JP2001042303A - Electro-optic device and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a corner part of a substrate from generating cracks or chips by radiusing the corner part of the substrate. SOLUTION: A liquid crystal panel 11 is produced by disposing and laminating a pair of light-transmitting substrates with a sealing material 2, namely, an element substrate 1a to mount MIM elements and a counter substrate 1b facing the element substrate 1a. In this method, the liquid crystal panel 11 is obtained by cutting corners of the liquid crystal panel mother material (from 1a-1 to 1a-4 and 1b-1 to 1b-4) along a desired curved line R having (r) mm radius of curvature. The obtained liquid crystal panel 11 has a smooth cut face and no sharp apex in the corner (from 1a-1 to 1a-4 to 1b-1 to 1b-4) and has high shock resistance so that even in an assembling process of an electro- optic device in the succeeding process, the corners (from 1a-1 to 1a-4 and 1b-1 to 1b-4) are hardly broken. A proper range of the radius of curvature (r) mm is expressed by t/2<=r<=4, wherein (t) mm is thickness of the glass substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electro-optical device and a method of manufacturing the same, and more particularly, to an electro-optical device in which a corner portion of a substrate has a radius of curvature (r).

[0002]

2. Description of the Related Art A liquid crystal display device, which is a typical electro-optical device, includes a liquid crystal display panel formed by enclosing an electro-optical material such as liquid crystal between a pair of substrates. , And an auxiliary element such as a support. For example, a liquid crystal panel used in a liquid crystal display device which is an embodiment of the electro-optical device includes a pair of substrates 1 as shown by reference numeral 11 in FIG.
a and 1b are attached to each other so as to face each other.
And 1b by enclosing the liquid crystal substance 3 in a minute gap formed between them.

An electro-optical device having a structure in which two substrates are attached to each other so as to face each other includes an electroluminescence device, a plasma display device, and the like in addition to a liquid crystal device.

Now, a method of manufacturing a liquid crystal panel used for the liquid crystal device will be described as an example. A liquid crystal panel 11 as shown in FIG. 12 is obtained from a liquid crystal panel base material 16 as shown in FIG. That is, necessary components are formed in the liquid crystal substrate regions 4a and 4b on the surfaces of the pair of substrate preforms 51a and 51b, and then the substrate preforms 51a and 51b are bonded to each other with a minute gap to form a liquid crystal panel base. The substrate 16 is formed by cutting each of the substrate preforms 51a and 51b of the liquid crystal panel preform 16 into a predetermined shape.

[0005] The term "substrate base material" as used herein means a material for forming a liquid crystal panel. "Liquid crystal panel base material" refers to a liquid crystal panel mounted with components necessary for the configuration of the liquid crystal panel.
It is made by laminating two substrates. The “liquid crystal substrate region” refers to a region where components required for the configuration of the liquid crystal panel on the substrate are to be mounted. One liquid crystal panel base material may include only one liquid crystal substrate region, or may include a plurality of liquid crystal substrate regions.

[0006] The method of cutting a liquid crystal panel preform, after providing the scribed grooves L _A to a predetermined position along the outer periphery of the liquid crystal substrate region 4b of the surface of the first one of the substrate base material 51b, forming the scribe groove L _A The cut portion is pressed from the opposite side of the substrate preform 51b (that is, the substrate preform 51a side), thereby causing the crack generated from the scribe groove as a starting point to progress, thereby cutting the substrate preform 51b. Then a predetermined position along the liquid crystal substrate region 4a of the surface of the other substrate base material 51a, scribed grooves in the same manner as described above L _B
The provided, scribe grooves L _B the provided portion of the substrate base material 51
a from the opposite side (that is, the substrate preform 51b side),
Thus by proceeding cracks generated starting from the scribe groove L _B, performing cutting of the substrate base material 51a.

To form the scribe grooves, as shown in FIG. 14A, a disk-shaped scribe roller 9 made of a hard substance whose outer peripheral tip is sharp in the entire circumferential direction, and a scribe roller 9 are shown. A linear groove composed of an elevating device 21 for raising and lowering in the direction of the arrow (B-B '), and a linear moving device 22 for linearly reciprocating the entire scribe roller 9 and the elevating device 21 in a direction perpendicular to the paper surface. The forming device 7 is used.

