JP2003302633A - Mask, substrate with light reflecting film, method for manufacturing light reflecting film, liquid crystal display device and electronic appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mask for manufacturing a light reflecting film with little generation of interference fringes and to provide a light reflecting film by using the mask, a method for manufacturing the light reflecting film, an optical display device having a light reflecting film with little generation of interference fringes, and an electronic appliance having a light reflecting film with little generation of interference fringes. <P>SOLUTION: The mask for the manufacture of a substrate with a light reflecting film has a light transmitting part or a non-transmitting part arranged at random in the plane direction covering 100 to 2,000 RGB dots or the entire screen as a single unit. The mask is used to produce a substrate with a light reflecting film having a plurality of projections or recesses arranged at random in the plane direction covering 100 to 2,000 RGB dots or the entire screen as a single unit. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mask, a substrate with a light reflecting film, a method for manufacturing the light reflecting film, and an optical display device.
And electronic devices. More specifically, a mask for producing a light-reflecting film with less generation of interference fringes, a substrate with a light-reflecting film using the same, a method for producing a light-reflecting film, and a light-reflecting film with less occurrence of interference fringes are provided. Equipped optical display device,
In addition, the electronic device is provided with a light reflection film with less generation of interference fringes.

[0002]

2. Description of the Related Art As is well known, a liquid crystal display device is widely used as a display device in various electronic devices because of its thinness and power saving. Such a liquid crystal display device generally has a configuration in which liquid crystal is sealed between a pair of glass substrates or the like and the periphery thereof is adhered by a sealing material. Then, in order to protect the liquid crystal display device from an external impact, an electronic device equipped with such a liquid crystal display device has an observation side (that is,
On the side of the observer who visually recognizes the display), a protective plate is provided. Such a protective plate is usually a plate-shaped member made of a light-transmissive material (for example, transparent plastic).

However, it is difficult to make the surface of such a protective plate facing the liquid crystal display device a perfectly smooth surface, and in many cases fine irregularities are present. And when such a protective plate is arranged in a liquid crystal display device,
There is a problem that the display quality is remarkably deteriorated due to the fine irregularities on the surface. One of the causes of such deterioration in display quality is that the distance between the viewing-side substrate and the protective plate in the liquid crystal display device varies depending on the unevenness present on the surface of the protective plate. That is, in response to such variations in the spacing, interference occurs when the light emitted from the liquid crystal display device passes through the protective plate, and as a result, interference fringes occur. Then, it is estimated that the generated interference fringes overlap with the display image, which causes deterioration of display quality.

Further, Japanese Patent Laid-Open No. 6-27481 discloses that
As shown in FIG. 25, a reflection type liquid crystal display device 180 is disclosed, and in JP-A-11-281972, FIG.
As shown in FIG. 2, a reflection / transmission dual-use mold 500 is disclosed, and a plurality of uneven structures 404a and 404b (504a and 504b) having different heights are provided in order to reduce the generation of interference fringes, and a polymer resin is provided thereon. A film 405 (505) is formed, and a continuous wavy reflection electrode 409 is further formed thereon.
(509) is formed. Further, a manufacturing process of a liquid crystal display device having such a reflective electrode is disclosed, for example, it is disclosed in FIG. First, as shown in FIG. 27A, a resist film 602 is entirely formed on a glass substrate 600, and then, as shown in FIG. 27B, a pattern 604 composed of a plurality of circles having different diameters is formed. Through,
Expose. After that, development is performed as shown in FIG.
Plural angled convex portions or concave portions 606a, 606a, 6 having different heights
27b, and further, as shown in FIG. 27D, heating is performed to soften the corners of the protrusions or recesses to form the protrusions or recesses 608a, 608b having the corners dropped. And
As shown in FIG. 27E, the space 610
After filling a predetermined amount of the polymer resin 620 into a continuous layer having a wavy surface, a continuous wavy reflection electrode 624 is further formed on the polymer resin film 620 by a laminating means such as a sputtering method. To do.

[0005]

However, in the reflective liquid crystal display device and the reflective / transmissive liquid crystal display device disclosed in Japanese Patent Laid-Open No. 6-27481, a plurality of circles having different diameters are regularly or Although it is intended to provide a plurality of uneven structures with different heights by using ultraviolet exposure and development using a mask that is irregularly arranged, there is variation in coating thickness, etc. It was difficult to precisely adjust the height so that it can be effectively prevented. Also,
Since the reflective electrode is formed on a plurality of concave-convex structures having different heights, problems such as disconnection and easy short-circuiting have been observed. Further, the disclosed method for producing a light-reflecting film has many manufacturing steps and many management items, which is a problem in production. Therefore, in the light reflecting film disclosed in JP-A-6-27481, it is difficult to effectively prevent the generation of interference fringes, and the light reflecting film is
It was difficult to manufacture stably and efficiently.

Therefore, it is considered that a mask in which light transmitting portions or light non-transmitting portions are randomly arranged is prepared and the mask is used to manufacture the reflective liquid crystal display device or the reflective / transmissive liquid crystal display device. However, although the occurrence of interference fringes is reduced, this time, an irregular spot pattern appears on the screen,
There was a new problem that the display quality was significantly reduced. Therefore, the inventors of the present invention have diligently studied the above problems, and as a result, randomly provide a plurality of convex portions or concave portions on the base material in the light reflecting film, and specifically arrange the plurality of convex portions or concave portions. As a result, when used in a liquid crystal display device, etc., while suppressing the development of an irregular spot pattern,
It was discovered that a light reflecting film with less generation of interference fringes can be obtained. That is, the present invention is a mask that can obtain a substrate with a light-reflecting film with less occurrence of interference fringes while suppressing the development of an irregular spot pattern, a substrate with a light-reflecting film obtained from such a mask, and such a Light reflection film manufacturing method, and liquid crystal display device provided with such a light reflection film,
Another object is to provide an electronic device having such a light reflecting film.

[0007]

According to the present invention, there is provided a mask for producing a substrate with a light reflecting film, wherein the RGB dots 100 to 2,000 or the entire screen is a unit.
A mask in which light transmitting portions or light non-transmitting portions are randomly arranged in the plane direction is provided, and the above-mentioned problems can be solved. That is, since the light transmitting portions or the light non-transmitting portions are randomly arranged in the plane direction, when a substrate with a light reflecting film is manufactured, an excellent light scattering effect is exhibited, and the generation of interference fringes is effectively performed. Can be prevented. On the other hand, the irregular spot pattern generated in such a random arrangement is used for the R
By using a predetermined unit of GB dots or more as a basic unit, it is possible to significantly reduce the size. The reason for controlling the planar shape of the light transmitting portion or the light non-transmitting portion is that the photosensitive resin forming the base material of the light reflecting film is photolyzed at the portion irradiated with the light transmitted through the light transmitting portion. This is because there are a positive type which is solubilized in the developer and a negative type which is insolubilized in the developer because a portion irradiated with light transmitted through the light transmitting portion is exposed.

