JPH07318963A - Method for packaging tape carrier package to liquid crystal unit and liquid crystal unit - Google Patents

Abstract

PURPOSE:To improve the visibility of alignment marks at the time of packaging and to reduce the cost of a liquid crystal display unit with a method for packaging a tape carrier package unit (TCP) to the liquid crystal display unit and the liquid crystal display unit packaged with this TCP. CONSTITUTION:Holes 2a or notches 2b are formed in the positions of the TCP corresponding to the alignment marks on the liquid crystal cell and the TCP is packaged by aligning the hole parts 2a or the notches 2b to the alignment marks on the liquid crystal cell in alignment of the liquid crystal cell and the TCP at the time of packaging the TCP onto the liquid crystal cell. The hole parts 2a or the notches 2b for alignment are formed in the packaging stage of the TCP or the hole parts 2a or the notches 2b for alignment are formed at the time of blanking the TCP to a packaging shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a tape carrier package (TCP) in a liquid crystal display unit, and a liquid crystal display unit mounted with the TCP.

[0002]

2. Description of the Related Art FIG. 2 is a structural example of a liquid crystal display unit. The liquid crystal cell 1 is one in which liquid crystal is sealed between glass plates, and a transparent electrode (ITO pattern) printed and printed on the glass plate of the liquid crystal cell and a driver (integrated circuit) for driving the liquid crystal cell are mounted. The tape carrier package (hereinafter sometimes referred to as TCP) 2
Connect using an anisotropic conductive film (ACF). After that, the liquid crystal display unit is completed by connecting the printed circuit board on which the logic circuit for the driver (integrated circuit) for driving the liquid crystal cell is mounted by soldering.

When the lead of the tape carrier package (TCP) 2 and the transparent electrode of the liquid crystal cell are bonded and connected with an anisotropic conductive film (ACF), the alignment is TCP 2
And each alignment mark on the liquid crystal cell 1,
On a monitor screen, which will be described later, it is automatically adjusted by visual observation or image recognition.

FIG. 3 shows the relationship between the liquid crystal cell 1 and the TCP 2, and FIG. 4 shows the procedure for assembling the liquid crystal display unit. First, in FIG. 3, TCP 2 is rewound from the reel and taken out, punched out at the portion surrounded by the dotted line in the figure, and in order to bond the punched TCP 2 and the liquid crystal cell 1, the anisotropic conductive film ( ACF) in place
Attach it to the liquid crystal cell 1 side or the TCP side. {Refer to the assembly step (1) in FIG. 4} Next, after punching out the TCP 2 to form a mounting shape, the alignment mark of the liquid crystal cell 1 and the TCP 2 {FIG. 3
, A)}, TCP 2 is positioned and temporary crimping is performed. After the above-mentioned temporary pressure bonding, main pressure bonding is performed. {Refer to assembly steps (2) and (3) in Fig. 4} Next, align the leads of TCP 2 with the foot pattern of the printed circuit board, and print the foot pattern of the printed circuit board in units of TCP 2. Solder (reflow bonding) to. {Refer to the assembly step (4) in FIG. 4} FIG. 5 shows the TCP 2 lead and the transparent electrode of the liquid crystal cell.
FIG. 6 is a diagram for explaining an alignment optical system for aligning the alignment marks and a of the TCP 2 and the liquid crystal cell 1 in connection with (ITO pattern). a) shows a side view and FIG. 5 (b) shows a front view.

In FIG. 5, the glass rod is a jig for mounting the liquid crystal cell 1, and the TCP fixing plate is mounted with TCP 2, vacuum-adsorbed, and then rotated by 180 degrees, and then, as shown in FIG. As shown in the side view, with the TCP 2 down,
Alignment mark of liquid crystal cell 1 shown in
This is a jig for aligning the second alignment mark a.