First, the substrate base material 51 to be cut is
1b with the scribe groove L on the processing stage 52 facing upward.
_A transports to a predetermined cutting position, and then moves up and down
To activate the scribe roller 9 to move the substrate base material 51b.
At a predetermined pressure. In this state, the linear moving device 22 is operated to reciprocate the scribe roller 9 in the direction perpendicular to the paper. Thus scribing roller 9 is moved while rolling the surface of the substrate base material 1b, reference numeral L _A in Figure in a predetermined position of the resulting substrate base material 51b surface
, A so-called scribe groove 54 is formed.

In order to press the portion where the scribe groove 54 is formed from the opposite side of the substrate, the lifting drive 24 supported by the machine frame 23 as shown in FIG.
A pressing device 8 having a pressing element 26 having a distal end made of hard rubber is used.

[0010] invert the liquid crystal panel base material 16 as described above scribed grooves L _A is formed, scribed grooves L _A
The pressing element 26 of the pressing device 8 is applied to the back side (the side of the substrate preform 51a) on which is formed, and the lifting drive device 24 is driven, for example, so as to hit the substrate preform for a predetermined short time. Thus a crack occurs starting from the scribe groove L _A, substrate base material 51b is cut along a predetermined scribe groove L _A.

The cutting process as described above is performed on each substrate base material 51a.
12 and the liquid crystal panel 11 shown in FIG. 12 are obtained from the liquid crystal panel base material 16 shown in FIG. The corner portion of each substrate of the liquid crystal panel 11 thus obtained has a sharp and sharp shape because the straight cutting lines are formed to cross each other.

When the liquid crystal panel 11 is small, a large liquid crystal panel base material 16 as shown in FIG. That is, after the elements necessary for the plurality of liquid crystal substrate regions 4 are respectively formed on the surfaces of the pair of substrate base materials 51a and 51b, the plurality of liquid crystal substrate regions 4 are superimposed to form the substrate base materials 51a and 51b.
Are attached to each other with a minute gap. Thereafter, along the outer periphery of each liquid crystal substrate region 4, the substrate base materials 51a and 51
b is formed by cutting into a predetermined shape.
The cutting method employs a method of pressing after forming the scribe grooves as described above.

In FIG. 15, four liquid crystal substrate regions are arranged on one substrate base material. A large liquid crystal panel base material 16 as shown in FIG. 15 is first cut into half as shown in FIG. 16 to obtain a medium-sized liquid crystal panel base material 17, and then each liquid crystal panel base material 17 is further cut into half. As shown in FIG. 17, four liquid crystal panels 11 of a predetermined size are obtained. FIG.
16 and, the code _L A ~L _E is a cutting line of the substrate base material.

[0014] In FIG. 15, the cutting lines _{L A} and _{L B}
The cutting line of the substrate base material 51b, _{L C} is the cutting line of the substrate base material 51a. As a result, the cutting line _{L B} and the cutting line _{L C}
Overlap and both are cut. Portion of the cutting line L _A is end member 18 is cut off because only substrate base material 51b.

Similarly, in FIG. 16, each liquid crystal panel base material 17 is cut in half, and the end material 18 is cut off.
A liquid crystal panel 11 having a predetermined size shown in FIG. 7 is obtained. Here, the portion obtained by cutting off the end material 18 becomes the terminal portion 15. The corners of each substrate of the liquid crystal panel 11 thus obtained also have a sharp and pointed shape.

[0016]

Heretofore, it has been possible to diagonally cut the corners of the substrate obliquely in order to avoid sharp and sharp shapes at the corners of the substrate. Was impossible.