Further, in constructing the mask of the present invention, a random pattern of the light transmitting portion or the light non-transmitting portion in which the RGB dots 3 to 12 are formed as one unit is divided, or arranged randomly as it is. It is preferable that a light transmitting portion or a light non-transmitting portion in which the RGB dots 100 to 2,000 or the entire screen is a unit is configured. With this configuration, a mask having a relatively large amount of information regarding the pattern of the light transmitting portion or the light non-transmitting portion can be designed easily and in a short time.

Further, in constructing the mask of the present invention, a band-shaped random pattern is formed in the light transmission part or the light non-transmission part in the horizontal one-row direction or the vertical one-row direction, and the band-shaped random pattern is repeated in a plurality of rows. Is preferred. With this configuration, it is possible to easily and quickly design a random pattern having a preferable reflection characteristic as a whole with a small amount of information. Further, since the random pattern of a predetermined unit is repeated in the horizontal direction or the vertical direction, it is possible to obtain a random pattern having preferable reflective properties as a whole with good reproducibility.

Further, in constructing the mask of the present invention, it is preferable that the diameter of the light transmitting portion or the light non-transmitting portion is set to a value within the range of 3 to 15 μm. With such a configuration, it is possible to efficiently manufacture a substrate with a light reflection film in which the occurrence of interference fringes is small. That is, when a substrate with a light-reflecting film is manufactured, if the protrusions or recesses have such a diameter, the planar shape and arrangement pattern thereof can be accurately controlled by using an exposure process. is there.
Therefore, since light can be stably scattered in the obtained substrate with a light reflection film, it is possible to effectively prevent generation of interference fringes.

Further, in constructing the mask of the present invention, it is preferable that the diameter of the light transmitting portion or the light non-transmitting portion is made different and a plurality of kinds of light transmitting portions or light non-transmitting portions are provided. With this configuration, it is possible to more efficiently manufacture the substrate with the light reflection film, in which the occurrence of interference fringes is small. That is, when a substrate with a light-reflecting film is manufactured, a plurality of convex portions or concave portions having different diameters are present, so that the arrangement of the plurality of convex portions or concave portions becomes more dispersed. Therefore, since light can be appropriately scattered in the obtained substrate with a light reflection film, the generation of interference fringes can be prevented more effectively. When the diameters of the light transmitting portion and the light non-transmitting portion are made different, it is preferable that at least one diameter is set to a value of 5 μm or more. On the other hand, when each of the circles or polygons is less than 5 μm, when the substrate with a light reflecting film is manufactured, light is often scattered excessively, and the amount of light reflected by the substrate with a light reflecting film is significantly reduced. Because there is.

Another aspect of the present invention is a substrate with a light-reflecting film including a base material and a reflective layer, wherein a plurality of convex portions or concave portions formed on the base material are provided with RGB dots 100 to 100.
It is a substrate with a light-reflecting film, which is randomly arranged in the plane direction with 2,000 or the entire screen as one unit. As described above, by randomly arranging the plurality of convex portions or concave portions in the planar direction, it is possible to effectively prevent the generation of interference fringes. In addition, a random pattern composed of a plurality of convex portions or concave portions has RGB dots 100 to 2,0.
00 or the entire screen as one unit, it is possible to reduce the occurrence of an irregular spot pattern.

Further, in constructing the mask of the present invention, a light-transmitting portion or a light-impermeable portion is formed into a strip-shaped random pattern in the horizontal single row direction or the vertical single row direction, and the strip-shaped random pattern is repeated in a plurality of rows. Is preferred. With this configuration, it is possible to easily and quickly design a random pattern having a preferable reflection characteristic as a whole with a small amount of information. Further, since the random pattern of a predetermined unit is repeated in the horizontal direction or the vertical direction, it is possible to obtain a random pattern having preferable reflective properties as a whole with good reproducibility.

Further, in forming the substrate with a light reflecting film of the present invention, it is preferable that the diameter of the plurality of convex portions or concave portions is set to a value within the range of 3 to 15 μm. With such a configuration, the planar shape and the arrangement pattern of the convex portions or the concave portions can be accurately controlled by using the exposure process, and the light can be appropriately scattered,
It is possible to effectively prevent the occurrence of interference fringes.

In forming the substrate with a light reflecting film of the present invention, the height of the plurality of convex portions or the depth of the concave portions is set to 0.1.
It is preferable to set the value within the range of 10 μm. With this configuration, it is possible to accurately control the planar shape and the arrangement pattern of the convex portions or the concave portions by using the exposure process. In addition, when used in a liquid crystal display device or the like, light can be appropriately scattered, so that the occurrence of interference fringes can be effectively prevented.

Further, in constructing the substrate with a light reflecting film of the present invention, it is preferable that a plurality of convex portions or concave portions have different diameters and a plurality of types of convex portions or concave portions are provided. With such a configuration, when used in a liquid crystal display device or the like, the arrangement of the plurality of convex portions or concave portions is more dispersed, and light can be appropriately scattered, so that the occurrence of interference fringes is further reduced. It can be effectively prevented.

In forming the substrate with a light-reflecting film of the present invention, the base material sequentially includes a first base material and a second base material from below, and the first base material has a plurality of protrusions. It is preferable that the reflective layer is provided on the second base material that is a continuous layer, which is provided with a part or a recess. With this configuration, the reflective layer can have a comparatively gentle curved surface through the second base material that is a continuous layer, and therefore, when used in a liquid crystal display device or the like, interference fringes The occurrence can be prevented more effectively.

Another aspect of the present invention is a method for producing a substrate with a light reflecting film, which comprises a base material and a reflecting layer, wherein RG
By using a mask in which light transmissive portions or light non-transmissive portions are randomly arranged in the plane direction with B dots 100 to 2,000 or the entire screen as one unit, the applied photosensitive resin is exposed by an exposure process. Forming a first base material having a plurality of convex portions or concave portions arranged at random,
A step of applying a photosensitive resin to the surface of the first base material to form a second base material having a plurality of continuous protrusions or recesses by an exposure process, and the surface of the second base material And a step of forming a reflecting layer on the substrate. By carrying out in this way, the reflective layer can be made into a comparatively gentle curved surface through the first base material composed of a plurality of convex portions or concave portions and the second base material which is a continuous layer thereon. . Therefore, it is possible to efficiently provide a substrate with a light-reflecting film that is easy to manufacture and has less generation of interference fringes when used in a liquid crystal display device or the like.

Still another aspect of the present invention is an optical display comprising an optical element sandwiched between substrates, and a light reflection film provided on the substrate opposite to the observation side of the optical element. In the device, the light reflecting film is composed of a base material and a reflective layer, and the plurality of convex portions or concave portions formed on the base material are R.
The optical display device is characterized in that the GB dots 100 to 2,000 or the entire screen are arranged as one unit at random in the plane direction. With such a configuration, the light reflection film appropriately scatters light, and it is possible to effectively prevent the occurrence of interference fringes in the optical display device. In addition, a random pattern composed of a plurality of convex portions or concave portions,
Since the RGB dots 100 to 2,000 or the entire screen is set as one unit, it is possible to reduce the occurrence of an irregular spot pattern.

