TWI500519B - Screen printing fixture having supporting surface in form of arc surface - Google Patents

Description

Screen printing fixture with curved surface bearing surface

The present invention relates to a screen printing jig; in particular, the present invention relates to a screen printing jig for carrying a display module.

1A is a side cross-sectional view of a conventional screen printing fixture for screen printing of a load bearing display panel. As shown in FIG. 1A, the conventional screen printing jig 10 includes an outer jig 12 and an inner jig 14. The inner fixture 14 has a bearing surface 16 for the display module 20 and the display module 20 is attracted by the vacuum nozzle 18. Since the bearing surface 16 of the conventional screen printing fixture 10 is a flat surface, when the display module 20 having the curved shape is placed, there are gaps 22 on both sides of the inner fixture 14 and between the bearing surface 16 and the display module 20. . Therefore, when the screen printing is performed, when the blade 40 is pressed against one side of the screen 30, the display module 20 is shaken. On the other hand, the gaps 22 on both sides also cause the suction force of the vacuum nozzle 18 to the display module 20 to be insufficient, which may cause the display module 20 to slide easily during the processing.

In addition to the above two problems, the gap 22 between the two sides of the inner fixture 14 and the display module 20 also affects the program's misjudgment of the edge position of the display module 20. FIG. 1B is a top view of a conventional screen printing jig 10. The position of the gap substantially corresponds to the edge 20a of the display module 20. When the image capturing device (not shown) captures the display module 20 in the conventional screen printing fixture 10 from above, the display module is caused by the presence of the gap. The edge 20a of the image 20 has a different brightness than the center thereof, so that the image taken by the image capturing device on the edge 20a of the display module 20 is different from the display. The difference in gray level at the center of the module 20. Therefore, when the program determines the size of the display module 20 according to the captured image, since there is a gray-scale blur band between the edge 20a of the display module 20 and the inner edge 14a of the inner jig 14, the program cannot be found. The edge 20a of the group 20 or the case where the size of the display module 20 is misjudged as the inner edge 14a. In addition, there is no significant difference in the surface of the conventional screen printing fixture 10 between the outer fixture 12 and the inner fixture 14. Therefore, the program needs to spend more time to confirm the position of the edge when judging the size of the display module 20.

One of the objects of the present invention is to provide a screen printing jig, which can increase the stability of the jig carrying display module.

Another object of the present invention is to provide a screen printing jig that enhances the efficiency of the program in determining the outline of the display module.

The screen printing fixture is used for carrying the display module for screen printing, including the outer fixture and the inner fixture. The outer fixture is enclosed in a receiving space, and the inner fixture is disposed in the accommodating space, and the edge is connected with the outer fixture. The inner fixture has a bearing surface, and the bearing surface is formed as a curved surface. The screen printing fixture of the invention can increase the stability of the fixture carrying display module and improve the efficiency of the program to judge the contour of the display module, thereby improving the efficiency and printing quality of the screen printing operation.

100‧‧‧ Screen printing fixture

110‧‧‧vacuum attraction path

102‧‧‧External fixture

112‧‧‧ outer surface

104‧‧‧ internal fixture

114‧‧‧Ring platform

104a‧‧‧ inner edge

116‧‧‧Image identification ring

106‧‧‧ accommodating space

200‧‧‧ display module

108‧‧‧ bearing surface

1A is a side cross-sectional view of a conventional screen printing jig.

Figure 1B is a top view of a conventional screen printing fixture.

2A and 2B are side cross-sectional views of a screen printing jig of the present invention.

3 is a side cross-sectional view showing another embodiment of the screen printing jig of the present invention.

Figure 4 is a top plan view of the screen printing fixture of Figure 2B.

5A and 5B are top views of different embodiments of the screen printing jig of the present invention.

Figure 6 is a side cross-sectional view showing another embodiment of the screen printing jig of the present invention.

The screen printing jig of the present invention is preferably used for screen printing operations of display modules. The display module preferably includes a liquid crystal display module, a light emitting diode display module, an electrophoretic display module or other different types of display modules. Moreover, in a preferred embodiment, the display module has an arcuate display surface.