The above-described cutting method uses the scribe roller 9
, A minute crack is generated on the substrate surface, and the crack is grown by pressing the minute crack as a starting point. At present, when the scribe roller 9 is bent to cut a curve, a cutter mark becomes large, and a large crack is easily formed starting from the mark, so that it is difficult to cut a desired curve. Even more, it is impossible to cut a clean curve. Accordingly, only a straight line can be cut substantially, and the corner portion of each substrate remains sharp and sharp at right angles to the cut straight line. The sharp and sharp corners are concentrated in the vertical and horizontal stresses at the time of cutting, making the material more brittle. Therefore, the corners of the sharply pointed shape may have cracks or cracks in the corners of the substrate due to the impact received during the subsequent transporting work in assembling the electro-optical device or when using the electro-optical device. There is a difficulty that is easily generated. If a crack occurs in the assembling process, the other part will be damaged by the broken pieces, resulting in a significant decrease in production yield. Further, if cracks or cracks occur during use of the electro-optical device, the product life is shortened, resulting in a loss of reliability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to prevent cracks and cracks from occurring at corners of a substrate.

[0019]

According to the present invention, the shape of the corner portion of the substrate is formed so as to have a radius of curvature (r), thereby preventing the corner portion of the substrate from being cracked or cracked. . By making the corners round, it is possible to eliminate the concentration of stress and reduce the chance of receiving an impact. Laser cutting is used for cutting the liquid crystal panel. By laser cutting, it is possible to cut a fine curve having an arbitrary radius of curvature (r), and it has an effect that the cut surface becomes smooth and residual stress is reduced.

[0020]

First, laser cutting used in the manufacturing method of the present invention will be described.

The laser beam spot is a light spot having an extremely high energy density. When a laser beam spot is irradiated on the glass substrate surface, a large compressive stress is locally generated on the glass substrate surface. At the same time as heating with the laser beam spot, local cooling of the heated part using an appropriate refrigerant induces tensile stress, penetrates to the material part in the compressed state, and cracks when the stress exceeds the material strength. appear. By performing this operation at a predetermined position on the surface of the glass substrate, the glass substrate can be cut into an arbitrary shape. In order to cut the glass substrate, the glass substrate material must first be heated, and the laser beam must be opaque to the glass substrate material. For this reason, the wavelength of the laser beam used for cutting the glass usually has a wavelength in the infrared region exceeding 2 μm. From this point of view, glass cutting generally uses a CO ₂ laser having a wavelength of about 10.6 μm. In addition, a YAG laser can be used. Generally, nitrogen gas is used as the refrigerant. The optimum values of the shape and size of the laser beam spot, the output density of the laser, the supply speed of the coolant, and the like may be appropriately selected in consideration of the material, thickness, and cutting speed of the glass substrate material to be cut.

In order to cut a material into a pattern including a curve by laser cutting, the work stage on which the material to be cut is placed and the position of the laser spot are controlled by a so-called numerical control (N
C) It can be performed by relatively moving using means. That is, the XY coordinates are set on the work stage, the cutting pattern is determined in advance by the XY coordinates, and stored in the control device. Next, the work stage and the position of the laser spot may be relatively moved in accordance with the XY coordinates.

In the case of laser cutting, curved cutting is possible, and stress is generated only in a very small area, so that no crack is left on the fractured surface. This has the effect of suppressing the occurrence of cracks from cracks.

FIG. 18 shows a comparison of the surface roughness of the cut surface obtained by the conventional scribing method and the laser cutting. FIG. 18A shows the case where the substrate thickness is 0.7 mm by the conventional scribe method, and FIGS. 18B and 18C show the case where the substrate thickness is 0.7 mm by laser cutting. FIG.
Is approximately at the center of the cut surface using a contact type surface roughness meter.
The height at which the stylus touches when scanning by 5 mm is shown. The Ra value indicating the surface roughness is about 5 μm in the conventional scribing method, but is 1 μm or less in the laser cutting, which indicates that the cut surface is very smooth. Since the cut surface is smooth, the residual stress is small and it is difficult to crack.

Next, the radius of curvature (r) provided at the corner of the liquid crystal panel will be described.

