JP2006184465A - Method of manufacturing display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a sufficient conduction by sufficiently securing a conductive connection area between display electrodes provided on one substrate and electrode terminals provided on another substrate. <P>SOLUTION: The material of an oriented film 13 provided on a first display electrode 8a of a first transparent substrate 2a and on a second display electrode 8b of a second transparent substrate 2b is so formed as to have a notched part 14. The notched part 14 is notched in such a direction that, between a sticking material 5 and a display area 17, the part opposed to a transfer section 11 is away from the transfer section 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a display panel, and more particularly to a method for manufacturing a display panel in which display electrodes provided on one substrate are conductively connected to electrode terminals provided on the other substrate via a transfer portion.

  2. Description of the Related Art Conventionally, a liquid crystal display panel for displaying an image such as a character by driving a liquid crystal sealed in a gap between a pair of substrates has been widely used as a display means for a computer, a mobile phone, or the like.

  FIG. 5 is a schematic cross-sectional view showing an example of a conventional liquid crystal display panel. As shown in FIG. 5, the conventional liquid crystal display panel 21 has a pair of transparent substrates 22. Compared with one transparent substrate 22a, the other transparent substrate 22b is formed larger in a planar shape, and this large formed portion is a terminal portion 23.

  The two transparent substrates 22 are integrally formed by a sealing material 25 provided on the peripheral edges of the inner surfaces of the two transparent substrates 22 facing each other. Inside the two transparent substrates 22 and the sealing material 25, there is a liquid crystal 26. And a spacer is enclosed.

  A first display electrode 27 is provided on the inner surface of one transparent substrate 22a, and a first electrode terminal 28 corresponding to the first display electrode 27 is provided on the terminal portion 23 of the other transparent substrate 22b. Yes. The end portion of the first display electrode 27 and the end portion of the first electrode terminal 28 are arranged to face each other in the transfer portion 30 of the sealing material 25, and the plurality of conductive particles 31 contained in the sealing material 25 are interposed therebetween. Are electrically connected.

  A second display electrode is provided on the inner surface of the other transparent substrate 22b, and the second display electrode extends to the terminal portion 23 to serve as a second electrode terminal.

  An alignment film 33 is provided on the inner surfaces of the transparent substrates 22 surrounded by the position where the sealing material 25 is disposed, and is stacked on the first display electrode 27 and the second display electrode. In order to make the gap uniform inside the liquid crystal display panel 21, the liquid crystal display panel 21 is provided so as to be close to the inner edge of the sealing material 25 and to be spread over the entire inner side surrounded by the arrangement position of the sealing material 25.

  In such a liquid crystal display panel 21, a voltage is applied from the first electrode terminal 28 to the first display electrode 27 via the transfer unit 30, and a voltage is applied to the second display electrode via the second electrode terminal. By driving the liquid crystal 26, a desired image is displayed.

  However, the liquid crystal display panel 21 has a good wettability with respect to the alignment film material on the display electrode 27 when the alignment film material is printed and formed on the display electrode 27 in the manufacturing process. In addition, the alignment film material spreads on the display electrode 27.

  Here, if the alignment film material wets and spreads to a position corresponding to the transfer portion 30 in the first display electrode 27, the conductive connection area between the first display electrode 27 and the first electrode terminal 28 becomes narrow. As a result, in the liquid crystal display panel 21, there is a problem that sufficient conduction cannot be achieved between the first display electrode 27 and the first electrode terminal 28, and a conductive connection failure may occur. Was.

Japanese Patent Laid-Open No. 2004-4979

  The present invention has been made in view of these points, and by sufficiently securing a conductive connection area between a display electrode provided on one substrate and an electrode terminal provided on the other substrate, sufficient conduction is achieved. It is an object of the present invention to provide a display panel manufacturing method capable of achieving the above.

  In order to achieve the above object, a display panel manufacturing method according to the present invention is characterized in that a first display electrode and a second display electrode are provided on the mutually opposing inner surfaces of a first substrate and a second substrate, respectively. An electrode terminal that is conductively connected to the first display electrode provided on the first substrate is provided on the second substrate, and an inner display surrounded by an arrangement position of the peripheral sealing material on the inner surfaces of the two substrates. In the region, a thin film is provided on both display electrodes, the sealing material contains a conductive material, and the display panel performs conductive connection between the first display electrode and the electrode terminal in the transfer portion of the sealing material. In the manufacturing method, the thin film material of the thin film provided on the first substrate has a shape having a notch, and the notch is opposed to the transfer part between the seal material and the display region. The part to do is There is the point that has been cut in a direction away from the attempt to transfer part.

  The thin film may be an alignment film that aligns liquid crystal sealed in the interior surrounded by the substrates and the sealing material in a predetermined direction.

  According to this invention, when the alignment film material is printed on the display electrode, the portion of the alignment film material that faces the transfer portion is formed in a shape that is cut away in a direction away from the transfer portion. For this reason, even when the alignment film material has spread and spread on the display electrode, the alignment film material can be prevented from spreading to the position corresponding to the transfer portion on the display electrode, It is possible to prevent the conductive connection area between the display electrode and the electrode terminal from becoming narrow in the transfer portion.

