TW584709B - Rubbing apparatus real time adjustment system - Google Patents

Abstract

A rubbing apparatus real time adjustment system is introduced. A rubbing roller of the rubbing apparatus is utilized to define the direction of an orientation film of a liquid crystal display (LCD) panel. The real time adjustment system mainly includes a stage moved in a reciprocating manner for carrying the LCD panel, at least one first sensor for measuring the vertical distance between the rubbing roller and the stage, at least one second sensor for detecting if a rubbing cloth of the rubbing roller is peeled off, and a control device for adjusting the position of the rubbing roller to be in parallel with the stage according to the result measured by the first sensor dynamically and for generating a warning signal according to the result detected by the second sensor.

Description

584709 ________ i ^ J21〇7812 ___ year __chrome not__ V. Description of the invention (1) ~~~~ ~ The technical field to which the invention belongs The present invention provides a real-time correction system (rea 1 time adjustment system) ' In particular, an instant calibration system of a rubbing apparatus is used to perform an alignment process of an alignment film in a liquid crystal display, and the instant calibration system of the present invention can be used in the process of performing an alignment process. The non-contact sensor or the touch sensor is used for dynamic detection to avoid the abnormal situation of the orientation machine. In the prior art, in the liquid crystal display (LCD), there are interaction forces such as van der Waals force, inter-dipole bow force, hydrogen bonding and other interaction forces between the alignment film and the liquid crystal molecules through the two orientations of the table. Existence makes the liquid crystal molecules rotate in sequence according to the direction of the fine grooves of the alignment film. Therefore, it can be used to locate the liquid crystal molecules before the electric field is applied, that is, to control the alignment direction of the liquid crystal molecules. Therefore, the alignment film can be described as a control An important element in the quality of liquid crystal displays. Please refer to the circle 1 to FIG. 6. FIGS. 1 to 6 are schematic structural diagrams of the orientation machine 10 that is conventionally used for the alignment process of the alignment film. FIG. The fourth is the relationship between the stamping roller position (Y) and the base travel distance (X) of the orientation machine 10 of FIG. As shown in Figure 1, the conventional orientation machine 10 mainly includes a platform 584709, case number 92107812, month and day amendment _______ _____ ~ a — --------- ~~ · 1 —- 5. Invention Explanation (2) 12, a stage 14 is reciprocally placed on the platform 12 to carry the liquid crystal display panel 16 and the liquid crystal display panel 16 is fixed to the substrate 1 by vacuum suction Surface, a cylindrical wipe roller 18, a roller spindle holder 20 for fixing the wipe roller 18 above the base 14, and a two-contact dial gauge 22, which are used to detect the distance between the two ends of the wipe roller 18 and the base 14 respectively. Among them, the base 14 uses a driving device (not shown in FIG. 1) to drive and control the back and forth movement of the base 14, and the wipe roller 18 uses a stepping motor 2 6 (as shown in FIG. 2). To drive and control its rotation and up-and-down movement, and the orientation machine 10 is an alignment method using mechanical alignment, so that the base 14 can be guided along a linear guide (line machine guide rail, LM guide) rail) 28 Move.

Generally speaking, the 'base 14' is made of metal or ceramic material; the liquid crystal display panel 16 is made of glass, quartz, or plastic material, and has a thickness above about 20 to 100. 〇〇 埃 Alignment film (not shown in Figure 1), the material used to form the alignment film is mainly polyimide (PI) resin, because the lipid has high light transmittance, good liquid crystal alignment and high voltage Retention rate, good heat resistance, resistance to chemical solvents (chemical stability) and radiation, and electrical insulation properties, so PI resin can provide stable display quality of liquid crystal displays; '揍 印 轮 18 is made of aluminum or iron It is made of metal, and the rubbing roller 1 has a rubbing cloth 24 fixed on the surface of the rubbing roller 18, and the rubbing cloth 24 is made of rayon.