Now, in order to determine the optimum value of the radius of curvature (r), a drop test was performed using a liquid crystal panel having a size of 42 mm × 36 mm as shown in FIG. The radius of curvature (r) was variously changed, r was added to all corners of the liquid crystal panel, and the rate of occurrence of cracks in the corners when dropped from a height of 1 m was examined. When a crack occurred even at one location, it was counted as crack occurrence. The thickness of the glass substrate used for the tested liquid crystal panel was 0.7 mm and 0.4 mm. The measurement results are shown in FIGS. 19A and 19B, respectively. As is clear from FIGS. 19A and 19B, when the radius of curvature (r) of the corner portion increases, the rate of occurrence of cracks rapidly decreases, but the radius of curvature at which the occurrence of cracks decreases ( It can be seen that r) depends on the thickness of the glass substrate. That is, when the glass substrate thickness is 0.7 mm,
When the radius of curvature (r) is larger than 0.35 mm, the rate of occurrence of cracks becomes extremely low. When the glass substrate has a thickness of 0.4 mm, if the radius of curvature (r) is larger than 0.2 mm, the rate of occurrence of cracks becomes extremely low.
That is, the curvature radius (r: mm) is equal to the thickness (t:
mm) or more.

As the radius of curvature (r) is further increased and the drop test is continued, the rate of occurrence of cracks at the corners converges to 3%. This is because the glass substrate is essentially a brittle material, and the occurrence of cracks due to a drop impact cannot be eliminated at all. On the other hand, if the radius of curvature (r) is too large, the rate of occurrence of cracks in the corners is reduced, but the corners must be cut off greatly, which is disadvantageous in panel design. Therefore, the upper limit of the radius of curvature (r) is preferably set to 4 mm.

From the above results, the thickness of the glass substrate was set to t
(Mm), and when the radius of curvature of the corner portion is rmm, the appropriate range of the radius of curvature (r) is t / 2 ≦ r ≦ 4 (1).

As described in detail above, the corner portion of the liquid crystal panel is cut into a shape having a radius of curvature (r) using laser cutting, but the cutting order is not particularly limited. Using the numerical control function of the laser cutting device, a large liquid crystal panel base material may be cut into a shape having a radius of curvature (r) at once, or a large liquid crystal panel base material may be cut into a strip-shaped medium liquid crystal panel first. It is also possible to cut the base material, sequentially cut it into smaller pieces to obtain a liquid crystal panel base material of a predetermined size, and finally cut the corners into curves. Needless to say, the present invention can be applied to a case where one liquid crystal panel is obtained from one liquid crystal panel base material.

The cutting of the curve at the corner may be performed before the sealing of the electro-optical material, or may be performed after the sealing.

In the above description, a liquid crystal panel has been described as an example. However, the present invention is not limited to a liquid crystal panel, but can be applied to an electroluminescence panel, a plasma display, and the like.

Next, an example of an embodiment of the present invention will be described with reference to a liquid crystal panel used in a liquid crystal device which is one of the electro-optical devices according to the present invention.

First, a large liquid crystal panel base material 1 shown in FIG.
6, an example in which four liquid crystal panels 11 of the present invention shown in FIG. 5 are manufactured will be described. This embodiment has dealt with the case where a liquid crystal panel having an MIM structure is manufactured. A liquid crystal device is obtained by attaching auxiliary elements such as a liquid crystal driving circuit, a lighting device, and a support to the liquid crystal panel. Further, necessary auxiliary components are mounted to obtain an electro-optical device as a final product.

The liquid crystal panel 11 has a pair of translucent substrates 1a and 1b which are adhered to each other by a sealing material 2. 1a is an element substrate for mounting the MIM element, and 1b is a counter substrate facing the element substrate 1a. Liquid crystal 3, which is an electro-optical material, is sealed between the element substrate 1a and the counter substrate 1b.

In order to obtain such a liquid crystal panel 11, a pair of large-area translucent element substrate preforms 51a and opposing substrate preforms 51b are first prepared in FIG. These light-transmitting substrate base materials have a thickness of, for example, 0.4 mm.
mm transparent glass is used. One element substrate base material 5
1a is a substrate base material for forming the element substrate 1a of the liquid crystal panel 11, and the base material includes a plurality (four in this embodiment) of liquid crystal substrate regions 4a. The other counter substrate base material 51b is the counter substrate 1 of the liquid crystal panel 11.
This is a substrate base material for forming b, and the base material also includes a plurality of liquid crystal substrate regions 4b.