In constructing the optical display device of the present invention, it is preferable that a light-scattering film is provided on the substrate on the observation side of the optical element. By using the light reflecting film in combination with the light scattering film as described above, it is possible to effectively suppress the appearance of an irregular spot pattern.

In constructing the optical display device of the present invention, it is preferable that a protective plate is provided on the observation side of the optical display device. With this configuration, the mechanical strength of the optical display device can be increased and the appearance of the optical display device can be improved.

Still another aspect of the present invention is an electronic apparatus including an optical display device having a light reflecting film, wherein the light reflecting film includes a base material and a reflective layer, and is formed on the base material. The plurality of convex portions or concave portions are RGB dots 100 to 2,0
00 or the entire screen as one unit, which is randomly arranged in the plane direction. With such a configuration, the light reflecting film appropriately scatters light, and in an electronic device, it is possible to effectively prevent the occurrence of interference fringes while suppressing the occurrence of an irregular spot pattern.
In addition, if it is an electronic device including such a light reflecting film,
Even if the surface is relatively flat and a light scattering film and a protective plate are further combined, the appearance can be improved.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Needless to say,
The embodiments described below show one aspect of the present invention, and do not limit the present invention at all, and can be arbitrarily changed within the scope of the technical idea of the present invention.

First Embodiment In the first embodiment, for example,
A mask 10 for manufacturing a substrate with a light-reflecting film as shown in FIG. 1, wherein the light transmitting portion or the light non-transmitting portion is the RGB dots 100 to 2,000 or the entire screen as one unit.
The mask is characterized by being randomly arranged in the plane direction. The random arrangement of the light transmitting portions or the light non-transmitting portions means that the light transmitting portions or the light non-transmitting portions are randomly arranged, but more accurately, the mask. When the masks are divided into unit areas and these masks are overlapped, each pattern is completely different, or there is a part that partially overlaps,
It means a state where they do not completely match.

1. Light-transmitting part or light-impermeable part (1) The light-transmitting part or light-impermeable part of the shape mask is an independent or partially overlapping circle (including an ellipse. The same applies hereinafter) and / or a polygon. It is preferable that one of them has a planar shape. The reason for this is that by making the plane shape of the light transmitting portion or the light non-transmitting portion into a circle or a polygon in this way, when the exposure process is carried out to manufacture the light reflecting film, the uneven arrangement of the resin becomes complicated. This is because it can be done. Further, since the circle and the polygon are basic figures, the mask itself can be easily manufactured. In addition, preferable polygons include quadrangle, pentagon, hexagon, octagon and the like.

(2) Diameter and Distance The diameter of the light transmitting portion or the light non-transmitting portion in the mask is set to 3
It is preferable to set the value within the range of ˜15 μm. The reason for this is that if the diameter of the light transmitting portion or the light non-transmitting portion is less than 3 μm, even if an exposure process is used in manufacturing the light reflecting film, the planar shape and arrangement pattern of the convex portions or concave portions can be accurately determined. This is because it may be difficult to control. Further, if the diameter of the light transmitting portion or the light non-transmitting portion is less than 3 μm, it may be difficult to manufacture the mask itself. On the other hand, when the diameter of the light transmitting portion or the light non-transmitting portion exceeds 15 μm, it becomes difficult to appropriately scatter light in the obtained light reflecting film light, and the scattering characteristic deteriorates to cause dark reflection. Therefore, the diameter of the light transmitting portion or the light non-transmitting portion of the mask is more preferably set to a value within the range of 5 to 13 μm, and further preferably set to a value within the range of 6 to 12 μm.

Further, it is preferable that the diameter of at least one of the light transmitting portion and the light non-transmitting portion in the mask is set to a value of 5 μm or more. That is, when there is a light transmitting portion or a light non-transmitting portion having a different diameter, the diameter of at least one light transmitting portion or the light non-transmitting portion is set to a value of 5 μm or more, and other light having a different diameter is used. The diameter of the transmissive portion or the light non-transmissive portion may be less than 5 μm. The reason for this is that if the planar shape of the light transmitting portion or the light non-transmitting portion is a circle or a polygon of less than 5 μm, the resulting light reflecting film often scatters light excessively, resulting in dark reflection. Becomes However, if the diameter of the light transmitting portion or the light non-transmitting portion becomes excessively large, the light scattering effect may decrease, and interference fringes may occur.

Further, when the light transmitting portion or the light non-transmitting portion in the mask is arranged independently, the interval (pitch) is set to 3.
A value within the range of 5 to 30 μm is preferable. The reason for this is that the distance between the light transmitting portions or the light non-transmitting portions is 3.5.
This is because if the value is less than μm, the independence of the light transmitting portion or the light non-transmitting portion may decrease. On the other hand, if the distance between the light transmitting portions or the light non-transmitting portions exceeds 30 μm, the random disposition property of the light transmitting portions or the light non-transmitting portions may deteriorate. Therefore, it is more preferable to set the distance (pitch) between the light transmitting portions or the light non-transmitting portions in the mask to a value within the range of 5 to 20 μm, and the distance (pitch) between the light transmitting portions or the light non-transmitting portions in the mask is 7 It is more preferable to set the value within the range of ˜15 μm. The distance between the light transmitting portions or the light non-transmitting portions is the distance from the center to the center of the adjacent light transmitting portions or the light non-transmitting portions, and is 10
It is the average value of more than one place. When the light transmitting portions or the light non-transmitting portions of the mask are made to overlap with each other, the value is set to be a few μm lower than the above numerical value.

(3) Types It is preferable to provide 2 to 10 types of light transmitting portions or light non-transmitting portions by changing the diameters of the light transmitting portions or the light non-transmitting portions in the mask. The reason for this is that the presence of such light transmitting portions or light non-transmitting portions having different diameters makes it possible to more efficiently manufacture the light reflecting film with less occurrence of interference fringes. That is, when the light reflecting film is manufactured using such a mask, the resulting array of convex portions or concave portions is more dispersed, and light can be scattered appropriately. Therefore, when such a light reflection film is used in a liquid crystal display device or the like, it is possible to more effectively prevent the occurrence of interference fringes.

As a combination of patterns consisting of light transmitting portions or light non-transmitting portions having different diameters in the mask,
The following examples can be given. 1) Combination of 7.5 μm hexagonal pattern and 9 μm hexagonal pattern 2) Combination of 5 μm hexagonal pattern, 7.5 μm hexagonal pattern and 9 μm hexagonal pattern 3) 4.5 μm The combination of the square pattern of 5 μm, the square pattern of 5 μm, the hexagonal pattern of 7.5 μm, the hexagonal pattern of 9 μm, and the hexagonal pattern of 11 μm is preferable.