584709 Case number—92107812 V. Description of the invention (3) The month is revised to show that the mobile terminal and the horsepower meter are flat and must touch the entire middle school. An :: As shown, first set the surface with an alignment film The liquid panel 1 b female 1 during the alignment process of the orientation film 0i 隹 alignment film: on the base 1 4: 2: 2: 3 0 'At this time, the contact height leaf base 14 will face an arrow two The distance between the two bases i 4] 2 will start the debt measurement wipe roller 3 $ up to 26, the stepping motor 26 five f will return the measured result ^ After the calculation, the wipe roller l8: f * fruit According to the bet, you can also walk on the base ⑷, and then the upper end is lowered to the appropriate second degree.

Brushing this 2 y in the -direction will form a surface of the film with the liquid crystal display panel = J, until the film: the film and the graph, gp — &#; (Shown in Figure 1 and Figure), which is the alignment process of Yuancheng's alignment 骐. The measurement of the axial direction of the machine is based on the two-end process base. However, if the base is fixedly installed, there are only 22 and 10 rubbing rollers at the position. As shown in the figure, since the two sides of the conventional fixed 20 are provided with contact heights, the initial origin (X 0) can be obtained by measuring the amount before the alignment process starts, and between the two ends of the wheel 18 and the base 14 The adjustment started the alignment process (Υ1 and Υ2 in Figure 1), but it was impossible to erase the dynamic data of the distance when the base 14 continued to move. Due to the inaccuracy in the mechanical accuracy, the rubbing distance will not be maintained at a certain value. The machine will measure only 2 2 to the machine 10, and measure it. Therefore, the distance that has not yet been performed, and the time (X1) is printed to learn the beginning. The base of the printing roller 18 is the printing roller 18 of the printing roller 18, which causes the roller to contact the known alignment system. According to this roller I8, the two ends of the line alignment and the two ends of the line are aligned.

584709 _____ Case No. 92107812 _ Month and Day _Ifi______ V. Description of the Invention (4) During the manufacturing process, the amount of push-in at the two ends of the wipe roller 18 will always change, so that the wipe roller 18 may not always be parallel to the base. Block 14, this situation will cause the depth of the fine grooves formed on the surface of the alignment film to be inconsistent, which will affect the display quality of the liquid crystal display. Although in the current calibration operation of the orientation machine, there is a calibration tool, such as a block, to calibrate the relative distance between the wipe roller 18 and the base 14 to correct the initial set value of the plunge amount. The actual alignment process did not help.

In addition, since the alignment cloth 2 4 used to form the fine grooves of the alignment film is only adhered to the surface of the wipe roller 18 with a double-sided patch, when the quality of the alignment cloth 2 4 is poor or a person's operation is not performed, When the situation occurs, during the alignment process, the edges and the center of the alignment cloth 24 will easily fall off, as shown in Figures 5 and 6, and when these dropped parts are brushed over the alignment film When it is on the surface, it will cause poor alignment of the alignment film, which will affect the display quality of the liquid crystal display. If the operator fails to detect this anomaly in real time, it will cause a large amount of loss and thus reduce the product yield. Summary of the Invention

The main object of the present invention is to provide a real-time correction system for a directional machine, which can immediately detect and improve the abnormal phenomenon of the directional machine to avoid the above situation. In the preferred embodiment of the present invention, a directional machine is disclosed.