On the element substrate base material 51a, a plurality of linear wirings 12 are arranged in parallel with each other on the inner surface of each liquid crystal substrate region 4a, and an MIM element 13 as a non-linear resistance element is interposed between the wirings 12. Then, an indium tin oxide (hereinafter, referred to as ITO) film is formed thereon by sputtering corresponding to each of the MIM elements 13, thereby forming a translucent pixel electrode 14.

Next, an alignment film is formed on the entire liquid crystal substrate region 4a, and the sealing material 2 is printed in a ring shape around the liquid crystal substrate region 4a by a screen printing method. A part of the annular sealing material is used as an opening 2a and serves as a liquid crystal injection port.

On the other hand, for the counter substrate base material 51b, a color filter is formed on the inner surface of each liquid crystal substrate region 4b by using a known film forming means. Next, an ITO film is formed thereon by sputtering, and further patterned by photolithography to form a stripe-shaped light-transmitting electrode. Further, an alignment film is formed on the translucent electrode.

After performing the above-described processing on each substrate preform, bead-shaped spacers are dispersed on the electrode surface of one of the substrate preforms, and the electrode surfaces of both substrate preforms 51a and 51b are opposed to each other. In this manner, the base materials of the two substrates are overlapped with each other and bonded. Thus, the liquid crystal panel base material 16 having a large area as shown in FIG. 2 is formed.

Thereafter, the liquid crystal panel base material 16 thus formed is set on a cutting stage of a laser cutting device (not shown), and the liquid crystal panel base material 16 is subjected to laser cutting.

The laser cutting apparatus uses a CO ₂ laser, and uses nitrogen gas as a refrigerant. The laser cutting apparatus can appropriately adjust the output of the laser, the shape and size of the spot, the spraying position and the spraying amount of the coolant, according to the material, thickness, cutting speed, and the like of the substrate base material. The cutting pattern has XY coordinates on the cutting stage, the cutting pattern is stored in advance in the apparatus as X and Y coordinates, and the relative position between the cutting stage and the laser spot is determined by a so-called numerical control method. By doing so, it is also possible to automatically cut into arbitrary patterns.

The liquid crystal panel preform 16 shown in FIG. 2 is set at a predetermined position on the cutting stage with the opposing substrate preform 51b facing upward, and then a cutting line along the periphery of the liquid crystal substrate region 4 in FIG. Cut straight along Y1. The cutting line Y1 increases the output of the laser and cuts the two opposing substrate preforms 51b and two element substrate preforms 51a simultaneously. Next, the output of the laser is reduced, and only one opposing substrate base material 51b is cut straight along the cutting line Y2 in FIG. As a result, the large-sized liquid crystal panel base material 16 shown in FIG. 2 becomes the two medium-sized liquid crystal panel base materials 17 shown in FIG. At this time, the cutting line Y2 is formed so as to cross each liquid crystal injection port 2a. Liquid crystal inlet 2
If the liquid crystal substance is injected by a known means at the stage of the medium-sized liquid crystal panel base material 17 in which a is connected, the working efficiency is good and it is convenient. In FIG. 2, reference numeral 18 denotes a portion to be removed as a scrap.

Next, the medium-sized liquid crystal panel base material 17 obtained above is inverted and set at a predetermined position on the cutting processing stage with the element substrate base material 51a facing upward, and along the cutting line Z1 in FIG. Cut straight. The cutting line Z1 is the element substrate base material 51a.
Then, two sheets of the counter substrate base material 51b are cut at the same time. Next, only one element substrate base material 51a is cut straight along the cutting line Z2 in FIG. As a result, the two medium-sized liquid crystal panel preforms 17 shown in FIG. 3 become the two liquid crystal panel preforms 19 of a predetermined size shown in FIG.
The four large-sized liquid crystal panel base materials 19 shown in FIG. 4 are obtained from the large-sized liquid crystal panel base materials 16.