(4) Area ratio Further, the area ratio of the light transmitting portion or the light non-transmitting portion of the mask is
The value is preferably within the range of 10 to 60% with respect to the entire area. The reason is that the area ratio is 10%
When the value is less than, when the light-reflecting film is manufactured, the occupied area of the plurality of convex portions or concave portions becomes small and the flat portion increases,
This is because the light scattering effect may be significantly reduced. On the other hand, even if the area ratio exceeds 60%, the flat portion may increase and the light scattering effect may be significantly reduced. Therefore, it is more preferable to set the area ratio of the light transmitting portion or the light non-transmitting portion of the mask to a value within the range of 15 to 50% with respect to the entire area, and a value within the range of 20 to 40%. Is more preferable. As the photosensitive resin constituting the base material, when a positive type is used, the portion irradiated with the light transmitted through the light transmitting portion is photolyzed and solubilized in the developer, The area ratio of the light opaque part of the mask becomes a problem, and when the negative type is used, the part irradiated with the light transmitted through the light transmissive part is photocured and becomes insoluble in the developer. The area ratio of the light-transmitting part of the above becomes a problem.

2. Random Array (1) Random Array 1 In the first embodiment, as shown in FIG. 1, with the RGB dots 100 to 2,000 or the entire screen as one unit, the light transmitting portion or the light non-transmitting portion is randomly arranged in the plane direction. It is characterized by being arranged in. The reason is that R in such a unit is
This is because when the number of GB dots is less than 100 dots, an irregular spot pattern is often noticeable when a light reflecting film is formed and used in a liquid crystal display device or the like. In addition, the number of RGB dots in one unit is 100.
This is because if the number is less than the number of dots, suppression of interference fringes may be insufficient. However, when the number of RGB dots in one unit exceeds 2,000, the information amount of the random pattern becomes excessively large, which may make it difficult to create a mask. Therefore, it is more preferable that the light transmitting portions or the light non-transmitting portions are randomly arranged in the plane direction with the RGB dots 300 to 1,500 as one unit. It is further preferable that the transmissive portions or the light non-transmissive portions are randomly arranged in the plane direction.

Here, referring to Table 1 below, the number of RGB dots in one unit, the disposition of the light transmitting portion or the light non-transmitting portion of the mask, and the light reflecting film obtained therefrom are used for the liquid crystal display device. The relationship between the occurrence of interference fringes when used for the above and the visibility of the spot pattern under the same conditions will be described. That is, Table 1
Indicates the number of RGB dots in one unit in the left column from 1 to 1166.
Up to four are taken. Among them, the occurrence of the interference fringes of the liquid crystal display device and the visibility of the stain pattern are classified into the case where the light transmitting portions or the light non-transmitting portions are randomly arranged and the case where they are arranged regularly. This is the result of relative evaluation. From this result, the condition that the number of RGB dots in one unit is relatively large, for example,
It can be understood that by randomly arranging the light transmitting portions or the light non-transmitting portions in 192 to 11664, the generation of interference fringes can be relatively suppressed and the visibility of the stain pattern is also reduced. Also, RGB in one unit
When the number of dots is relatively small, for example, in 1 to 48, when the light transmitting portions or the light non-transmitting portions are randomly arranged, the effect of suppressing the generation of interference fringes is slightly reduced,
It can be understood that the spot pattern may become noticeable in some cases. On the other hand, when the light transmitting portions or the light non-transmitting portions are arranged regularly, not only the number of RGB dots in one unit but the appearance of the stain pattern is not visible, but the occurrence of interference fringes is remarkable. Is understood. Therefore, in order to suppress the occurrence of interference fringes and also reduce the visibility of the stain pattern, for example, the RGB dots 100 to
It can be said that it is effective to randomly arrange the light transmitting portions or the light non-transmitting portions with 2,000 as one unit in the plane direction.

[0034]

[Table 1]

(2) Random array 2 In constructing the mask of the present invention, FIGS.
As shown in FIG. 3, the random pattern of the light transmission part or the light non-transmission part in which the RGB dots 3 to 12 that are created in advance as one unit are divided or randomly arranged as they are, and R
It is preferable that the GB dots 100 to 2,000 or the light transmissive portion or the light non-transmissive portion with the entire screen as one unit is configured. With this configuration, the amount of information regarding the pattern of the light transmitting portion or the light non-transmitting portion can be reduced, and by repeating the random pattern of the RGB dots 3 to 12, a large-area mask can be easily and shortly formed. Can be designed in time. When a random pattern of a light transmitting portion or a light non-transmitting portion with RGB dots 3 to 12 as one unit as shown in FIGS. 2 to 4 is divided, it may be divided appropriately, or It may be divided under a condition in which the arbitrary condition is removed by using a random function or the like.

(3) Random Arrangement 3 Further, in constructing the mask of the present invention, as shown in FIG. 5, the light transmitting portions or the light non-transmitting portions 244 are formed into a striped random pattern in the horizontal single row direction or the vertical single row direction. It is preferable to form and repeat the strip-shaped random pattern in a plurality of rows. With such a configuration, in one of the horizontal single-column direction or the vertical single-column direction, one band-shaped random pattern is formed, and by repeating it as appropriate, the occurrence of interference fringes due to the light reflecting film is generated. This is because it can be effectively prevented. Further, with this configuration, it is possible to easily design a random pattern having a preferable reflection characteristic as a whole in a short time with a small amount of information. For example, a mask for a 17-inch LCD panel in the horizontal direction,
1 / n (n is a natural number in the range of 2 to 1000) is evenly divided, and in the mask in the horizontal single row direction, the light transmitting portion or the light non-transmitting portion is assigned by a random function, and if repeated n times, It is possible to effectively prevent the occurrence of interference fringes. Further, by repeating the random pattern of the predetermined unit in the horizontal direction or the vertical direction in this way, it is possible to obtain a random pattern having a preferable reflection characteristic as a whole with good reproducibility.

[Second Embodiment] As shown in FIG. 6, the second embodiment shows the case where a negative photosensitive resin is used as an example, but includes a base material 77 and a reflective layer 72. In the substrate 70 with a light reflection film, the plurality of convex portions 76 formed on the base material 77 are randomly arranged in the plane direction with the RGB dots 100 to 2,000 or the entire screen as one unit. This is a substrate 70 with a light reflecting film.

1. As the structure of the base material, as shown in FIG. 6, a first base material 76 and a second base material 79 are sequentially included from the lower side, and
It is preferable that the base material 76 is composed of a plurality of independent or partially overlapped convex portions, and the second base material 79 is a continuous layer. With this structure, the reflective layer 72 formed on the second base material 79, which is a continuous layer, can be formed into a comparatively gentle curved surface with few flat portions, and thus the liquid crystal is formed. When used for display devices,
This is because the generation of interference fringes can be effectively prevented. Further, in the case of a plurality of convex portions or concave portions formed on a base material, when the base material includes a first base material and a second base material, usually, a plurality of convex portions or Means a recess. Hereinafter, as a preferred example, as shown in FIG.
The case where the base material 77 is composed of the first base material 76 and the second base material 79 from below will be described as an example.