When the alignment marks and a are aligned, light is emitted from the irradiation light source shown in the front view of FIG. 5 to allow the glass rod and the liquid crystal cell 1 to pass therethrough, and to transmit the light from TCP 2. The reflection image is captured by, for example, a CCD camera and displayed on the monitor screen.

An example of the monitor screen at this time is shown in FIG. As shown in FIG. 6, on the monitor screen, an alignment mark on the liquid crystal cell 1 side (indicated by a hatched circle) and an alignment mark on the TCP 2 side (indicated by a double circle) a Is displayed, the position of the TCP fixing plate of, for example, the assembly jig described in FIG. 5 is adjusted so that the two alignment marks and a are exactly overlapped as shown in the figure.

When this alignment is successful, as shown in FIG. 6, the transparent electrode (ITO pattern) of the liquid crystal cell 1 is formed.
Can match the TCP lead.

[0009]

Conventionally, the alignment marks and a have been aligned with each other visually on a monitor screen or automatically by image recognition. All of them are common in that they are performed by recognizing the alignment mark a of TCP 2 and the alignment mark of liquid crystal cell 1, and there is a problem that the alignment mark (due to the transparent electrode pattern) on the liquid crystal cell is difficult to see.

That is, in the conventional alignment mark recognition method, the alignment mark is irradiated with light and the reflected image thereof is recognized. However, the transparent electrode pattern (ITO pattern) has a light transmittance depending on its resistance value. Change.

On the other hand, the alignment mark a on TCP 2
Looks better when the irradiation light is increased due to its reflectance,
If the irradiation light is weakened, it becomes difficult to see. On the contrary, in the alignment mark having the transparent electrode pattern (ITO pattern), it becomes difficult to see when the irradiation light is increased, and it becomes easy to see when the irradiation light is decreased.

Therefore, the transparent electrode pattern (ITO pattern)
When using liquid crystal cells with different resistance values, the optimum irradiation light was set while adjusting the intensity and direction of the irradiation light. However, if the light is adjusted as described above, it should be easy to see. The alignment mark due to the transparent electrode pattern (ITO pattern) may be difficult to see. That is, it is originally difficult to simultaneously obtain the best visibility for the two types of alignment marks a by the reflected light.

In view of the above-mentioned conventional drawbacks, the present invention provides, for example,
Tape carrier package (T
(CP) mounting method and a mounting method capable of improving the visibility of the alignment mark, a at the time of mounting, and reducing the cost of the liquid crystal display unit in the liquid crystal display unit mounted with the TCP The purpose is.

[0014]

FIG. 1 is a diagram showing an embodiment of the present invention. The above problems can be solved by a method of mounting a tape carrier package in a liquid crystal unit and a liquid crystal unit configured as described below.

(1) When the tape carrier package 2 is mounted on the liquid crystal cell 1, the liquid crystal cell 1 and the tape carrier package 2 are aligned with each other.
A hole a is provided at the position of the tape carrier package 2 corresponding to the alignment mark on the liquid crystal cell 1, and the hole a is aligned with the alignment mark on the liquid crystal cell 1 to be mounted.

(2) When the tape carrier package 2 is mounted on the liquid crystal cell 1, the liquid crystal cell 1 and the tape carrier package 2 are aligned with each other.
A notch portion b is provided at a position of the tape carrier package 2 corresponding to the alignment mark on 1, and the notch portion b is aligned and mounted on the alignment mark on the liquid crystal cell 1.

(3) When the tape carrier package 2 is mounted on the liquid crystal cell 1, the liquid crystal cell 1 and the tape carrier package 2 are aligned with each other.
In order to provide the alignment hole portion a or the notch portion b at the position of the tape carrier package 2 corresponding to the alignment mark on 1, the tape carrier package 2 is provided at the stage of mounting the tape carrier package 2 in the liquid crystal cell 1. To configure.

(4) When the tape carrier package 2 is mounted on the liquid crystal cell 1, the liquid crystal cell 1 and the tape carrier package 2 are aligned with each other.
1. To provide the alignment hole a or the notch b at the position of the tape carrier package 2 corresponding to the alignment mark on 1, the tape carrier package 2 is provided when punching into the mounting shape. To do.

[0019]

That is, the method of mounting the tape carrier package in the liquid crystal display unit according to the present invention is a method of recognizing the TCP 2 and the alignment mark a of the liquid crystal cell 1 at the same time and performing the alignment, in which the transparent layer on the liquid crystal cell 1 is transparent. The alignment mark by the electrode (ITO) is the same as the conventional one, and the alignment mark a for TCP 2 is
By providing a hole a or a notch b at a position corresponding to
Was needed in the way to monitor the pattern itself,
It does not require adjustment of irradiation light. That is, the alignment mark a of the TCP 2, specifically, the hole a or the notch b of the TCP 2 is irradiated with an amount of irradiation light that allows the alignment mark by the transparent electrode (ITO) on the liquid crystal cell 1 to be well recognized. It is designed to be fully recognizable.

According to the conventional method, the tape material portion of TCP 2 and the alignment mark (same quality as the conductor pattern) are to be identified in the reflected light image, but the difference in the amount of reflected light at each portion is small, so the monitor screen The adjustment of irradiation light (irradiation angle, light intensity) for the above discrimination was complicated.
On the other hand, as in the present invention, by making the alignment mark a in TCP 2 the hole a or the notch b, the tape material part and the hole a or the notch b There is an effect that the difference in the amount of reflected light can be increased and the image can be easily recognized.

[0021]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 described above is a diagram showing an embodiment of the present invention.

In the present invention, the liquid crystal cell 1 is provided with TCP 2
When aligning the liquid crystal cells 1 and TCP 2 when mounting, a means for providing a hole a or a notch b at the position of TCP 2 corresponding to the alignment mark on the liquid crystal cell 1 is provided. , The means necessary to carry out the present invention. The same reference numerals indicate the same objects throughout the drawings.

Hereinafter, the conventional TCP 2 described with reference to FIGS.
Referring to FIG. 1, the method of mounting TCP in the liquid crystal display unit of the present invention will be described with reference to the method of mounting. Even if the TCP 2 is mounted on the liquid crystal cell 1 according to the present invention, the procedure for aligning the alignment marks described in FIGS. 2 to 6 and the procedure for assembling (mounting) the liquid crystal display unit itself are Since it does not change, details are omitted.

In the TCP 2 mounting method according to the present invention, as shown in FIGS. 1 (a) and 1 (b), the alignment mark portion on the TCP 2 is provided with a hole a or a notch. Change to part b.

By doing so, the difference in the amount of reflected light between the hole a or the notch b and its surroundings can be increased, so that the distinguishable light amount range can be increased. Specifically, if the alignment mark of the transparent electrode (ITO) on the liquid crystal cell 1 is adjusted so that it can be identified, TC
With the alignment mark (hole a or notch b) on P 2, it can be easily identified.

The hole a may be provided in the TCP 2 as shown in FIG. 1 (a), or as shown in FIG. 1 (b), the notch at the edge of the TCP 2 may be formed. You may implement | achieve as part b.

When making a hole in the TCP 2, the hole can be easily formed, for example, by preparing a jig in which a pin is set up in a punching die. Further, if a notch-shaped alignment mark is provided at the edge portion of TCP 2, since it is continuous with the edge cutting line, it is possible to reduce the occurrence of breakage of the pin-type jig in the punching die.

The punching process of the alignment mark may be performed during the rough punching of TCP 2 (see the assembling step (1) in FIG. 4: the step of punching into the shape before the ACF is attached), or the liquid crystal cell 1 Just before implementing TCP 2,
You may go in the state of. The shape of the hole or notch is circular as shown in FIG. 1, or
It is needless to say that the shape is not limited to the semicircle, and any shape can be used as long as it can recognize the alignment mark of the transparent electrode (ITO) on the liquid crystal cell 1. is there.

In the above embodiments, the liquid crystal display unit has been described as an example, but it is needless to say that the present invention is not limited to the liquid crystal display unit and can be applied to, for example, a liquid crystal unit for a shutter. Is.

Thus, according to the present invention, for example, a tape carrier package (TCP) in a liquid crystal display unit.
The mounting method is that when TCP is mounted on the liquid crystal cell, when aligning the liquid crystal cell and the TCP, there is a hole a or a notch at the TCP position corresponding to the alignment mark on the liquid crystal cell. The portion b is provided, and the hole a or the notch b is aligned with the alignment mark on the liquid crystal cell for mounting. The hole a for alignment or the notch b is provided at the stage of mounting the TCP, or the hole a for alignment a,
Alternatively, it is characterized in that the notch b is provided at the time of punching into the TCP mounting shape.

[0031]

As described above in detail, according to the present invention, even if liquid crystal cells having different transparent electrode (ITO) resistance values are used, it is not necessary to adjust the light amount of the irradiation light source for monitoring. The alignment mark formed by the transparent electrode (ITO) and the alignment mark (hole) of the TCP are easily aligned, and the TCP mounting time can be shortened. As a result, the cost of the liquid crystal unit can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a structural example diagram of a liquid crystal display unit.

FIG. 3 is a relationship diagram of a liquid crystal cell and a tape carrier package.

FIG. 4 is a diagram showing a procedure for assembling the liquid crystal display unit.

FIG. 5 is a diagram illustrating an alignment optical system.

FIG. 6 is a diagram illustrating a conventional alignment state.

[Explanation of symbols] 1 Liquid crystal cell 2 Tape carrier package (TCP), a Alignment mark a Hole b Cutout

Claims (5)

[Claims] 1. When aligning a tape carrier package (2) with a liquid crystal cell (1), the liquid crystal cell (1) and the tape carrier package (2) are aligned on the liquid crystal cell (1). Align the holes () at the position of the tape carrier package (2) that corresponds to the alignment mark () of
A method of mounting a tape carrier package in a liquid crystal unit, characterized in that a) is provided and the hole (a) is aligned with the alignment mark () on the liquid crystal cell (1). 2. When the tape carrier package (2) is mounted on the liquid crystal cell (1), the liquid crystal cell (1) and the tape carrier package (2) are aligned on the liquid crystal cell (1). Align the notch on the tape carrier package (2) with the alignment mark () on the
A method of mounting a tape carrier package in a liquid crystal unit, wherein (b) is provided, and the notch (b) is mounted in alignment with the alignment mark () on the liquid crystal cell (1). 3. When aligning the liquid crystal cell (1) and the tape carrier package (2) when the tape carrier package (2) is mounted on the liquid crystal cell (1), At the position of the tape carrier package (2) corresponding to the alignment mark () of the above, the tape carrier package (2) is provided with the alignment hole (a) or the notch (b). The method for mounting a tape carrier package in a liquid crystal unit according to claim 1 or 2, wherein the mounting method is provided at the stage of mounting in the cell (1). 4. When aligning the liquid crystal cell (1) and the tape carrier package (2) when the tape carrier package (2) is mounted on the liquid crystal cell (1), the liquid crystal cell (1) The tape carrier package (2) is mounted on the tape carrier package (2) at the position corresponding to the alignment mark () of the tape carrier package (2) to provide the alignment hole (a) or the notch (b). The method for mounting a tape carrier package in a liquid crystal unit according to claim 1, wherein the tape carrier package is mounted at the time of punching. 5. An alignment mark on the liquid crystal cell (1)
In (), the alignment mark () on the liquid crystal cell (1)
Position the hole (a) or the notch (b) of the tape carrier package (2) provided with the hole (a) or the notch (b) at the position corresponding to Mounted liquid crystal unit.