JPH03102389A - Mounting method and jig for liquid crystal cell and drive board - Google Patents

Abstract

PURPOSE:To realize the fitting jig and fitting method which facilitate a fitting process for the liquid crystal cell and driving substrate by previously printing a matching mark for specifying the fitting position of the driving substrate at the cut part of a glass substrate when a liquid crystal cell is formed and positioning the driving substrate. CONSTITUTION:When the glass substrate 1 is manufactured, jig-side matching marks 5 are printed at cut parts 4 with the same plate with a transparent electrode 5 at the printing point of time of the transparent electrode 3, i.e. before a cutting process to obtain the fitting jig 6 for the fitting process for the liquid crystal cell and driving substrate which is performed later. The jig- side matching mark 5 provided to the fitting jig 6 and the substrate-side matching mark 8 of the driving substrate 7 are aligned with each other for temporary fitting, and consequently the driving substrate 7 is arranged at the accurate fitting position to the side where the fitting jig 6 is cut. Then lead-out lines 3a of the substrate 7 and terminal parts 7c of the substrate are joined by a proper means to join the driving substrate 7 with the side at an accurate position.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an attachment method for attaching a drive circuit to a liquid crystal cell having a large number of lead lines, such as a dot matrix driven liquid crystal cell, and a jig therefor.

[Conventional technology]

FIG. 5 shows an example of how an external circuit is connected to a liquid crystal cell 31 having a large number of lead lines, such as for a television receiver. Since the liquid crystal cell 31 is driven by a dot matrix method, the same number of lead lines 31a are provided on the side surfaces of the liquid crystal cell 31. Here, if the drive IC 32a used has, for example, 32 drive outputs, the liquid crystal cell 3
Eight drive ICs 32a need to be attached to the vertical side 31V of 1, and ten drive ICs 32a need to be attached to the horizontal side 31H. In this installation, the driving IC 32a is arranged on a flexible substrate 32b which is provided with fine wiring having the same pitch as the lead wires 31a of the liquid crystal cell 31, and is used as the driving substrate 32. The drive substrates 32 are bonded to the liquid crystal cell 31 using, for example, a conductive adhesive or an anisotropic conductive film while checking visually or using a magnifying glass to ensure that each driving substrate 32 is in a predetermined position. becomes.

[Problem to be solved by the invention]

However, in the actual process of joining the lead wires 31a and the driving board 32, the pitch at which the lead wires 31a are arranged is very fine, specifically about 0.2 to 0.5-w+. Therefore, the above-mentioned installation method that relies on visual inspection requires very careful and difficult work, and for this reason, there is a problem that the work efficiency of this process is reduced and productivity is hindered, and the defective rate is also high. Problems have arisen in that the production efficiency is also reduced, and solving these problems has become an issue.

[Means for Solving the Problems] The present invention provides a method for attaching a plurality of driving substrates to one side of a liquid crystal cell having a large number of leader lines, as a specific means for solving the conventional problems described above. When forming the liquid crystal cell, a reference mark designating the mounting position of the driving board is printed in advance on the cut part of the glass substrate, and the reference mark on the cut part is used to attach the drive board. A method for attaching a liquid crystal cell and a driving substrate, which is characterized in that the liquid crystal cell is attached to the liquid crystal cell by positioning, and a cut portion of the glass substrate of the liquid crystal cell in the forming process when forming the liquid crystal cell. A mounting jig for a liquid crystal cell and a driving board, characterized in that a mark for designating the mounting position of a plurality of driving boards is printed in advance so as to correspond to a leader line of the liquid crystal cell. By providing this, it is possible to facilitate the above-mentioned mounting process and reduce the defective rate, thereby solving the above-mentioned conventional problems.