2A and 2B are side cross-sectional views of the screen printing jig 100 of the present invention. As shown in FIG. 2A, the screen printing jig 100 is used for screen printing by the bearing display module 200. The screen printing jig 100 includes an outer jig 102 and an inner jig 104. The outer jig 102 encloses a hollow rectangular accommodating space 106, and the inner jig 104 is disposed in the accommodating space 106, and the edge thereof is in contact with the outer jig 102. The shape of the accommodating space 106 can be adjusted according to the shape of the inner fixture 104, and can also be a groove rather than a hollow form. The inner fixture 104 has a bearing surface 108 and the bearing surface 108 is formed as a concave curved surface. However, in different embodiments, if the display module to be carried has a concave surface, the bearing surface 108 can also be matched with a convex curved surface. The inner fixture 104 includes a plurality of vacuum suction paths 110, and the vacuum suction paths 110 form openings on the bearing surface 108, respectively. As shown in FIG. 2B , after the display module 200 is placed on the bearing surface 108 , the surface thereof is attached to the bearing surface 108 , that is, the bearing surface 108 preferably has the same or similar curvature as the display module 200 . When the display module 200 is placed on the carrying surface 108, each of the vacuum suction paths 110 can surely adsorb the display module 200 to reduce the air leakage condition. In this way, when the subsequent screen printing operation is performed, the display module 200 does not cause shaking or displacement, and thus the printing accuracy can be improved.

In this embodiment, the vacuum suction path 110 is averaged along the bearing surface 108. Column, but not limited to this. As shown in FIG. 3, in other embodiments, the vacuum suction path 110 can adjust the distribution of the vacuum suction path 110 according to the form of the machine or the size of the display module 200. For example, the opening of the vacuum suction path 110 is closer to the edge of the bearing surface 108 than the distribution density of the center of the bearing surface 108 to provide a larger adsorption force at the center of the display module 200. Or conversely, there is a larger vacuum attraction path 110 opening distribution density near the edge of the bearing surface 108 to increase the adsorption force at the edge.

In addition, the bearing surface 108 of the inner fixture 104 is preferably a metallic reflective surface. The metal reflective surface can be formed by polishing a metal surface, formed of a metal plating film, or the like. When the image capturing device (not shown) is photographed from above the screen printing jig 100, the metal reflective surface can increase the brightness of the reflected light of the light source to improve the contrast of the captured image. Please refer to FIG. 4. FIG. 4 is a top view of the screen printing fixture of FIG. 2B. As described above, since the display module 200 is attached to the bearing surface 108, the image captured by the image capturing device is not caused by the gap between the inner edge 104a of the inner fixture 104 and the display module 200. Order fuzzy band. In addition, the metal reflective surface increases the brightness of the light source, and the range of the bearing surface 108 preferably protrudes beyond the edge of the display module 200 (that is, the edge of the display module 200 is completely included in the bearing surface 108). The outline of the module 200 becomes clearer in the case where the brightness is increased, so that the program can clearly recognize the outline of the display module 200 without erroneously determining the size of the display module 200.

In addition, the outer fixture 102 has an outer surface 112 that is co-directional with the bearing surface 108, and the bearing surface 108 has a higher light reflectivity than the outer surface 112. For example, the outer surface 112 is coated with a light absorbing material (as indicated by the slanted lines in FIG. 4) to reduce the light reflectivity of the outer surface 112 to further increase the degree of difference in reflectance between the outer surface 112 and the load bearing surface 108. Therefore, when the program judges the size of the display module 200, since the outer surface 112 of the outer jig 102 and the bearing surface 108 of the inner jig 104 reflect light, a significant contrast effect is formed. With this design, on the one hand, the possibility of gray-scale blurring can be reduced by obvious contrast, and on the other hand, the program can be avoided every time. The edge position of the display module 200 is confirmed from the outermost edge of the outer jig 102, thereby greatly eliminating the time taken for the conventional program to search and judge the size of the display module 200.