  In addition, when the alignment film material is provided, the alignment film material is overlapped at the position corresponding to the transfer part in the display electrode or the electrode terminal even if the alignment film material is displaced on the transfer part side. Can be prevented.

  Therefore, according to the method for manufacturing a display panel according to the present invention, a sufficient conductive connection area between the display electrode and the electrode terminal can be secured, thereby preventing a poor conductive connection between the display electrode and the electrode terminal. Sufficient conduction can be achieved.

  Hereinafter, an embodiment of a display panel according to the present invention will be described with reference to FIGS. Here, in this embodiment, a liquid crystal display panel that displays a desired image by driving liquid crystal sealed in a gap between a pair of substrates will be described as a display panel.

  FIG. 1A is a schematic plan view showing a first transparent substrate constituting the liquid crystal display panel according to this embodiment, and FIG. 1B is a second transparent constituting the liquid crystal display panel according to this embodiment. FIG. 2 is a schematic plan view showing a liquid crystal display panel composed of FIGS. 1 (a) and 1 (b).

  As shown in FIGS. 1A, 1 </ b> B, and 2, the liquid crystal display panel 1 according to the present embodiment has a pair of transparent substrates 2, and the first transparent substrate 2 a out of the both transparent substrates 2. Compared with the second transparent substrate 2b, the second transparent substrate 2b is formed to be larger in a planar shape, and the large formed portion serves as a terminal portion 3.

  A sealing material 5 is provided on the outer peripheral edges of the inner surfaces of the two transparent substrates 2 facing each other, and the two transparent substrates 2 are integrally formed by the sealing material 5. The sealing material 5 contains a plurality of conductive particles 6.

  A plurality of display electrodes 8 made of ITO (Indium Tin Oxide) or the like are provided on the inner surfaces of the two transparent substrates 2 facing each other and displaying on the liquid crystal display panel 1. The plurality of first display electrodes 8a provided on the first transparent substrate 2a among the respective display electrodes 8 have both ends reaching the edge of the first transparent substrate 2a via the arrangement positions of the sealing material 5, respectively. It is formed as follows.

  The terminal portion 3 of the second transparent substrate 2b is provided with a plurality of first electrode terminals 9a corresponding to the first display electrodes 8a independently of the display electrodes 8, and the first electrode terminals 9a One end portion is provided at a position facing each first display electrode 8 a at the position where the sealing material 5 is disposed. In the present embodiment, the first display electrodes 8a and the first electrode terminals 9a are disposed so as to face each other at the central portion at one side of the position where the sealing material 5 is disposed. A position where each first display electrode 8 a and each first electrode terminal 9 a face each other is a transfer portion 11.

  The first display electrode 8 a and the first electrode terminal 9 a are conductively connected via the plurality of conductive particles 6 in the transfer portion 11 of the seal material 5.

  One end portion of the second display electrode 8b provided on the second transparent substrate 2b in the display electrode 8 is routed in the non-display area and extended to the terminal portion 3 to serve as the second electrode terminal 9b.

  An alignment film 13 is laminated on the display electrode 8 as a thin film on the inner surface surrounded by the arrangement position of the sealing material 5 on the inner surfaces of both transparent substrates 2.

  These alignment films 13 are formed in a shape having a notch portion 14, and the notch portion 14 is spaced from the transfer portion 11 at a portion corresponding to the transfer portion 11 between the seal material 5 and the display region 17. Notched in the direction.

  A liquid crystal 15 and a spacer are enclosed inside the transparent substrate 2 and the sealing material 5.

  Next, a method for manufacturing the liquid crystal display panel 1 will be described.

  First, the first display electrode 8a is formed on the inner surface of the first transparent substrate 2a, the second display electrode 8b is formed on the inner surface of the second transparent substrate 2b, and the terminal portion 3 extends to the second display electrode 8b. The second electrode terminal 9b and the first electrode terminal 9a independent of the second display electrode 8b and the second electrode terminal 9b are formed.

  Subsequently, the alignment film material is printed on the inner side surrounded by the arrangement position of the sealing material 5. Here, in the present embodiment, the alignment film material is cut out in a direction in which a portion facing the transfer portion 11 disposed in the central portion on one side of the sealing material 5 is separated from the transfer portion 11 outside the display region 17. The notch part 14 is formed, and the planar shape of the entire alignment film 13 is formed to be a concave shape. Then, the alignment film 13 is formed by rubbing the alignment film material.

  The printed shape of the alignment film 13 is not limited to the present embodiment. For example, in this embodiment, the alignment film material has a shape having a notch portion 14 in which the entire position facing the transfer portion 11 is linearly cut. However, as shown in FIG. You may form in the comb-tooth shape which has the notch part 14 notched in the direction away from the transfer part 11 only on the 1st display electrode 8a. Further, the arrangement position of the transfer part 11 is not limited to this embodiment, and as shown in FIGS. 4A and 4B, the transfer part 11 is provided at both ends of one side of the sealing material 5. It may be arranged. In this case, the alignment film material is printed so that the planar shape becomes a convex shape.