(1) First Base Material It is preferable that the height of the plurality of convex portions or the depth of the plurality of concave portions in the first base material is set to a value within the range of 0.5 to 5 μm. The reason for this is that the height of the convex portion or the depth of the concave portion is 0.5 μm.
This is because if the value is less than m, it may be difficult to provide the reflective layer having an appropriate curved surface via the second base material. On the other hand, the height of the convex portion or the depth of the concave portion is 5
This is because if the thickness exceeds μm, the unevenness of the reflective layer becomes large, which may cause excessive scattering of light or easy disconnection. Therefore, it is more preferable to set the height of the plurality of protrusions or the depth of the plurality of recesses in the first substrate to a value within the range of 0.8 to 4 μm, and preferably a value within the range of 1 to 3 μm. More preferable.

(2) Second Base Material It is preferable that the height of the continuous convex portions or the depth of the concave portions of the second base material is set to a value within the range of 0.1 to 3 μm.
This is because the height of the convex portion or the depth of the concave portion is 0.1.
This is because if the value is less than μm, it may be difficult to provide a reflective layer having an appropriate curved surface thereon. On the other hand, if the height of the convex portion or the depth of the concave portion exceeds 3 μm, the irregularities of the reflecting layer formed thereon may become large, and light may be excessively scattered or easily broken. This is because. Therefore, the height of the plurality of protrusions or the depth of the recesses in the second base material is set to 0.1 to 2 μm.
It is more preferable to set the value within the range of m, and it is 0.3 to 2
It is more preferable to set the value within the range of μm.

(3) Random array of a plurality of convex portions or concave portions 1 The plurality of convex portions or concave portions formed on the surface of the base material, in particular, the plurality of convex portions or concave portions constituting the first base material, are used as the RGB dots 10.
It is characterized in that 0 to 2,000 or the entire screen is taken as one unit and arranged randomly in the plane direction. The reason for this is
If all the convex portions or concave portions are regularly arranged,
When used in liquid crystal display devices, interference fringes occur,
This is because the image quality is significantly reduced. Further, when randomly arranging a plurality of convex portions or concave portions in a predetermined unit of RGB dots in the plane direction, if the RGB dot unit has a value of less than 100 dots, an irregular stain is generated when used in a liquid crystal display device or the like. This is because the pattern is clearly recognized.
Therefore, it is more preferable that the light transmissive portions or the light non-transmissive portions are randomly arranged in the plane direction with the RGB dots 300 to 1,500 as one unit.
It is more preferable that the light transmitting portions or the light non-transmitting portions are randomly arranged in the plane direction with 0 to 1,200 dots as one unit.

Further, it is preferable that the heights of the plurality of convex portions or the depths of the concave portions are substantially equal to each other. The reason for this is as follows: JP-A-6-27481 and JP-A-11-281.
As described in Japanese Patent No. 972, conversely, if the heights of the plurality of convex portions or the depths of the concave portions are made different, manufacturing becomes difficult and it is not possible to stably suppress the generation of interference fringes. .

Planar shapes of convex portions or concave portions Further, regarding the planar shapes of a plurality of convex portions or concave portions formed on the base material, independent or partially overlapped circles and polygons,
Alternatively, it is preferable that either one of them has a planar shape. The reason for this is that the independent and partially overlapped circles and polygons, or any one of them has a planar shape so that the planar shape and the arrangement pattern of the plurality of convex portions or concave portions are
This is because accurate control can be performed using the exposure process. Further, it is because such a plane-shaped convex portion or concave portion can scatter light and effectively prevent the generation of interference fringes. Further, as a preferable example of the planar shape of the convex portion or the concave portion, an offset elliptical shape (droplet shape) as shown in FIG. 7A or an offset quadrangle (pyramid type) as shown in FIG. 7B. Alternatively, as a preferable example of the planar shape of the recess, FIGS.
The elliptical dome shape and the oval dome shape shown in FIG. The reason is that the planar shape of the plurality of protrusions or recesses is
This is because such an asymmetrical flat shape improves the light directivity while maintaining a predetermined light scattering property, as shown in FIG. 8, in combination with the slope in the height direction. In FIG. 8, the dot-dash line a shows the amount of light that is visible when the ellipse is offset as shown in FIG. 7A, and the solid line b is the amount of light that is seen when the circle is a uniform circle that is not offset. Is shown. Therefore, when viewed from a certain direction by using such an asymmetrical planar shape,
For example, the amount of light entering the eye increases at a position where the angle is + 15 °, and a bright image can be recognized at that position.

Diameter of convex portion or concave portion Further, regarding a plurality of convex portions or concave portions formed on the substrate,
It is preferable to set the diameter of the convex portion or the concave portion to a value within the range of 3 to 15 μm. The reason for this is that if there are a plurality of protrusions or recesses having a diameter in such a range, the planar shape and arrangement pattern can be accurately controlled using the exposure process, and light can be scattered appropriately to cause interference. This is because the occurrence of stripes can be effectively prevented. In addition, if there are a plurality of convex portions or concave portions having a diameter in such a range, an irregular spot pattern is less likely to be observed. Therefore, it is more preferable that the diameters of the plurality of protrusions or recesses be within the range of 5 to 13 μm, and even more preferably within the range of 6 to 12 μm. Further, it is preferable that the plurality of convex portions or concave portions have different diameters, and, for example, 2 to 10 types of convex portions or concave portions are provided. This is because such a configuration enables complicated light reflection that cannot be obtained by one type of convex portion or concave portion, and allows light to be dispersed and scattered. Therefore, by providing a plurality of convex portions or concave portions having different diameters, it is possible to more effectively prevent the occurrence of interference fringes.

Height of convex portion or depth of concave portion With respect to the plurality of convex portions or concave portions formed on the substrate,
The height of the convex portion or the depth of the concave portion is preferably set to a value within the range of 0.1 to 10 μm. The reason for this is that if the height of the convex portion or the depth of the concave portion is a value less than 0.1 μm, the unevenness may be reduced and the scattering characteristics may be deteriorated even if an exposure process is used. On the other hand, when the height of the convex portion or the depth of the concave portion exceeds 10 μm, the irregularities of the reflective layer become large, and light may be excessively scattered or easily broken. Therefore, the height of the convex portion or the depth of the concave portion is more preferably set to a value within the range of 0.2 to 3 μm, and further preferably set to a value within the range of 0.3 to 2 μm.

(4) Opening The light reflecting film is preferably provided with an opening for partially passing light. With this configuration, it can be used in a reflective / transmissive liquid crystal display device and the like. That is, as shown in FIG. 9, by providing the opening 102 in a part of the light reflection film 100, the light reflection film 100 can efficiently reflect the light from the outside and the light emitted from the inside. Light can also be effectively emitted to the outside through the opening 102. The size of the opening is not particularly limited and is preferably determined depending on the application of the light reflecting film. For example, when the total area of the light reflecting film is 100%, it is 5 to 80. The value is preferably in the range of%, more preferably in the range of 10 to 70%, and even more preferably in the range of 20 to 60%.