Page 10 584709 _______ Case No. 92107812__ Year and Month Amendment _ V. Description of the invention (5) Timing correction system, the orientation machine uses a rubbing roller to define the alignment on a liquid crystal display panel Directivity of the membrane (orientatiOnfi 1 m). The real-time calibration system mainly includes a reciprocable base (st age) for carrying the liquid crystal display panel, at least-a first sensor (sens 〇r) for measuring the vertical distance between the, Whether the alignment cloth of at least one second sensing wheel is detached, and a result measured by a sensor is adjusted in real time so that the wipe roller remains parallel to the measured result of the base device to generate an abnormal message The invention's real-time detection sensor of a directional machine dynamically detects the accuracy of the rubbing roller, and can automatically return the measurement result to adjust the pressing degree control of the two ends of the rubbing roller. In addition, when the second sensor on the outer side of the printing roller is used to detect whether the alignment cloth on the surface of the wheel has fallen off, the instant detection system can immediately issue an abnormality. For implementation, please refer to FIG. 7 to FIG. 9. FIG. 7 is a structural schematic diagram of the time correction system 40. The wipe roller and the base device are used to detect the wipe roller device. A height of the rubbing roller is enabled, and can be based on the second sensing number. The positive system mainly uses the stepping horse volume setting of the parallel feed between the first wheel and the base to the orientation machine to achieve a process stable positive system and can be generated by the at-time detection and the wipe roller. When the alignment cloth comes off, a signal is notified to avoid the orientation machine of the present invention, which is the orientation machine shown in Fig. 7.

Page 11 584709 Case No. 92107812 said Amendment V. Explanation of the invention (6) (γ) and the travel distance 基座 of the base, Fig. 9 ^ Schematic diagram of the 40 printing roller 48 and each sensor 56, μ. In the preferred embodiment of the present invention, the positioning process is performed in the alignment process, in order to define the directivity of the LCD panel and the real-time calibration system of the orientation machine. During the alignment process, does the orientation machine have different hanging conditions and achieve the effect of stabilizing the orientation machine. As shown in FIG. 7, the instant calibration system 40 of the orientation machine of the present invention mainly includes a platform 42, and a base 44 is mounted on the platform 42 in a reciprocating manner to carry a liquid crystal display panel. 46. The liquid crystal display panel 46 is fixed to the surface of the base 44 by vacuum suction. An wipe roller 48 'is attached to the surface of the wipe roller 48, and a roller shaft fixing device 50' is used to fix the roller. The wipe roller 48 is fixed above the base 44 and the two-contact altimeter 52 is used to detect the distance between the two ends of the wipe roller 48 and the base 44 respectively. Among them, the base 44 uses a driving device (not shown in FIG. 7) to drive and control the back and forth movement of the base 44, and the wipe roller 48 uses a control device such as a stepping motor (not shown in FIG. 7). No. 7) to drive and control its rotation and up and down movement, and the orientation machine uses a mechanical alignment alignment method, so that the base 44 can move along the linear guide trajectory 62. In addition, the instant calibration system 40 of the directional machine of the present invention further includes two non-contact sensors (sens 0r) 56, such as a laser diode and a light emitting diode (light). emitting diode,

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584709 ~ ___ Case No. 92107812__Year Month and Revise ____ V. Description of the Invention (7) LED), or image processing sensor, are set on the two ends of the wipe roller 48 respectively, which can be used to measure the alignment process During the process, the distance between the two ends of the wipe roller 48 and the base 44 can be adjusted according to the measured results in real time, so that the wipe roller 48 is aligned. Keep parallel to the base 4 4 during the manufacturing process. In the preferred embodiment of the present invention, the non-contact sensor 56 is fixed on the roller shaft fixing device 50, and is used to measure both ends of the shaft center of the wipe roller 48 and the base 44. The vertical distance between them is because the axis of the wiper roller 48 is less than 2 microns (measured by vibration measurement) when the wiper roller 48 rotates, so it does not affect the accuracy of the measurement results. The invention is not limited to this. The non-contact sensor 56 of the present invention can be any type of sensor and can be set at any distance between the two ends of the wipe roller 4 8 and the base 4 4 that can be measured. The position is, for example, a magnetic sensor provided on the base 44. Furthermore, the instant calibration system 4 of the orientation machine of the present invention also includes a non-contact optical sensor 5 8 arranged in parallel with the $ side of the wipe roller 4 8, which can be used to detect sticking to the wipe. Whether the alignment cloth 5 4 of the roller 4 8 is detached. In the preferred embodiment of the present invention, the non-hammer-type optical sensor 58 can be any sensor capable of detecting, such as a photoelectric obstacle detector. When the photoelectric P The light emitted by the early obstruction sensor is blocked by the falling part of the alignment cloth 54. The instant correction system 40 of the directional machine of the present invention will generate an abnormal signal to warn the operator to immediately Stop the operation of the orientation machine 'to avoid the occurrence of major abnormalities. And the directional machine of the present invention