Finally, as shown in FIG. 4, the corner portions (1a-1 to 1a-4 and 1b-1 to 1b-4) of the base material 19 of each liquid crystal panel have a curve R having a radius of curvature (r) of 0.30 mm as shown in FIG. The liquid crystal panel 11 of the present invention shown in FIG. For all curve cutting, the control system of the laser cutting device requires that the shape of each corner be r =
This is performed by storing the cutting pattern so as to have a radius of curvature of 0.30 mm. The liquid crystal panel 11 obtained in this way has a smooth cut surface, no sharp sharp corners at the corners, is strong in impact, and the corners may be broken during transportation in the subsequent assembly process of the electro-optical device. In addition, it can withstand considerable impact even when the electro-optical device is used.

In the case of the manufacturing method of this embodiment,
The cutting process can be performed collectively for each cutting portion, which is suitable for mass production.

Next, as another embodiment, the liquid crystal panel base material 16 having one substrate region shown in FIG.
An embodiment in manufacturing one liquid crystal panel 11 will be described. The liquid crystal panel base material 16 has the same MIM structure as described above. The thickness of the glass substrate was 0.7 mm.

First, cutting is performed along a cutting line Y3 on the outer periphery of the liquid crystal display portion 5 of the liquid crystal panel base material 16 shown in FIG. The cutting along the cutting line Y3 cuts the substrate base materials 51a and 51b by two.
Cut simultaneously. Also, the corner portions 1b-1 and 1
For b-2 (1a-1 and 1a-2 at the same time), two quarter circles are set in advance in the cutting line Y3 so that the radius of curvature (r) is 0.5 mm. It was stored as a cutting pattern. As described above, in the present embodiment, three sides of the liquid crystal panel base material 16 are continuously cut at once. As a result, the liquid crystal panel base material 16 has two corner portions (1b-1 and 1b-2) as shown in FIG.
Has a smooth shape having a radius of curvature of 0.5 mm.

Next, the output of the laser is reduced, and only one substrate base material 1b is cut along the cutting line Y4 in FIG. The cutting pattern was set so that the corner portions 1b-3 and 1b-4 of the cutting line Z3 also had a radius of curvature of 0.5 mm. As a result of the cutting, as shown in FIG. 8, the end material 18 is removed from the substrate preform 1b to form a liquid crystal panel preform 19. Finally, the corner portions (1a-3 and 1a-
4) is set so that the radius of curvature (r) is 0.5 mm, and the corners are cut off. After the above cutting process, all the corner portions as shown in FIG.
A liquid crystal panel 11 having a radius of curvature (r) of mm is obtained.

In the case of the manufacturing method according to this embodiment,
By using automatic control, three sides can be cut at a stroke, and the necessity of changing the cutting member to the processing stage is reduced, so that there is an effect that the number of working steps can be reduced.

In this embodiment, an example is shown in which a straight line is cut into strips and then each corner is cut in a curved line, and a straight line portion and a curved line are cut at once using the control function of a laser cutting machine. Any cutting method may be used. Further, in this embodiment, an example in which all (eight) corner portions of the two substrate base materials are cut with a curve is shown, but the corner portions where the curve is cut are not necessarily limited to all corner portions. Naturally, it is preferable to have many corner portions for performing a curved cut.However, in the case where a terminal portion or the like is formed on a substrate, the corner portions are reinforced as a result, and conversely, a cut portion may not be secured. It is.

In this embodiment, the liquid crystal display panel having the MIM structure is exemplified. However, the liquid crystal display system is not limited to the MIM structure, and may be a simple matrix type or an active matrix type liquid crystal display system, for example, a TFT type liquid crystal display system. Is also applicable. Further, in this embodiment, the liquid crystal panel has been described, but the present invention is not limited to the liquid crystal panel, but can be used for an electroluminescence panel, a plasma display, and the like.

Next, electronic equipment using the liquid crystal panel of the present invention will be described.

FIG. 10 shows an example of an electronic apparatus using the liquid crystal panel of the present invention as a display device.