2. Reflective Layer (1) Thickness The thickness of the reflective layer in the light reflective film is preferably set to a value within the range of 0.05 to 5 μm. The reason for this is that if the thickness of the reflective layer is less than 0.05 μm, the reflective effect may be significantly poor. On the other hand, if the thickness of the reflective layer exceeds 5 μm, the flexibility of the obtained light reflective film may be deteriorated or the manufacturing time may be excessively long. Therefore, the thickness of the reflective layer is more preferably set to a value within the range of 0.07 to 1 μm, and further preferably set to a value within the range of 0.1 to 0.3 μm.

(2) Types The constituent material of the reflective layer is not particularly limited,
For example, aluminum (Al), silver (Ag), copper (C
u), gold (Au), chromium (Cr), tantalum (W), nickel (Ni), and the like are preferably metal materials having excellent conductivity and light reflectivity. It is also preferable to use a transparent conductive material such as indium tin oxide (ITO), indium oxide, or tin oxide on the reflective layer. However, when such a metal material or a transparent conductive material is used, if there is melting into the liquid crystal, an electric insulating film may be provided on the surface of the reflective film made of the metal material, or the like, together with the metal material, It is also preferable to sputter an electric insulator.

(3) Underlayer Further, in forming the reflective layer on the second substrate, in order to improve the adhesion and to form the reflective layer into a gently curved surface, the thickness is 0.01 to 2 μm. It is preferable to provide an underlayer. In addition, as a constituent material of such an underlayer, a silane coupling agent, a titanium coupling agent, an aluminum coupling agent, an aluminum-magnesium alloy, an aluminum-silane alloy, an aluminum-copper alloy, an aluminum-manganese alloy, an aluminum-gold. The alloys may be used alone or in combination of two or more.

(4) Specular reflectance Further, it is preferable to set the specular reflectance of the reflective layer to a value within the range of 5 to 50%. The reason for this is that if the specular reflectance is less than 5%, the brightness of the obtained display image may be significantly reduced when used in a liquid crystal display device or the like. On the other hand, the specular reflectance is 50
If it exceeds%, the scattering property will decrease and the background reflection and
This is because the external light may be excessively specularly reflected. Therefore, the specular reflectance of the reflective layer is more preferably set to a value within the range of 10 to 40%, further preferably set to a value within the range of 15 to 30%.

3. Combination with other constituent members The above-described light reflecting film is combined with another constituent member, for example, as shown in FIGS. 13 and 14, a color filter 150, a light shielding layer 151, an overcoat layer 157, a plurality of transparent electrodes 1.
It is preferable to combine 54 with an alignment film or the like. By combining in this way, it is possible to efficiently provide a member such as a color liquid crystal display device in which interference fringes are less likely to occur. For example, by combining the color filters 150 such as a stripe array, a mosaic array, or a delta array configured by three color elements of RGB (red, blue, green), colorization can be easily achieved, and the light shielding layer 151 can be further provided. By combining with, it is possible to obtain an image with excellent contrast. Further, although the light reflecting film can be used as a reflecting electrode, by providing another electrode, for example, the transparent electrode 154, the influence of the reflecting film composed of a plurality of convex portions or concave portions is eliminated while preventing light absorption. can do. Further, it is also preferable to form a color filter with three color elements of YMC (yellow, magenta, cyan), which is excellent in light transmission characteristics.
When used as a reflection type liquid crystal display device, a brighter display can be obtained.

[Third Embodiment] A third embodiment is a method of manufacturing a light-reflecting film including a base material and a reflecting layer, wherein the RGB dots 100 to 2,000 or the entire screen is used as one unit.
Using a mask in which light transmitting portions or light non-transmitting portions are randomly arranged in a plane direction, a plurality of convex portions or concave portions randomly arranged in a plane direction by an exposure process is applied to a photosensitive resin applied. Forming a first base material, and applying a photosensitive resin to the surface of the first base material to form a second base material having a plurality of continuous convex portions or concave portions by an exposure process. A method of manufacturing a light-reflecting film, comprising: a forming step; and a step of forming a reflective layer on the surface of the second base material. Hereinafter, the manufacturing method of the light reflecting film (substrate with the light reflecting film) will be specifically described with reference to FIGS. 10 and 11 and taking as an example the case where the recess is formed on the surface of the first base material. To do. In addition, in FIG.
11 is a schematic view of the manufacturing process of the light reflecting film,
Is a flow chart for it.

1. Step of forming the first base material A plurality of convex portions or concave portions randomly arranged in the plane direction are formed from a photosensitive resin by an exposure process using the mask described in the first embodiment. Is preferred. That is, the light transmitting portion or the light non-transmitting portion is independent,
Alternatively, a plurality of convex portions or concave portions that are randomly arranged in the plane direction are exposed through a mask that has a partially overlapped circle and / or a polygon, or has a plane shape that is randomly arranged in the plane direction. It is preferable that it is made of a positive resin, for example, a positive photosensitive resin.

(1) Photosensitive resin The type of the photosensitive resin constituting the first base material is not particularly limited, but for example, acrylic resin, epoxy resin, silicone resin, phenol resin, Examples of the oxetane resin include one kind alone or a combination of two or more kinds. In addition, silica particles, in the photosensitive resin, can be accurately formed into a predetermined circle or polygon.
It is also preferable to add an inorganic filler such as titanium oxide, zirconia oxide, or aluminum oxide. As described above, the photosensitive resin forming the first base material is a positive type resin in which a portion irradiated with the light transmitted through the light transmitting portion is photodegraded and solubilized in the developer. There is a negative type in which a part irradiated with light transmitted through the light transmitting part is hardened and becomes insoluble in a developer, but any of them can be preferably used.

(2) Exposure process As shown in step P31 of FIG. 10A and FIG.
In forming the first base material 112, a photosensitive resin forming the first base material is uniformly applied on the support 114 using a spin coater or the like to form the first layer 110. Is preferred. In that case, as the spin coater condition, for example, at a rotation speed of 600 to 2,000 rpm, 5
It is preferably set to -20 seconds. Then, in order to improve the resolution, as shown in step P32 of FIG.
It is preferred to pre-bake layer 110. In that case,
For example, using a hot plate, 80-120 ℃, 1
It is preferable to set heating conditions for 10 minutes. Then, as shown in Step P33 of FIG. 10B and FIG. 11, the mask 119 of the first embodiment is used and randomly arranged in the plane direction by the exposure process method to be independent or partially overlap. It is preferable to form the first base material 112 including a plurality of convex portions or concave portions. That is, the first layer 110 made of the photosensitive resin applied uniformly is coated on the first layer 110.
After placing the mask 119 of the above embodiment, it is preferable to expose the i-line or the like. In that case, it is preferable to set the exposure amount of the i-line or the like to a value within a range of 50 to 300 mJ / cm ² , for example.