Page 13 584709 ----- Μ% 92107812_ year month day correction —____ V. Description of the invention (8)

The real-time correction system 40 may further include a contact line sensor 60 provided on the outside of the wiper roller 48. When the alignment cloth 54 is detached, the detached portion of the alignment cloth 54 will directly touch and touch To the contact line sensor 6 〇 and cause mechanical action 'to avoid when the rotation speed of the wipe roller 4 8 is too fast, because the operating timing of the non-contact optical sensor 5 8 is short, resulting in the immediate orientation of the machine The calibration system 40 cannot detect abnormal signals in real time (due to the time difference). In addition, as shown in FIG. 9, when the alignment cloth 54 of the wipe roller 48 is detached, when the wipe roller 48 continues to rotate, the detached portion of the alignment cloth 54 will follow the wipe roller 4 8 The tangential direction of the lens moves in parallel. Therefore, the non-contact optical sensor 58 of the present invention needs to be disposed on the outer side of the wipe roller 48 to facilitate the detection of the falling off of the alignment cloth 54.

Please refer to FIGS. 7 and 8 again. Before the alignment process is performed, a liquid crystal display panel 46 with an alignment film (not shown in FIGS. 7 and 8) on the surface is placed on the base of the orientation machine 40. On the seat 4 4 and then start the alignment process of the alignment film, the base 44 will move along the linear guide trajectory 62 'At this time, the contact altimeter 5 2 will detect the two ends of the wipe roller 4 8 and the base The distance between 44 (that is, χ〇), the measured result is transmitted to the stepping motor that controls the wipe roller 4 8, and the stepping motor is then calculated based on the set value of the plunge amount according to the measurement result Then, the two ends of the wipe roller 4 8 are lowered to appropriate heights (ie, the values of Y1 and Y 2 at XI), and then the wipe roller 4 8 starts to rotate and brushes the surface of the alignment film in a certain direction. It is worth noting that during the alignment process, the non-contact sensor 56 will continuously detect and transmit the measurement results to a feedback circuit (not shown in Figure 7 and Figure 7). Eight

Page 14 584709 Case No. 92107812 (Revision V. Description of Invention (9)) to perform a signal processing, and then the feedback circuit will generate a feedback signal and send it to the stepper motor to adjust the wipe roller 48 two in real time The height of the end is shown in Fig. 8, that is, the pressing amount of the rubbing roller 48 until the entire surface of the alignment film forms a thin parallel groove (not shown in Figs. 7 and 8), which is completed. The alignment process of the alignment film. Compared with the conventional timing correction system, large abnormalities can occur immediately. Its main site detects the movement of the wipe rollers 4 8 and the seat 4 4 and will measure the stepping motor to adjust the distance at any time, that is, the status of the wipe roller alignment process' to improve the process's coming, after statistics The basis for regular calibration with the finishing table. The positive system 40 and the use of the sensor 58 or the contact-type linear sensor cloth 5 4 are detached, so that the time-correction system 40 can immediately lose. The present invention feeds the non-contact plane of the machine to the wheel 48 of the wheel 48 and the wheel 48 of the best invention can detect the outer side of the machine 48 to detect the 5 4 shedding constant signal to the machine. The result of the seat 44 is to synchronize the two ends of the printing roller 4 8 to stabilize the printing roller stability. Then, in addition, the printing roller measuring device 60 is used to produce a different orientation machine when the cloth is aligned. Line accuracy, the two ends of the orientation machine and the base volume are set, the base 4 4 guarantees this measured knot value as a non-contact wipe roller of the orientation machine, the orientation notification, avoiding the platform has to avoid the weight 5 6 dynamic And as the seats 4 4 on both sides of the abutment make the orientation machine's instant inspection optical sense 4 8 alignment machine under the record of parallel fruiting, the large-scale production of the above-mentioned invention of the invention is avoided. The real-time inspection of the orientation machine can not only adjust the wipe at any time during the alignment process:

Page 15 584709 ____Case No.92107812_ ± _ Month Revision ____ V. Description of the invention (10) to keep parallel to the base to avoid the phenomenon of inconsistent fine groove depth of the alignment film caused by mechanical errors In addition, the significant loss caused by the falling of the alignment cloth can not be detected immediately. Therefore, the instant calibration system of the orientation machine of the present invention has the advantages of stable alignment process, avoiding waste of raw materials, and improving product yield. The above description is only a preferred embodiment of the present invention, and any equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Page 16 584709 _______ Case No. 92107812_Year Month Day_Amendment Brief Description of the Drawings Brief Description of the Drawings Figure 1 is a schematic diagram of the structure of a conventional orientation machine. Figures 2 and 3 are side views of the orientation machine of Figure 1. Fig. 4 is a relationship diagram between the position of the rubbing roller (Y) and the travel distance (X) of the base of the orientation machine of Fig. 1. Figures 5 and 6 are schematic structural diagrams of conventional orientation machines. FIG. 7 is a schematic structural view of a real-time correction system of a directional machine according to the present invention. Fig. 8 is a relationship diagram between the rubbing roller position (Y) and the travel distance (X) of the base of the orientation machine of Fig. 7. Fig. 9 is a schematic diagram of the relative positions of the rubbing roller and each sensor of the orientation machine of Fig. 7. Explanation of Symbols in Drawings 04826002 11122344 Orientation table 12 Platform base 16 LCD panel rubbing roller * 1 ™ 20 Roller axis fixed contact altimeter 24 Alignment cloth stepping motor 28 Linear guide track arrow direction Orientation table Instant Calibration System Platform 44 Base

Page 17 584709 __Case No. 92107812_ Year, month, and day correction diagram brief description 46 LCD panel 48 Wipe roller 50 Roller axis fixing device 52 Contact altimeter 54 S direction cloth 56 Non-contact sensor 58 Non Contact optical sensor 60 Contact line sensor 62 Linear guidance

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Claims (1)