  Further, the sealing material 5 including a plurality of conductive particles 6 is applied to the inner surface of the first transparent substrate 2a at the arrangement position of the sealing material 5 while forming the liquid crystal injection port, and the inner surface of the second transparent substrate 2b. A spacer is sprayed on the two substrates, and the two transparent substrates 2 are bonded together to form a single body. As a result, the first display electrode 8 a and the first electrode terminal 9 a are brought into conduction through the conductive particles 6 in the transfer portion 11.

  Next, after injecting the liquid crystal 15 into the inside surrounded by both the transparent substrate 2 and the sealing material 5 from the injection port, the injection port is sealed, and the liquid crystal 15 is sealed inside the liquid crystal display panel 1. The liquid crystal display panel 1 is manufactured.

  Next, the operation of this embodiment will be described.

  According to the present embodiment, when the alignment film material is printed on the display electrode 8, the notch portion 14 is formed by cutting away the portion of the alignment film material that faces the transfer portion 11 in a direction away from the transfer portion 11. It is formed in the shape which has. For this reason, even when the alignment film material has spread and spread on the display electrode 8, the alignment film material is prevented from spreading to the position corresponding to the transfer portion 11 on the first display electrode 8a. It is possible to prevent the conductive connection area between the first display electrode 8a and the first electrode terminal 9a from becoming narrow in the transfer portion 11.

  Even when the alignment film material is printed on the end portion of the first electrode terminal 9a in the second transparent substrate 2b and spreads on the first electrode terminal 9a, the alignment film material remains the first electrode. It is also possible to prevent wetting and spreading to a position corresponding to the transfer portion 11 on the terminal 9a.

  Therefore, a sufficient conductive connection area between the first display electrode 8a and the first electrode terminal 9a can be ensured, thereby preventing poor conductive connection between the first display electrode 8a and the first electrode terminal 9a. Sufficient conduction can be achieved.

  Further, for example, when the alignment film material is printed, even if the printing position of the alignment film material is shifted to the transfer portion 11 side, the alignment film material is transferred to the first display electrode 8a or the first electrode terminal 9a. It is possible to prevent overlapping at a position corresponding to. Thereby, it is possible to prevent the conductive connection area between the first display electrode 8a and the first electrode terminal 9a from becoming narrow, and to achieve sufficient conduction between the first display electrode 8a and the first electrode terminal 9a. .

  In addition, this invention is not limited to the said embodiment, A various change is possible as needed.

  For example, in the present embodiment, the alignment film 13 is used as a thin film provided on the display electrode 8. However, the alignment film 13 is not limited to the alignment film 13. For example, an inorganic oxide insulating layer made of silicon oxide or the like, a color You may apply when providing a filter layer, a smoothing layer, etc.

(A) is a schematic plan view which shows one board | substrate of the display panel manufactured by the manufacturing method of the display panel which concerns on this invention, (b) is a schematic plan view which shows the other board | substrate of the said display panel. 1 is a schematic cross-sectional view of a display panel constituted by both substrates of FIG. Typical top view which shows the principal part of the shape of the orientation film printed by the manufacturing method of the other display panel which concerns on this invention (A) is a schematic plan view which shows one board | substrate of the display panel manufactured by the manufacturing method of the other display panel which concerns on this invention, (b) is a schematic plane which shows the other board | substrate of the said display panel. Figure Schematic sectional view showing a conventional display panel Schematic plan view showing the main part of the shape of the alignment film printed by a conventional display panel manufacturing method

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 2a 1st transparent substrate 2b 2nd transparent substrate 3 Terminal part 5 Seal material 6 Conductive particle 8a 1st display electrode 8b 2nd display electrode 9a 1st electrode terminal 9b 2nd electrode terminal 11 Transfer part 13 Orientation film 15 LCD 17 display area

Claims (2)

A first display electrode and a second display electrode are provided on inner surfaces of the first substrate and the second substrate facing each other, and are electrically connected to the first display electrode provided on the first substrate. An electrode terminal is provided on the second substrate,
In the inner display area surrounded by the arrangement position of the peripheral sealing material on the inner surfaces of the two substrates, a thin film is provided on both display electrodes,
The sealing material contains a conductive material, and is a method of manufacturing a display panel in which conductive connection between the first display electrode and the electrode terminal is performed in a transfer portion of the sealing material,
The thin film material of the thin film provided on the first substrate has a shape having a notch, and the notch has a portion facing the transfer portion between the seal material and the display region. A display panel manufacturing method, wherein the display panel is cut away in a direction away from the display panel.   The method for manufacturing a display panel according to claim 1, wherein the thin film is an alignment film that aligns liquid crystal sealed in the interior surrounded by the substrates and the sealing material in a predetermined direction.

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