FIG. 10A is a perspective view showing an example of a portable telephone. 1000 indicates a mobile phone body, of which 10
01 is a liquid crystal panel of the present invention.

FIG. 10B is a perspective view showing an example of a wristwatch-type electronic device. Reference numeral 1100 denotes a watch main body 1101
Is the liquid crystal panel of the present invention. Even in electronic devices that are susceptible to shock during use, such as mobile phones and watches, the use of the liquid crystal panel of the present invention makes it difficult for cracks and cracks to occur in the liquid crystal display portion, making it possible to use electronic devices with excellent shock resistance. Become.

FIG. 10C is a perspective view showing an example of a portable information processing device such as a word processor or a personal computer. 120 in the figure
0 denotes an information processing apparatus, 1202 denotes an input unit such as a keyboard, 1204 denotes an information processing apparatus main body, and 1206 denotes a liquid crystal panel of the present invention. If the liquid crystal panel of the present invention is used, the liquid crystal panel can sufficiently withstand the shock during movement.

FIG. 11 shows an example of a projector (projection display device) using the liquid crystal panel of the present invention as a light modulation device as another example of electronic equipment.

The projector of this embodiment has a light source section 110 and an integrator lens 1 arranged along the system optical axis L.
20, a polarization illuminating device 100 schematically constituted by a conversion conversion element 130, a polarizing beam splitter 200 for reflecting an S-polarized light beam emitted from the polarized light illuminating device 100 by an S-polarized light beam reflecting surface 201, and a polarizing beam splitter 200
A dichroic mirror 412 that separates a blue light (B) component of the light reflected from the S-polarized light reflecting surface 201
A reflection type liquid crystal light modulator 300B that modulates the separated blue light (B) into blue light, and a dichroic mirror 413 that reflects and separates the red light (R) component of the light flux after the blue light is separated. , A reflective liquid crystal light modulator 300R for modulating the separated red light (R), a reflective liquid crystal light modulator 300G for modulating the remaining green light (G) passing through the dichroic mirror 413, and three reflective liquid crystal lights. The light modulated by the modulation devices 300B, 300R, and 300G is combined by the dichroic mirrors 412 and 413 and the polarization beam splitter 200, and the combined light is screen 600
The projection optical system 500 includes a projection lens that projects light to The above three reflective liquid crystal light modulators 300
The liquid crystal panel of the present invention is used for each of R, 300G, and 300B. By using the liquid crystal panel of the present invention, the liquid crystal panel can withstand an impact during transportation in the mounting process, and the occurrence of product defects can be suppressed.

[0059]

According to the present invention, cracking or chipping of the corner portion of the liquid crystal panel is less likely to occur, so that the production yield is improved. In addition, since generation of fragments due to cracks in the corners is eliminated, generation of scratches in the manufacturing process can be suppressed, and the manufacturing yield is further improved. Further, an electronic device using the liquid crystal display panel according to the present invention is a device having excellent impact resistance, a long life, and high reliability.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining one step of a method for manufacturing a liquid crystal panel of the present invention.

FIG. 2 is a perspective view for explaining another step of the method for manufacturing a liquid crystal panel of the present invention.

FIG. 3 is a perspective view for explaining yet another step of the method for manufacturing a liquid crystal panel of the present invention.

FIG. 4 is a perspective view for explaining yet another step of the method for manufacturing a liquid crystal panel of the present invention.

FIG. 5 is a diagram showing an example of the liquid crystal panel of the present invention.

FIG. 6 is a perspective view for explaining one step of a method of manufacturing a liquid crystal panel according to another embodiment of the present invention.

FIG. 7 is a perspective view for explaining another step of the method for manufacturing the liquid crystal panel of another embodiment of the present invention.

FIG. 8 is a perspective view for explaining still another step of the method for manufacturing a liquid crystal panel of another embodiment of the present invention.

FIG. 9 is a diagram showing another example of the liquid crystal panel of the present invention.

FIG. 10 is a diagram illustrating an example of an electronic apparatus using the electro-optical device according to the invention.

FIG. 11 is a diagram illustrating another example of an electronic apparatus using the electro-optical device according to the invention.