Next, as shown in step P34 of FIG. 10C and FIG. 11, a plurality of convexes which are randomly arranged in the plane direction and are independent or partially overlap by being positively developed with a developing solution. First consisting of a part or a recess
The base material 112 can be formed. Before forming the second base material 113, as an example, as shown in Step P35 of FIG. 11, after the entire surface is post-exposed so that the exposure amount is 300 mJ / cm ² , the temperature is set to 220 ° C. and 50 ° C. It is also preferable to post-bake by heating under the condition of minutes to further strengthen the first base material 112.

2. Step of forming the second base material In the step of forming the second base material, a continuous layer is formed on the first base material, that is, on the plurality of concave portions randomly arranged in the planar direction by resin coating or the like. Is a step of forming the second base material.

(1) Photosensitive resin The type of the photosensitive resin constituting the second base material is not particularly limited, but for example, acrylic resin, epoxy resin, silicone resin, phenol resin, etc. Is mentioned. Further, since the adhesion between the first base material and the second base material is improved, the photosensitive resin forming the second base material,
It is preferable that the same kind as the photosensitive resin that constitutes the first base material. Since the adhesion between the first base material and the second base material is improved, the surface of the first base material is preferably treated with a silane coupling agent or the like.

(2) Exposure step As shown in steps P37 to P40 of FIG. 10D and FIG. 11, in forming the second base material 113, the photosensitive resin forming the second base material 113 is used. It is preferable to expose the mounting area around the panel display area with an i-line or the like to remove the resin layer after the application. Also in this case, the first base material 1
Similarly to the case of exposing No. 12, it is preferable to set the exposure amount of the i-line or the like to a value within the range of 50 to 300 mJ / cm ² , for example. Furthermore, as shown in steps P41 to P42 of FIG. 11, after forming the second base material 113, as an example,
Post-exposure is performed on the entire surface so that the exposure amount is 300 mJ / cm ^2, and then post-baking is performed by heating at 220 ° C. for 50 minutes, and the first base material 112 and the second base material 112
It is also preferable to further strengthen each of the base materials 113.

3. Step of forming the reflective layer In the step of forming the reflective layer, as shown in Steps P43 to P44 of FIG. This is a step of forming the reflective layer 116 having a smooth curved surface.

(1) Reflective Layer Material As the reflective layer material, as described in the second embodiment, it is preferable to use a metal material having excellent light reflectivity such as aluminum (Al) and silver (Ag). .

(2) Forming Method It is preferable to form the reflecting layer by using a technique such as sputtering. In addition, the reflective layer material other than the desired portion,
It can be removed by a technique such as photoetching. Further, since the surface of the second base material has irregularities, the reflective layer material may not be laminated to have a uniform thickness. In such a case, it is preferable to employ the rotary evaporation method or the rotary sputtering method. Furthermore, while forming a reflection layer, the reflection layer is formed by a TFT (Thin Film Transistor),
It is preferable to electrically connect to a terminal such as MIM (Metal Insulating Metal).

[Fourth Embodiment] In the fourth embodiment, as an active element, a TFD (Thin
A liquid crystal display device of an active matrix system using a film diode, comprising a liquid crystal element sandwiched between substrates,
A substrate with a light reflection film provided on a substrate on the side opposite to the observation side of the liquid crystal element, and the substrate with the light reflection film includes a base material and a reflection layer, and is formed on the base material. The plurality of convex portions or concave portions are provided with RGB dots 100 to 2,000.
Alternatively, the liquid crystal display device is characterized in that the entire screen is set as one unit and arranged randomly. Hereinafter, FIG. 22-
This will be specifically described with reference to FIG. 24, but a semi-transmissive reflective liquid crystal device of a system capable of selectively performing reflective display using external light and transmissive display using an illumination device will be described as an example.

First, also in the present embodiment, the liquid crystal device 23
As shown in FIG. 22, 0 indicates that the first substrate 231a and the second substrate 231b are bonded to each other with a sealing material (not shown), and further, a gap surrounded by the first substrate 231a, the second substrate 231b and the sealing material. That is, it is formed by enclosing the liquid crystal in the cell gap. A liquid crystal driving IC (not shown) is provided on the surface of one substrate 231b.
However, it is preferable to be directly mounted by, for example, a COG (Chip on glass) method. And FIG.
In FIG. 23, some of the plurality of display dots forming the display area of the liquid crystal device 230 are shown in an enlarged scale, and FIG. 23 shows the sectional structure of one display dot portion.

Here, as shown in FIG. 22, the second substrate 2
A plurality of pixel electrodes are formed in a dot matrix arrangement in the row direction XX and the column direction YY in the inner region surrounded by the seal material 31b. In addition, the first substrate 2
A striped electrode is formed in the inner region surrounded by the sealing material 31a, and the striped electrode is the second electrode.
It is arranged so as to face the plurality of pixel electrodes on the substrate 231b side. Further, a portion where the liquid crystal is sandwiched between the stripe-shaped electrode on the first substrate 231a and one pixel electrode on the second substrate 231b forms one display dot, and a plurality of the display dots are surrounded by the sealant. A display area is formed by arranging in a dot matrix shape in the internal area. Further, the liquid crystal driving IC selectively controls the orientation of the liquid crystal for each display dot by selectively applying the scanning signal and the data signal between the counter electrodes in the plurality of display dots. That is, the light passing through the liquid crystal is modulated by controlling the alignment of the liquid crystal, and characters are displayed in the display area.
Images such as numbers are displayed.

Further, in FIG. 23, the first substrate 231a
Is a base material 2 formed of glass, plastic, or the like.
36a, a light reflection film 231 formed on the inner surface of the base material 236a, a color filter 242 formed on the light reflection film 231, and a transparent stripe shape formed on the color filter 242. An electrode 243. The alignment film 24 is formed on the striped electrode 243.
1a is formed. A rubbing process as an alignment process is performed on the alignment film 241a. The striped electrodes 243 are formed of a transparent conductive material such as ITO (Indium Tin Oxide).

The second substrate 231b facing the first substrate 231a is a base material 236b made of glass, plastic or the like and an active element functioning as a switching element formed on the inner surface of the base material 236b. TFD (Thin Film Diode) 247 and a pixel electrode 239 connected to this TFD 247.
The alignment film 24 is formed on the TFD 247 and the pixel electrode 239.
1b is formed, and the alignment film 241b is subjected to a rubbing process as an alignment process. The pixel electrode 239 is
For example, it is formed of a transparent conductive material such as ITO (Indium Tin Oxide).

Further, the color filter 242 belonging to the first substrate 231a has the pixel electrode 239 on the second substrate 231b side.
R (red), G (green), B (blue) or Y at the position facing
It is preferable to have a color filter element 242a of any color such as (yellow), M (magenta), and C (cyan), and to have a black mask 242b at a position not facing the pixel electrode 239.