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. What is indicated by reference numeral 1 in FIG. 1 is a glass substrate of a liquid crystal cell having a large number of leader lines 3a as described in the conventional example. The transparent electrode 3 is formed by means such as printing, and at this time, considering printing errors, the glass plate 2 is appropriately larger in area than the minimum required area, and the printing is completed. It is later cut along the cutting line OL to a predetermined size. Therefore, in the conventional example, a cut-off portion 4 is generated in the cutting process, and this cut-off portion 4 is discarded as unnecessary. Incidentally, since the glass substrate 1 is provided with a large number of leader lines 3a as explained in the conventional example,
If all of them are shown accurately, they may become complicated and difficult to understand, so they are omitted as appropriate in this figure and the drawings that follow. In the present invention, at the time of printing the transparent electrode 3, that is, before the cutting process, a jig-side reference mark 5 is printed on the cut-off part 4 using the same plate as the transparent electrode 3 at the same time, and it is separated in the cutting process. The cut-off portion 4 is used as a mounting jig 6 for the subsequent step of mounting the liquid crystal cell and the driving board. Below, the mounting jig 6 will be explained in more detail. First, what is shown in FIG. 2 is a driving board 7, and as explained above, this driving board 7 has a driving IC 7a.
are arranged on a flexible substrate 7b which is wired so as to be connectable to the lead wire 3a provided on the glass substrate 1 and provided with a terminal portion 7c, and naturally the terminal portion 7c and The lead wires 3a are formed with the same number and the same pitch. In the present invention, a substrate side composite mark 8 is also provided on the drive substrate 7 side.
is provided corresponding to the jig side reference mark 5, and when the board side reference mark 8 is matched with the jig side reference mark 5, the terminal portion 7c is connected to the leader line 3a. The terminal portions 7C are provided on the same plate and at the same time by means such as etching when providing the terminal portions 7C so as to have a positional relationship suitable for the terminal portions 7C. The eighth one shows the mounting jig 6 obtained as described above.
Although only a part of the diagram is shown, originally a glass substrate 1
Since it is formed as a part of the glass substrate 1
The driving board 7 is attached to the side where the saw mounting jig 6 is cut off.
All information such as the number and location of installations is accurately included. The drive substrate 7 shown in FIG. 4 is attached to the glass substrate 1 (in the actual process, the glass substrate 1 has already been assembled as a liquid crystal cell) using the mounting jig 6. This shows a mounting method for attaching the glass substrate by aligning and temporarily attaching the board-side marks 8 of the driving board 7 to each of the jig-side marks 5 provided on the mounting jig 6. 1
Since all of the driving substrates 7 are placed in the correct mounting positions relative to the side where the mounting jig 6 is cut off, the lead wires 3a of the glass substrate 1 and the terminal portions 7c of the driving substrate 7 are then placed. If these are bonded using an appropriate means such as a conductive adhesive or an anisotropic conductive film, all of the drive substrates 7 for this side will be bonded at accurate positions, and other sides will also be bonded from that side. By performing the same procedure using the cut-off mounting jig 6, it is possible to perform the same accurate mounting. Next, the effects of the above-described mounting jig 6 of the present invention will be explained. Since this mounting jig 6 is originally integrated with the glass substrate 1 to which the drive substrate 7 is to be attached, the purpose of the mounting jig 6 is as follows. The accuracy of relative positions, etc., will be as high as you can hope for. That is, in a liquid crystal cell in which the leader lines 3a of this type are arranged extremely precisely at a pitch of about 0.2 m, the glass may be damaged after printing due to temperature errors of the printing plate when printing the transparent electrodes 3, for example. Although an error of about one pitch from the specified dimensions easily occurs on the substrate 1, even in this case, there is no dimensional difference between the glass substrate 1 and the mounting jig 6, and no inconvenience occurs in the mounting process. Further, the mounting jig 6 is used in a one-on-one manner during manufacturing of the glass substrate 1.
Since it is formed as a plastic, there is no need to use it repeatedly, and it can be disposed of as is after use, which simplifies management.Furthermore, it allows the use of parts that were previously discarded. , no additional costs are incurred in forming this mounting jig 6.

【Effect of the invention】

As explained above, according to the present invention, a reference point for specifying the attachment position of a plurality of drive substrates is preliminarily set in the cut portion in the process of forming the glass substrate of the liquid crystal cell so as to correspond to the leader line of the liquid crystal cell. By using a mounting jig that is printed on the board, and by using the mounting jig to attach the liquid crystal cell and the driving board, firstly, the part that should be essentially mounted can be used as a mounting jig. It is exactly the same as the conventional method, and it is possible to provide a high-precision jig that is unaffected by temperature conditions during manufacturing, for example, and has an outstanding effect that enables high-precision bonding of drive boards. Second, it is possible to create a mounting jig by simply adding a reference mark using parts that would previously have been discarded, and therefore there is no cost involved in obtaining this mounting jig. It can be carried out at a low cost, and since the mounting jig is automatically produced in accordance with the number of glass substrates produced, this mounting jig can be used repeatedly like conventional general production jigs. There is no need for it, and it can be discarded after one use, making it extremely simple in terms of management.
This has the excellent effect of not causing any increase in production costs.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of a mounting jig for a liquid crystal cell and a driving board according to the present invention, FIG. 2 is an enlarged plan view showing main parts of a driving board of the same embodiment, and FIG. 4 is an enlarged plan view showing the main parts of the mounting jig, FIG. 4 is a plan view showing an embodiment of the method for mounting a liquid crystal cell and a driving board according to the present invention, and FIG. 5 is a conventional example. FIG. 1------Glass substrate 2---------
-Glass plate 3 ------- One clear electrode 3 a--------- One leader line 4 ---------- Completely dropped part 5 ------- One jig side reference mark e ----------1 Mounting jig 7--1 Driving board 7 a--1 Driving IC 7 b--1 Flexible board 7 c -1-----1 terminal part 8 -----1 board side joint

Claims (2)

[Claims] (1) In a method for attaching a plurality of driving substrates to one side of a liquid crystal cell having a large number of lead lines, when forming the liquid crystal cell, the mounting position of the driving substrate is set at a cut portion of the glass substrate. A method for connecting a liquid crystal cell and a driving substrate, characterized in that a specified reference mark is printed in advance, and the driving board is positioned using the reference mark on the cut-off portion to be attached to the liquid crystal cell. Installation method. (2) When forming a liquid crystal cell, a mark is placed on the cut portion of the glass substrate of this liquid crystal cell in the forming process to specify the mounting position of a plurality of driving substrates so as to correspond to the leader line of the liquid crystal cell. A mounting jig for a liquid crystal cell and a driving board, characterized in that it is printed in advance.