FIG. 12 is a diagram illustrating an example of a conventional liquid crystal panel.

FIG. 13 is a perspective view for explaining one step of a conventional liquid crystal panel manufacturing method.

FIG. 14 is an explanatory view showing an example of a cutting device of a conventional liquid crystal panel manufacturing method.

FIG. 15 is a perspective view for explaining one step of another manufacturing method of the conventional liquid crystal panel.

FIG. 16 is a perspective view for explaining another step of another manufacturing method of the conventional liquid crystal panel.

FIG. 17 is a perspective view for explaining still another step of another manufacturing method of the conventional liquid crystal panel.

FIG. 18 is a diagram showing the surface roughness of a cut surface.

FIG. 19 is a diagram showing a relationship between a radius of curvature of a corner portion and a crack occurrence rate.

[Explanation of symbols]

1a: element substrate, 1b: counter substrate, 2: sealing material,
3 ... liquid crystal, 4 ... liquid crystal substrate area, 5 ... display area, 7 ...
Linear groove forming device, 8: pressing device, 9: scribe roller, 11: liquid crystal panel, 12: wiring, 13: M
IM element, 14 ... pixel electrode, 15 ... terminal part, 16 ...
・ Liquid crystal panel base material (large), 17 ・ ・ ・ Liquid crystal panel base material (medium size), 18 ・ ・ ・ Remnants, 19 ・ ・ ・ Liquid crystal panel base material, 21 ・ ・ ・
Elevating drive device, 22: linear moving device, 23: machine frame, 2
4 Lifting device, 26 Presser, 51a Element substrate preform, 51b Counter substrate preform, 52 Processing stage, 54 Linear groove, 1000 ..Mobile phone, 1100 ..
・ Watch, 1200 ・ ・ ・ Notebook PC, 100 ・ ・ ・ Polarized illumination device, 200 ・ ・ ・ Polarized beam splitter, 300 ・ ・ ・
Liquid crystal light modulator, 412 ... dichroic mirror, 5
00: condenser lens, 600: screen

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H088 EA14 EA15 EA16 EA18 EA19 FA06 FA07 FA10 FA11 FA15 FA16 FA17 FA19 FA27 FA30 HA08 HA13 HA21 HA25 HA28 KA01 MA16 2H090 JA09 JA11 JA13 JA13 JB02 JC14 JC17 JC18 JD13 LA03 LA04 LA04 LA20 5G435 AA04 BB01 BB12 BB16 BB17 FF05 GG02 GG04 GG23 GG28 GG46

Claims (8)

[Claims] 1. An electro-optical device having an electro-optical material between two substrates facing each other, wherein at least one corner of the two substrates has a radius of curvature (r). Electro-optical device. 2. The electro-optical device according to claim 1, wherein the radius of curvature (r) is in a range of か ら to 4 mm of the thickness of the substrate. 3. The electro-optical device according to claim 1, wherein the electro-optical device includes a liquid crystal device. 4. A step of bonding a pair of substrate preforms so as to face each other, a step of enclosing an electro-optical material between two opposing substrate preforms, In a method for manufacturing an electro-optical device including a step of cutting a substrate preform along an outer peripheral edge of a substrate region, a step of cutting at least one corner portion of two substrate preforms with a radius of curvature (r) A method for manufacturing an electro-optical device, comprising: 5. A step of bonding a pair of substrate base materials each including a plurality of substrate regions so as to face each other, and applying an electro-optical material between the pair of the plurality of substrate regions that have come to face each other. In a method for manufacturing an electro-optical device, the method includes a step of enclosing and a step of cutting the substrate preform along the outer peripheral edge of the individual substrate region with respect to the pair of substrate preforms. A step of cutting a corner portion with a radius of curvature (r). 6. An electro-optical device according to claim 4, wherein the radius of curvature (r) of the corner portion is in the range of か ら to 4 mm of the thickness of the substrate. Method. 7. The method for manufacturing an electro-optical device according to claim 4, wherein the cutting method is a method using laser cutting. 8. An electronic apparatus comprising the electro-optical device according to claim 1. Description: