JP3145262B2 - Liquid crystal display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used as a display provided in a word processor, a computer or an electronic organizer.

[0002]

2. Description of the Related Art In a conventional liquid crystal display device, as shown in FIG. 5, a printed circuit board 24 mounted on a liquid crystal panel 22 on a plate-like liquid crystal module 28 has a TCP (tape carrier packa).
ge) -A bezel 26 made of a metal frame is connected to the
It is attached via a spacer 25 between the bezel 26 and the plate-like liquid crystal module 28. In order to attach the liquid crystal display element to the device 21, there is a method in which screws 27 are fitted into mounting holes 26a provided in the bezel 26, and the screws 27 are further fixed to the device 21.

However, generally, like a liquid crystal display element 31 shown in FIG. 6, a plate-shaped liquid crystal module 28 is sandwiched between a chassis 30 made of plastic and a bezel 29, and is provided in advance in the bezel 29 shown in FIG. Claw 2
9a is bent and integrated. The liquid crystal display element 31 is attached to the device 21 in the following manner. That is, the mounting holes 29 b... Are formed in the bezel 29, or the same holes are formed in the chassis 30. As shown in FIG.
The liquid crystal display element 31 is mounted on the device 21 by fixing the screws 27 to the device 21 through the mounting holes 29b.

However, in this case, the bezel 29 and the chassis 3
0, and the fitting process between the chassis 30 and the plate-shaped liquid crystal module 28, respectively, causes variations in the mounting accuracy between them. Also, mounting holes 29b ...
There is a tolerance on the actual hole size. For these reasons, even if the equipment 21 of the bezel 29 or chassis 30
Even if the liquid crystal module 28 is precisely mounted, the position of the plate-shaped liquid crystal module 28 on the device 21 varies. The overall accuracy in attaching the liquid crystal display element 31 to the device 21 is represented by the sum of the fitting accuracy of each component.
It becomes as large as 800 μm.

In addition, as shown in FIGS. 9 and 10, in recent years, the downsizing of a device provided with a liquid crystal display device has caused the window frame 32 for incorporating the liquid crystal display device and the liquid crystal panel 22 of the device 21. The dimensional difference tends to decrease to about 1 to 2 mm. For this reason, the above-mentioned variation is more conspicuous, and the appearance is likely to deteriorate.

[0006] Therefore, in another example of assembly, a hole is formed in the bezel, and a mark serving as a mark of the position of the liquid crystal panel is provided in a portion of the liquid crystal panel corresponding to the hole. The mounting position of the LCD panel and the relative position of the LCD panel are adjusted. However, the operation is complicated and difficult, and the production efficiency is poor.

Therefore, as shown in FIG.
In the liquid crystal display element (film liquid crystal display element) using a film substrate made of a synthetic resin described in No. 174511, a portion of the plate-like liquid crystal module outside the frame 34 around the liquid crystal panel 33 and having no electrodes. Within 35
For example, it has been proposed to provide a mounting hole 35a, a cutout portion 35b, and a cutout portion 35c (hereinafter, collectively referred to as mounting holes and the like) and use these for mounting a liquid crystal display element to a device. In this case, as shown in FIG. 12, there is disclosed an example in which positions of the mounting holes and the like in each liquid crystal display element are slightly different depending on each liquid crystal display element.

According to this, since no bezel or chassis is required, the fitting accuracy between the bezel and the plate-shaped liquid crystal module and between the bezel and the chassis as described above do not matter.

[0009]

However, in the above-mentioned conventional technology, the accuracy of the position where the mounting holes and the like are opened, that is, the relative position between the mounting holes and the liquid crystal panel is low.
The accuracy of mounting the liquid crystal display device to the device is deteriorated.

When the mounting holes and the like are formed directly on the plate-shaped liquid crystal module, the plate-shaped liquid crystal module is directly mounted on the device because no bezel or chassis is required as described above. However, at this time, there is a possibility that the liquid crystal display element is erroneously turned upside down, and is attached to the same or another liquid crystal display element. As a result, there is a problem that each member constituting the liquid crystal display element is damaged.

