results of the alignment film after grinding. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method and equipment for inspecting an alignment film of a liquid crystal display to improve the conventional method and equipment for inspecting an alignment film, which have the disadvantages of being expensive and complicated. The purpose of the present invention is to provide a method and equipment for inspecting an alignment film of a liquid crystal display, so as to provide an inspector to directly and quickly inspect the alignment film in a visual manner. The invention provides a method for inspecting an alignment film of a liquid crystal display. This method firstly places an alignment film test piece in a detection chamber. among them,

9773twf1.ptc Page 6 1220454 _Case No. 92100215_ Revised Year of the Month _ V. Description of the invention (3) The surrounding of this testing room is covered with a black curtain that is opaque, air-impermeable and non-reflective, in order to block external light and air flow. Interference is blocked. Since the alignment film test piece has undergone a grinding process, many grooves have been formed on the surface of the alignment film test piece. Next, the alignment film test piece is atomized. The method for atomizing the alignment film test piece is to place the alignment film test piece on a steam generator, and use the steam generated by the steam generator to atomize the alignment film. . Afterwards, an alignment film test piece is irradiated with a strong light, and the alignment film test piece table is visually inspected for abnormalities, in other words, the length and spacing of the grooves on the alignment film test piece are visually inspected Meet the standard, and check whether there are other abnormal pattern marks on the surface of the alignment film test piece. The invention provides a device for inspecting an alignment film of a liquid crystal display, which includes a detection chamber, a steam generator, and a strong light. Among them, the detection room is composed of a sturdy frame, and the sturdy frame is also covered with a black curtain that is opaque, air-permeable and non-reflective to block out external light and airflow interference. In addition, the steam generator is placed in the detection room, and one of the alignment film test pieces to be tested is placed on the steam generator, so that the steam generated by the steam generator can atomize the alignment film test piece. The glare lamp is placed in the detection room, and the glare lamp directly illuminates this alignment film test piece, thereby assisting in easily viewing the alignment film test when viewing the atomized alignment film test piece visually. Are there any abnormalities on the surface of the film? The method for inspecting the alignment film of a liquid crystal display of the present invention can directly inspect the alignment film under strong light after the alignment film is atomized.

9773twf1.ptc Page 7 1220454 _Case No. 92100215_Year Month Date__ V. Description of the invention (4) Whether there is any abnormality on the alignment film, so the method of the invention has the advantages of fast and simple. Since the device for inspecting the alignment film of a liquid crystal display of the present invention only needs a steam generator and a strong light, and does not require expensive optical inspection instruments, it is much cheaper than a conventional inspection device. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below in conjunction with the accompanying drawings to make a detailed description as follows: FIG. 2 shows an embodiment A schematic diagram of an apparatus for inspecting an alignment film according to a preferred embodiment of the present invention. Referring to FIG. 2, the detection device of the alignment film of this embodiment includes a detection chamber 200, a steam generator 204, and a strong light lamp 208. Among them, the detection chamber 2 0 0 is composed of a solid frame, and a black curtain 2 2 is covered around the solid frame. The black curtain 2 2 is a black cloth which is light-proof, air-permeable and non-reflective. Curtain material to block outside light and airflow interference. The steam generator 2 0 4 is placed in the detection room 200, and one of the alignment film test pieces 2 6 to be tested is placed above the steam generator 2 0 4 so that the steam generator 2 0 4 generates The steam can atomize the alignment film test piece 206. Among them, the alignment film test piece 206 has undergone a grinding process, so many grooves have been formed on the surface of the alignment film test piece 206. The steam generator 204 is further connected to a power supply 210, which is used to supply power to the steam generator 204.

9773twf1.ptc Page 8 1220454 _Case No. 92100215_ Year Month Amendment _5. Description of the invention (5) In addition, the 280 light series is placed in the detection room 280, and the 280 light series is Directly irradiate this alignment film test piece 206. The high-intensity lamp 208 is also connected to the power supply 210, which is used to supply power to the high-intensity lamp 208. After irradiating the alignment film test piece 206 with this strong light lamp 208, it is possible to directly visually check whether there is an abnormality on the surface of the atomized alignment film test piece 206. The so-called abnormal phenomenon such as Whether the length and pitch of the grooves on the alignment film test sheet 206 meet the standard, and whether there are other abnormal pattern marks on the surface of the alignment film test sheet 206. As shown in FIG. 3, the inspector picks up the atomized alignment film test piece 206 and directly inspects it visually. Because the groove on the atomized alignment film test piece 206 will be apparent. Come out, plus the assistance of a strong light lamp 2008, so the inspector can easily visually check whether the grooves on the surface of the alignment film test strip 2 06 are abnormal or have other abnormal scratch patterns. If the inspector finds that there is an abnormality on the surface of the alignment film test piece 206, he can immediately adjust the parameters of the grinding process or carry out the inspection and maintenance of the grinding machine according to the abnormal conditions to ensure that subsequent products will not be affected. Make an impact. FIG. 4 is a flowchart of an inspection alignment film according to a preferred embodiment of the present invention. Referring to FIG. 4, a method for inspecting an alignment film of a liquid crystal display by using the inspection device of the present invention is to first place an alignment film test piece in a detection chamber (step 400). Among them, the surrounding of the detection chamber is covered with a black curtain which is opaque, air-permeable and non-reflective, so as to shield the external light and

9773twf1.ptc Page 9 1220454 _Case No. 92100215_ Year Month and Day _ «V. Description of the invention (6) Airflow interference is blocked. Moreover, the alignment film test piece has gone through a grinding process, so many grooves have been formed on the surface of the alignment film test piece. Next, the alignment film test piece is atomized (step 402). The method for atomizing the alignment film test piece is, for example, placing the alignment film test piece on a steam generator, and using the steam generated by the steam generator To atomize the alignment film. After that, the alignment film test piece is irradiated with a strong light (step 404). Then directly visually inspect the alignment film test piece (step 406). In other words, after irradiating the atomized alignment film test piece with strong light, you can directly visually inspect the surface of the alignment film test piece. Are there any abnormal phenomena, such as checking whether the length and spacing of the grooves on the alignment film test sheet meet the standards, and checking whether there are other abnormal pattern marks on the surface of the alignment film test sheet. If it is found that there is an abnormality on the surface of the alignment film test piece in step 406, you can immediately adjust the parameters of the grinding process or perform the inspection and maintenance of the grinding machine according to the abnormal conditions to ensure that the subsequent products are not Will be affected. Therefore, the method and equipment for inspecting the alignment film of a liquid crystal display of the present invention can directly inspect whether there is an abnormality on the alignment film under strong light irradiation after the alignment film test piece is atomized. The invention is a simple and fast visual inspection method and device, which has the advantages of being fast and simple. The method and device for inspecting an alignment film of a liquid crystal display of the present invention are provided by

9773twf1.ptc Page 10 1220454 _ Case No. 92100215_ Year Month Date __ V. Description of the invention (7) Since it only needs a steam generator and a strong light lamp, and does not require expensive optical inspection equipment, the present invention is more familiar. Known inspection equipment and methods are much cheaper. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. The scope of protection shall be determined by the scope of the attached patent application.

9773twf1.ptc Page 11 1220454 _ Case No. 92100215_ Year Month Day __ Brief description of the diagram Figure 1 shows a schematic diagram of the grinding process of an alignment film; Figure 2 is a preferred method according to the present invention Schematic diagram of an apparatus for inspecting an alignment film according to an embodiment; FIG. 3 is a schematic diagram of inspecting an alignment film visually according to a preferred embodiment of the present invention; and FIG. 4 is an inspection of an alignment membrane according to a preferred embodiment of the present invention The flowchart. Description of the drawings 100 base plate 102 Alignment film 104 Roller 106 Groove 200 Inspection room 202 $ 4 ΟΛ curtain 204 Steam generator 206 Alignment film test strip 208 Strong light 210 Power supply

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Claims (1)

1220454 _Case No. 92100215_Year Month Date__ VI. Application Patent Scope 1. A method for inspecting an alignment film, comprising: placing an alignment film test piece in a detection chamber; atomizing the alignment film test piece; Strong light illuminates the alignment film test piece; and inspects the surface of the alignment film test piece for abnormal phenomena. 2. The method for inspecting an alignment film as described in item 1 of the scope of patent application, wherein the alignment film test piece has undergone a grinding process. 3. The method for inspecting an alignment film as described in item 1 of the scope of the patent application, wherein the detection chamber blocks external light and airflow interference. 4. The method for inspecting an alignment film according to item 1 of the scope of patent application, wherein the surroundings of the detection chamber are covered with a black screen. 5. The method for inspecting an alignment film as described in item 4 of the scope of patent application, wherein the black curtain is a black cloth curtain material that is opaque, air-permeable and non-reflective. 6. The method for inspecting an alignment film as described in item 1 of the scope of patent application, wherein the method for atomizing the alignment film test piece is to use the steam generated by a steam generator to atomize the alignment film test piece. 7. The method for inspecting an alignment film as described in item 1 of the scope of patent application, wherein the method for irradiating the test piece of the alignment film with strong light is to directly irradiate the test piece of the alignment film with a strong light. 8 · The method for inspecting an alignment film as described in item 1 of the scope of the patent application, wherein the method for inspecting whether there is any abnormality on the sheet of the alignment film test sheet is directly judged by visual inspection. 9 · The method of inspecting the alignment film as described in item 1 of the scope of patent application, 9773twf1.ptc Page 13 1220454 Case No. 92100215 Amendment 6 、 Scope of patent application Where the inspection of the alignment film test sheet table is abnormal, this step includes inspecting the groove length and the groove surface of the alignment film test sheet Check whether the position is abnormal, and check whether there are abnormal patterns on the surface of the alignment film test piece. 10. The method for inspecting an alignment film as described in item 1 of the scope of patent application, wherein if the inspection result of the alignment film test piece is abnormal, adjust the process parameters or perform inspection and maintenance according to the abnormal condition. 1 1. An apparatus for inspecting an alignment film, comprising: a detection chamber; a steam generator disposed in the detection chamber, wherein a test film of an alignment film to be tested is placed on the steam generator; and the 12 Equipment, the outside. There are 13 equipments, 14 equipments around the rack, 15 materials for the curtain, and one glare lamp, which is arranged in the detection room, where the glare lamp is the directing film to be tested. As described in the scope of application of the patent for the inspection of the alignment film set 11th, wherein the detection room is to block external light and air current interference. As described in the scope of the patent application for the inspection of the alignment film set 11 The room is composed of a solid frame, and the solid frame covers a black curtain. The black curtain is a black cloth that is opaque, air-permeable and non-reflective in the setting of the viewing alignment film described in item 13 of the patent application scope. The viewing alignment described in item 11 of the patent application scope The membrane design further includes a power supply for supplying power to the steam generator. 9773twf1.ptc Page 14 1220454 Case No. 92100215 VI. Scope of patent application Vital appliances and the high-intensity lamp _η Revision Ⅰϋϋ Page 15 9773twf1.ptc