584709 ______SS_92107812_Year 6th, patent application scope ^ --- 1 · An instant calibration system for an orientation machine, the orientation machine uses a rubbing roller to define a liquid crystal display and two panels (liquid Orientation film orientation on a crystal display (LCD), this instant correction ▲ • The display system includes a stage that can be moved back and forth to carry the liquid crystal display Panel, at least one first sensor (sensor), for measuring the vertical distance between the base and the base; and a control device, which can be adjusted in real time according to the result measured by the first sensor The height of the wipe roller keeps the wipe roller flat to the base. "* 2. If the instant correction system of item 1 of the scope of patent application, the orientation machine also includes a holder for fixing the wiper roller above the base. 3 · If applying The real-time correction system of item 2 of the patent, wherein the first sensor is arranged outside the erasing roller and fixed on the fixing device. 4 · The instant-correction system of item 3 of the patent application , Wherein the first sensor system includes a laser diode, a light emitting diode (1 i gh t em i 11 i ng di 〇de, LED), or an image processing sensor Page 19 584709 _______ Case No. 92107812 _ Month and month Amendment ________ Sixth, the scope of patent application. 5. If the instant correction system of item 1 of the patent application scope, wherein the control device further includes a feedback circuit and a step motor (stepm 〇t 〇r), the feedback circuit is used to receive the first The signal output from the sensor is subjected to a signal processing, and a feedback signal is generated and transmitted to the stepping motor to adjust the height of the erasing roller in real time. 6. The instant correction system according to item 1 of the patent application scope, wherein the first sensor is disposed on the base. 7. If the instant correction system of item 6 of the patent application scope, wherein the first sensor is a magnetic displacement gauge. 8. If the instant correction system of item 1 of the patent application scope, wherein the orientation machine further comprises an alignment cloth adhered to the surface of the wipe roller. 9. If the instant calibration system of item 8 of the patent application scope, the instant calibration system further includes a second sensor, which is arranged parallel to the outside of the wipe roller to detect whether the alignment cloth has fallen off. 10. The instant correction system according to item 9 of the scope of patent application, wherein the second sensor is a photoelectric obstacle detector (ph 〇t 〇e 1 ectric obstacle detector). Tester Page 20 584709 Case No. 92107812_Year Month Day Amendment VI. When the light in the patent application range is interrupted by the falling part of the alignment cloth, the instant correction system will generate an abnormal signal. The instant calibration system of item 9, wherein the second sensor is a rod sensor, and when the falling part of the alignment cloth touches the line sensor, the instant calibration system will An abnormal signal is generated. 12. A real-time calibration system of an orientation machine 'The orientation machine uses a rubbing ro [1 er] with an alignment cloth attached to its surface to define a liquid crystal display panel Orientation film (or] l entat] [on f i1m) on (liquid crystal di sp 1 < ay, LCD), including: a reciprocable stage for carrying The liquid crystal display panel j has at least one first sensor disposed parallel to the outside of the wipe roller. Used to detect whether the alignment cloth adhered to the surface of the wipe roller has fallen off; a feedback circuit; and a control device for controlling the operation of the orientation machine; wherein when the first sensor When it is detected that the alignment cloth has fallen off, the first sensor will generate a signal and send it to the feedback circuit 5. After that, the feedback circuit will generate an abnormal signal and send it to the control device. 13. Patent if requested Real-time correction system 5 of scope item 12 Page 21 584709 — ----- 92107812__Yuanyue jL 一一 -____ Sixth, the scope of patent application The machine also includes a holder for fixing the wipe roller to the base Above. · 1 4 · If the instant correction system of item 13 of the patent application scope, wherein the first sensor is arranged on the fixed device. 15 · The instant correction system according to item 14 of the scope of patent application, wherein the first sensor is a photoelectric obstacle detector. When the photoelectric obstacle sensor sends out When the light is interrupted by the falling part of the alignment cloth, the feedback circuit will generate the abnormal signal. 16. According to the instant correction system of item 14 in the scope of patent application, wherein the first sensor is a rod sensor, when the i-dropped part of the alignment cloth touches the line sensor Device, the feedback circuit will generate the abnormal signal. 17 The instant correction system according to item 14 of the scope of patent application, wherein the selective correction system further includes at least a second sensor ’for measuring the wipe. The vertical distance between the wheel and the base 'and transmits the measured result to the feedback circuit for signal processing, after which the feedback circuit generates two feedback signals and transmits them to the control device, so that the The control device f adjusts the height of the wipe roller ^ 2 β in real time according to the result measured by the second sensor, so that the wipe roller remains parallel to the base. Round two fine v 584709 _________________Case No.92107812 _____ Year 6. Application for patent scope 1 8. If the patent application scope No. 17 of the instant correction second sensor is set on the outside of the wipe roller, the device, and the second The sensor system includes a light diode and a light emitting image processing sensor element. 19. If the real-time correction two sensors of item 17 in the patent application are set on the base, And the second-position displacement meter. 2 0. If the instant application and correction system of the patent application item 1.2 is a step motor, a correction system, wherein the first and second fixed position are fixed to the fixed shooting second. Polar body (laser diode, LED), or system, wherein the first sensor is a magnetic system, where the control