For example, Japanese Patent Application Laid-Open No. 3-174511 described above.
In the example described as the film liquid crystal display element of No. 2, as shown in FIG. 12, if the liquid crystal display elements e and f are turned upside down, they will fit in the positions of the liquid crystal display elements h and g, respectively. However, if the positions of the mounting holes and the like on the plate-like liquid crystal module are changed for each liquid crystal display element in order to prevent this, the drilling and the mounting process to the device are complicated, resulting in poor production efficiency. Needless to say, when the position configuration of the mounting holes and the like is simpler than in this example, there is a higher possibility that the above-described front and back errors will occur.

The liquid crystal display element of the present invention has been made in view of the above problems, and its object is to improve the positional accuracy and to make the mounting surface not confused.
It is an object of the present invention to provide a liquid crystal display element which has high mounting accuracy to equipment and is easy to mount.

[0013]

[0014]

Means for Solving the Problems To solve the above problems,
Therefore, the liquid crystal display element according to claim 1 is provided with positioning portions for mounting the liquid crystal display element at four corners of the electrode substrate of the liquid crystal display element having a rectangular shape, and at two corners located on a diagonal line. Is characterized in that positioning portions having the same shape and size are formed, and positioning portions having the same shape and different sizes are formed on adjacent two corners.

The liquid crystal display element according to the second aspect is the first aspect.
In the liquid crystal display element described above, the positioning portion has a circular shape.

According to a third aspect of the present invention, a positioning portion for mounting the liquid crystal display element is provided at four corners of the electrode substrate of the rectangular liquid crystal display element, and a diagonally located diagonal line is provided. Is characterized in that positioning portions having the same shape and size are formed, while positioning portions having different shapes are formed in adjacent two corners.

The liquid crystal display device according to claim 4, wherein the claim 3
The liquid crystal display element described above is characterized in that one of the adjacent two corners is shaped like a hole and the other is shaped like a notch.

The liquid crystal display element according to the fifth aspect is the first aspect.
5. The liquid crystal display device according to any one of items 4 to 4, wherein a positioning portion for attaching the liquid crystal display device is formed based on a positioning portion forming mark formed as a part of the electrode pattern. I have.

[0019]

[0020]

[0021]

In the liquid crystal display device according to the first and third aspects, since the shape or size of the square positioning portion formed on the electrode substrate is different for each diagonal line, when the liquid crystal display device is mounted on a device or the like. Only when the front and back of the liquid crystal display element are oriented in the right direction, it can be attached to the device.

Therefore, it is possible to prevent the liquid crystal display element from being damaged by erroneously mounting the liquid crystal display element on the front and back sides, and to simplify the mounting to the device.

According to the structure of the liquid crystal display element of the second aspect , in addition to the above-described operation, since the shape of the positioning portion is circular, various types of positioning portions can be formed only by changing the diameter. Becomes possible.

Therefore, the formation of the positioning portion is simplified, and the accuracy of the shape of the positioning portion is remarkably improved, so that the liquid crystal display element can be easily and accurately mounted on the device.

According to the structure of the liquid crystal display element of the fourth aspect, the positioning portion located on one of the diagonal lines has a notch shape, and the rough positioning of the liquid crystal display element to the device is formed by the notch shape. By using the positioning unit, the liquid crystal display element can be mounted at a predetermined position with high accuracy and ease.
At the other diagonal hole-shaped positioning portion, the liquid crystal display element can be easily mounted on the device.

According to the structure of the liquid crystal display device described in claim 5 , the positioning portion can be formed with high accuracy in the liquid crystal display device according to any one of claims 1 to 4, and the mounting accuracy of the liquid crystal display device can be improved. Can be further improved.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1, in the liquid crystal display element 1 of the present embodiment, a liquid crystal panel 2 and a TCP-LSI 6 are formed on a plate-like liquid crystal module 5. Mounting holes 3.3 (positioning portion) and mounting holes 4.4 (positioning portion) for mounting the present liquid crystal display element 1 to the device are provided. Here, the mounting holes 3
3 has a triangular shape, and the mounting holes 4 are located at diagonal positions.
・ The shape of 4 is square.

The shapes of the mounting holes 3, 3, 4 and 4 are not limited to the above-mentioned triangles and quadrangles, and the shapes of a pair of mounting holes 3.3 on a diagonal line are the same. The mounting holes on the diagonal line have the same shape and are on different diagonal lines, that is, the mounting holes 3.3 and the mounting holes 4.4.
It is only necessary that the shape be different.

The shape of the positioning portion is, for example, as shown in FIG.
As shown in the figure, a combination of different notches such as a triangular notch 9.9 and a semicircular notch 10.10 may be used. In this case, the attachment of the liquid crystal panel 2 to the device is performed as follows.
A separate means for attachment, such as by being sandwiched between devices, is required, but the attachment holes 3, 3, 4,.
As compared with the fourth embodiment, there is an advantage that the useless area of the substrate can be reduced, and the liquid crystal panel can be easily arranged with high precision on the device.

When the positioning portion is made of, for example, a so-called stiff plastic sheet as the electrode substrate, it is possible to reduce the useless area of the substrate as described above, and to position and mount the liquid crystal panel. Work can be simplified.

A method for manufacturing the liquid crystal display element 1 of this embodiment shown in FIG. 1 will be described. First, when an electrode pattern is formed on an electrode substrate made of plastic, a portion serving as the liquid crystal panel 2 is formed on a portion of the surface of the electrode substrate which is outside the seal frame for enclosing liquid crystal and where no electrode pattern is formed. And four mounting holes 3, 3, 4, 4
Are formed corresponding to the positioning portions. Thereby, the accuracy of the relative position of the positioning portion forming mark with respect to the liquid crystal panel 2 can be made as high as ± 5 μm. By using the positioning portion forming marks, the mounting holes 3, 3, 4, and 4 can be formed with high positional accuracy.

Here, the shape of the mounting position mark is such that two positioned diagonally are the mounting holes 3 formed later.
A triangle corresponding to the shape of 3; the remaining two diagonal lines are quadrangles corresponding to the shapes of the mounting holes 4;

The material of the electrode substrate is not limited to plastic, but may be glass, for example.

Thereafter, an alignment film is formed, and a rubbing process is performed. Then, a seal frame is formed, and spacers for keeping a space between the two electrode substrates are sprayed. Further, the upper and lower electrode substrates are bonded together, and liquid crystal is injected. Thereby, the liquid crystal panel 2 is obtained.

Next, the position of the mark for forming the positioning portion of the liquid crystal panel 2 is adjusted with a magnifying glass attached to the NC milling machine. Thereby, the positioning accuracy, that is, the accuracy of the relative positions of the mounting holes 3, 3, 4, and 4 with respect to the liquid crystal panel 2 can be made as high as ± 50 μm. And N
Using a C milling machine, mounting holes 3.3 and mounting holes 4.4 are formed along the positioning portion forming marks. Thereby, the hole processing accuracy can be as high as ± 50 μm. Thus, the liquid crystal display element 1 is obtained. In this embodiment, the NC milling machine is used, but a drilling machine or the like can be used.

The total accuracy, that is, the positional accuracy between the liquid crystal panel 2 and the mounting holes 3, 3, 4 and 4 is (positional accuracy of forming the mark for forming the positioning portion: ± 5 μm) + (positioning accuracy: ± 50 μm) + ( (Accuracy of drilling: ± 50 μm), which is approximately ± 100 μm or less. This indicates that the overall accuracy of the present embodiment is good while the overall accuracy in the prior art is as large as about ± 800 μm.

The liquid crystal display element 1 can be mounted on the device by using four screws by using the mounting holes 3, 3, 4 and 4. That is, the mounting holes 3, 3, 4, and 4 are formed directly in the plate-shaped liquid crystal module 5 without using the conventional bezel and the bezel spacer interposed between the bezel and the plate-shaped liquid crystal module. There is no error caused by the fitting. Therefore, the positional accuracy between the liquid crystal panel 2 and the window frame of the device, that is, the mounting accuracy can be improved.