It should be noted that the inner fixture 104 has a metal reflective surface in addition to the bearing surface 108 on which the display module 200 is placed, and the annular platform 114 and the image recognition loop 116 extending from the bearing surface 108 to the outside adopt a metal reflective surface. In detail, the image recognition loop 116 refers to the peripheral edge of the bearing surface 108, that is, the range between the dotted frame in FIG. 4 and the inner edge 104a of the inner fixture 104. The edge of the display module 200 preferably falls into this range. The annular platform 114 refers to the outer periphery of the bearing surface 108 extending outwardly between the bearing surface 108 and the outer surface 112, that is, the junction between the inner fixture 104 and the outer fixture 102; the surface of the annular platform 114 is preferably It is planar and preferably parallel to the surface of the outer fixture. As shown in the upper view of the screen printing jig 100 of FIG. 5A, the inner fixture 104 can also use a metal reflective surface only in the image recognition loop 114, thereby improving the brightness of the light source at the edge of the bearing surface, making the program easier to The captured image identifies the size of the display module 200. As shown in the upper view of the screen printing jig 100 of FIG. 5B, the inner fixture 104 further adopts a metal reflective surface at the annular platform 114, because the surface of the annular platform 114 is preferably parallel to the surface of the outer fixture surface. This can further highlight the difference between the outer surface 112 and the annular platform 114 to assist in improving the efficiency of the program determination. Further, as shown in FIG. 6, the bearing surface 108 of the inner fixture 104 is not limited to the aforementioned curved metal reflective surface. The bearing surface 108 can also adjust the shape of the metal reflective surface to increase the brightness of the light reflection.

The present invention has been described by the above-described related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equivalents of the spirit and scope of the invention are included in the scope of the invention.

100‧‧‧ Screen printing fixture

102‧‧‧External fixture

104‧‧‧ internal fixture

106‧‧‧ accommodating space

108‧‧‧ bearing surface

110‧‧‧vacuum attraction path

112‧‧‧ outer surface

200‧‧‧ display module

Claims (16)

A screen printing fixture for carrying a display module for screen printing, comprising: an outer fixture, enclosing an accommodation space; and an inner fixture disposed in the accommodation space, and the edge and the outer The jig is connected; wherein the inner jig has a bearing surface, the bearing surface is a metal reflective surface and is formed into a curved surface. The screen printing jig according to claim 1, wherein the inner jig includes a plurality of vacuum suction paths, and the vacuum suction paths respectively form openings on the bearing surface. The screen printing jig according to claim 2, wherein the distribution of the openings closer to the edge of the bearing surface is smaller than the distribution density near the center of the bearing surface. The screen printing jig according to claim 1, wherein the metal reflective surface is formed by a polished metal surface. The screen printing jig according to claim 1, wherein the metal reflective surface is formed of a metal plating film. The screen printing jig according to claim 1, wherein the outer jig has an outer surface in the same direction as the bearing surface, and the bearing surface has a higher light reflectivity than the outer surface. The screen printing fixture of claim 6, wherein the inner fixture extends around the periphery of the bearing surface to form an annular platform between the bearing surface and the outer surface, and the surface of the annular platform is also a metal reflective surface. . The screen printing fixture of claim 1, wherein an edge of the bearing surface forms an image recognition loop, and the surface of the image recognition loop is a metal reflective surface. A screen printing fixture for carrying a display module for screen printing, comprising: an outer fixture, enclosing an accommodation space; and an inner fixture disposed in the accommodation space, and the edge and the outer The jig is connected; wherein the inner jig has a bearing surface, and the bearing surface is formed as a metal reflective surface. The screen printing jig according to claim 9, wherein the metal reflective surface is formed by a polished metal surface. The screen printing jig according to claim 9, wherein the metal reflective surface is formed of a metal plating film. The screen printing jig according to claim 9, wherein the outer surface of the outer jig and the bearing surface are formed as a light absorbing surface. The screen printing fixture of claim 12, wherein the inner fixture extends around the periphery of the bearing surface to form an annular platform between the bearing surface and the outer surface, and the surface of the annular platform is also a metal reflective surface. . The screen printing jig according to claim 9, wherein the bearing surface is formed in a curved surface. The screen printing jig according to claim 14, wherein the inner jig includes a plurality of vacuum suction paths, and the vacuum suction paths respectively form openings on the bearing surface. The screen printing jig according to claim 15, wherein the distribution of the openings closer to the edge of the bearing surface is smaller than the distribution density near the center of the bearing surface.