Further, as described above, the type and number of necessary members are reduced such that the bezel, the spacer for the bezel, and the chassis are unnecessary and the number of necessary screws is also reduced, so that the configuration is simplified. In addition, there is an advantage that attachment to the device is simplified.

As described above, the shape of the mounting holes 3 is triangular, and the shape of the mounting holes 4 is quadrangular. Thereby, when the present liquid crystal display element 1 is attached to a device, there is no possibility that the liquid crystal display element 1 may be turned upside down. Therefore, it is possible to prevent mechanical damage to the electronic components in the liquid crystal display element 1 such as, for example, application of a force in a direction of separating the connection of the TCP-LSI 6.

Embodiment 2 Another embodiment of the present invention will be described below with reference to FIG. For the sake of convenience, members having the same functions as those described above will be denoted by the same reference numerals and description thereof will be omitted.

The liquid crystal display element 1 of this embodiment is also manufactured in the same manner as in FIG. 1, but as shown in FIG.
The shape of 7 (positioning portion) is a circular shape with a diameter of 4 mm, and the shape of the mounting hole 8.8 (positioning portion) is 2 m in diameter.
m. At this time, the total accuracy is ± 100μ
m or less.

Even in such a shape, as described above, the positional accuracy between the liquid crystal panel 2 and the window frame of the device, that is, the mounting accuracy can be improved, and errors in the front and back of the liquid crystal display element 1 can be eliminated. Can be prevented. Furthermore, since it has a circular shape, it is easier to form the positioning portion, and since it is only necessary to change the diameter of the circle in order to identify the positioning portion on a different diagonal line, the shape of the positioning portion is the most. preferable.

For example, when a plastic film is used as an electrode substrate for a liquid crystal panel, by forming the positioning portion in a hole shape, a warp or undulation of the liquid crystal panel can be corrected by screws for attaching the liquid crystal panel to a device. Since the liquid crystal panel can be made flat, display quality is not impaired.

Embodiment 3 Another embodiment of the present invention is described below with reference to FIG. For the sake of convenience, members having the same functions as those described above will be denoted by the same reference numerals and description thereof will be omitted.

The liquid crystal display element 1 of the present embodiment is also manufactured in the same manner as in the first embodiment. However, as shown in FIG. 4, the type of the positioning portion is a type combining both FIG. 1 and FIG. One is a hole and the other is a notch.

The shape of the notch is a regular triangle having a side length of 3 mm, the notch is open on the adjacent side of the substrate, and the shape of the mounting hole formed at the other diagonal is:
The diameter is 4 mm.

In this embodiment, similarly to the above-described embodiment, there is an effect that the mounting can be performed with high accuracy without changing the front and back sides, and the rough mounting of the liquid crystal display panel can be easily performed by the notches 11. After mounting the liquid crystal display panel at a predetermined position, the liquid crystal display panel was mounted on the device through the mounting holes 12 and 12, whereby the workability was significantly improved.

In all of the above-described embodiments, the fitting of the positioning portions (mounting holes or notches) may be performed with strict accuracy. However, if the accuracy of at least two positioning portions is ensured, Since the position of the substrate is determined, workability is improved as compared with securing the accuracy of all the positioning portions. These two points are positioned (two diagonal points, two points on the same side).
The combination and shape of point) are not limited,
If two diagonal points having the same shape are selected, the processing time is reduced.

[0049]

[0050]

[0051]

As described above, according to the first aspect of the present invention,
The liquid crystal display element is provided with positioning portions for attaching the liquid crystal display element at four corners of the electrode substrate of the liquid crystal display element having a rectangular shape, and a diagonally located diagonal has a shape, size, The liquid crystal display device according to claim 3 , wherein the same positioning portion is formed, and positioning portions having the same shape and different sizes are formed at adjacent two corners. Positioning portions for mounting the liquid crystal display element are provided at four corners of the electrode substrate of the liquid crystal display device, and positioning portions having the same shape, size, and shape are formed at two corners located diagonally. On the other hand, a positioning portion having a different shape is formed in the adjacent two corners.

Therefore, any liquid crystal display element can be mounted on the device with high precision through the above-mentioned positioning portion, and the liquid crystal display device is damaged by erroneously mounting the device on the front and back sides. Problems can be prevented, and an effect that attachment to the device can be simplified can be achieved.

The liquid crystal display device according to the second aspect is the first aspect.
In the liquid crystal display element described above, the positioning portion has a circular shape.

Therefore, the positioning portion can be formed more easily, the accuracy of the shape of the positioning portion is significantly improved, and the mounting of the liquid crystal display element on the device can be performed easily and with high accuracy. Play.

The liquid crystal display device according to the fourth aspect is the third aspect.
In the liquid crystal display element described above, one of the adjacent two corners is shaped like a hole and the other is shaped like a cutout.

Therefore, the rough positioning of the liquid crystal panel on the device can be performed by the notch-shaped positioning portion, and the mounting of the liquid crystal panel on the device can be performed by the hole-shaped positioning portion. This has the effect of being able to be attached to equipment.

The liquid crystal display device according to the fifth aspect is the first aspect.
5. The liquid crystal display device according to any one of Items 4 to 4, wherein a positioning portion for mounting the liquid crystal display device is formed based on a positioning portion forming mark formed as a part of the electrode pattern.

[0058] Therefore, this way, according to claim 1 to 4 Noi
The liquid crystal display element according to any one of the first to third aspects has an effect that the accuracy of attachment to a device can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an entire liquid crystal display device according to one embodiment of the present invention.

FIG. 2 is a perspective view schematically showing an entire liquid crystal display element according to another example of the present invention.

FIG. 3 is a perspective view schematically showing an entire liquid crystal display element according to another example of the present invention.

FIG. 4 is a perspective view schematically showing an entire liquid crystal display element according to another example of the present invention.

FIG. 5 is a perspective view showing a conventional method of attaching a liquid crystal display element to a device.

FIG. 6 is a perspective view schematically showing the structure of another conventional liquid crystal display element.

FIG. 7 is an enlarged perspective view showing a part of the bezel in FIG. 6;

8 is a perspective view showing a method of attaching the liquid crystal display device of FIG. 6 to a device.

FIG. 9 is a plan view showing an outline of an entire device to which a conventional liquid crystal display element is attached.

FIG. 10 is an enlarged plan view showing a part of a window frame of the device indicated by A in FIG. 9;

FIG. 11 is a plan view showing the general outline of still another conventional liquid crystal display element.

FIG. 12 is a plan view showing the entire film substrate in a processing step of the liquid crystal display element of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal display element 2 Liquid crystal panel 3 Mounting hole (positioning part) 4 Mounting hole (positioning part) 5 Plate-shaped liquid crystal module 6 TCP-LSI 7 Mounting hole (positioning part) 8 Mounting hole (positioning part) 9 Notch (positioning part) ) 10 Notch (positioning part) 11 Notch (positioning part) 12 Mounting hole (positioning part)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1333 500 G02F 1/13 505 G02F 1/1343

Claims (5)

(57) [Claims] 1. A positioning portion for mounting a liquid crystal display element is provided at four corners of a rectangular electrode substrate of a liquid crystal display element, and two corners located on a diagonal line have shapes, sizes, A liquid crystal display element, wherein the same positioning portion is formed, and positioning portions having the same shape and different sizes are formed in adjacent two corners. 2. A liquid crystal display device according to claim 1, wherein the positioning unit is characterized in that it is a circular shape. 3. A positioning portion for mounting a liquid crystal display element is provided at four corners of a rectangular electrode substrate of a liquid crystal display element, and a shape, size, A liquid crystal display element, wherein the same positioning portion is formed, and positioning portions having different shapes are formed in adjacent two corners. 4. The liquid crystal display element according to claim 3 , wherein one of the adjacent two corners is shaped like a hole and the other is shaped like a notch. 5. Based on the mark positioning part formed which is formed as a part of the electrode pattern, any one of the preceding claims, characterized in that the positioning portion for mounting the liquid crystal display element is formed 1 A liquid crystal display element according to the item .