As shown in FIG. 23, the first substrate 23
The space between 1a and the second substrate 231b, that is, the cell gap, is maintained in size by the spherical spacers 304 dispersed on the surface of one of the substrates, and the liquid crystal is sealed in the cell gap. Here, TFD247 is
As shown in FIG. 23, the first metal layer 244, the insulating layer 246 formed on the surface of the first metal layer 244, and the second metal layer 248 formed on the insulating layer 246 are formed. ing. As described above, the TFD 247 has a laminated structure including the first metal layer / insulating layer / second metal layer, that is, a so-called MIM (Metal Insulator Metal) structure.

The first metal layer 244 is made of, for example, tantalum simple substance, tantalum alloy, or the like. When a tantalum alloy is used as the first metal layer 244, tantalum as a main component is added to groups 6 to 8 in the periodic table such as tungsten, chromium, molybdenum, rhenium, yttrium, lanthanum, and disprolium. The element to which it belongs is added.

The first metal layer 244 is the line wiring 24.
9 of the first layer 249a is integrally formed. The line wiring 249 is formed in a stripe shape with the pixel electrode 239 interposed therebetween, and functions as a scanning line for supplying a scanning signal to the pixel electrode 239 or a data line for supplying a data signal to the pixel electrode 239. In addition, the insulating layer 246 is formed of, for example, tantalum oxide (Ta) formed by oxidizing the surface of the first metal layer 244 by an anodic oxidation method.
₂ O ₅ ). When the first metal layer 244 is anodized, the first layer 24 of the line wiring 249 is
The surface of 9a is also oxidized at the same time to form a second layer 249b also made of tantalum oxide.

The second metal layer 248 is made of a conductive material such as Cr. Pixel electrode 239
Is formed on the surface of the base material 236b so that a part thereof overlaps the tip of the second metal layer 248. The base material 236b
An underlying layer may be formed on the surface of the above with tantalum oxide or the like before forming the first metal layer 244 and the first layer 249a of the line wiring. This is to prevent the first metal layer 244 from being separated from the base by heat treatment after the deposition of the second metal layer 248, and to prevent impurities from diffusing into the first metal layer 244.

The light reflecting film 231 formed on the first substrate 231a is formed of a light reflecting metal such as aluminum, and is located at a position corresponding to each pixel electrode 239 belonging to the second substrate 231b. An opening 241 for transmitting light is formed at a position corresponding to the display dot. Further, on the liquid crystal side surface of the light reflection film 231, for example,
As shown in FIG. 7 and FIGS. 17 to 21, the dome-shaped valleys or ridges 80, 84, 180, 190, 20 having an oval shape.
It is preferable that 0, 210 and 220 are formed. That is, such valleys or peaks 80, 84, 180, 19
It is preferable that 0, 200, 210, and 220 are arranged such that the X-axis direction, which is the extending direction of the line wiring, has a long axis and the Y-axis direction perpendicular to the X-axis direction has a short axis. In addition, valleys or mountains 80, 84, 180, 190, 20
The major axis X of 0, 210, 220 is set parallel to the edge of the base material extending in the XX direction, and the minor axis Y is set parallel to the edge of the base material extending in the YY direction. Preferably.

Since the liquid crystal display device 230 of the fourth embodiment is configured as described above, the liquid crystal display device 230 concerned.
23 performs liquid crystal display, the liquid crystal display device 230 is viewed from the viewer side, that is, the second substrate 231b side in FIG.
Light that has entered the inside of the light passes through the liquid crystal and is reflected by the light reflection film 23.
1 is reached, reflected by the reflective film 231, and supplied again to the liquid crystal (see arrow F1 in FIG. 23). The orientation of the liquid crystal is controlled for each display dot by the voltage applied between the pixel electrode 239 and the stripe-shaped counter electrode 243, that is, the scanning signal and the data signal, whereby the reflected light supplied to the liquid crystal is displayed. It is modulated for each dot, so that an image such as letters and numbers is displayed on the observer side.

On the other hand, when the liquid crystal display device 230 performs a transmissive display, an illuminating device (not shown) arranged outside the first substrate 231a, a so-called backlight, emits light.
This emitted light serves as a polarizing plate 233a, a retardation film 232a, and a base material 2.
36a, the opening 241 of the light reflection film 231, the color filter 242, the electrode 243, and the alignment film 241a, and then is supplied to the liquid crystal (see arrow F2 in FIG. 23). After this,
Display is performed in the same manner as in the case of reflective display.

In the fourth embodiment, a plurality of convex portions or concave portions are formed on the base material of the substrate with the light reflecting film, the RGB dots 100 to 2,000 or the entire screen as one unit.
Since they are randomly arranged in the plane direction, it is possible to reduce the occurrence of interference fringes. Further, in the fourth embodiment, as described above, when the three-dimensional shape along the X-axis and the three-dimensional shape along the Y-axis in the plurality of protrusions or recesses are different from each other, a constant viewing angle direction is obtained. It is possible to increase the amount of reflected light in another specific viewing angle direction while suppressing the amount of reflected light to be low. As a result, the observer
In the reflective display performed using the light reflecting film, the image displayed in the display area of the liquid crystal display device can be observed as a very bright display in a specific viewing angle direction.

[Fifth Embodiment] A fifth embodiment is a liquid crystal including a liquid crystal element sandwiched between substrates and a light-reflecting film provided on the substrate opposite to the viewing side of the liquid crystal element. In the display device, the light-reflecting film is composed of a base material and a reflective layer, and the plurality of convex portions or concave portions formed on the base material,
The liquid crystal display device is characterized in that the RGB dots 100 to 2,000 or the entire screen are randomly arranged in a plane direction. Hereinafter, the passive-matrix reflective liquid crystal display device according to the fifth embodiment will be specifically described with reference to FIG. 13 as appropriate. In each drawing shown below, the scale may be different for each layer and each member in order to make each layer and each member recognizable in the drawing.

1. Configuration As shown in FIG. 13, the liquid crystal display device 140 includes a first substrate 141 and a second substrate 141 which face each other.
The substrate 142 and the substrate 142 are attached to each other via the sealing material 158,
A liquid crystal 144 is enclosed between both substrates. Further, on the observation side of the liquid crystal display device 141, a light-transmitting protective plate 145 is provided. The protection plate 145 is a plate-like member for protecting the liquid crystal display device 140 from an impact given from the outside, and is provided, for example, in a housing of an electronic device in which the liquid crystal display device 140 is mounted. In addition, the protective plate 145 is arranged so as to be close to the substrate surface of the first substrate 141 (observation-side substrate) in the liquid crystal display device 140. In the present embodiment,
The protective plate 145 made of plastic is attached to the first substrate 141.
It is assumed that the surface of the polarizing plate 146 located closest to the observation side among the above components is brought into contact with the surface. In this way the protective plate 1
When 45 is made of plastic, it has the advantage of being easy to mold and can be manufactured at low cost, but on the other hand, fine irregularities are easily formed on the surface.

On the other hand, the first substrate 14 of the liquid crystal display device 140.
The first and second substrates 142 are light-transmissive plate-shaped members made of glass, quartz, plastic, or the like. Of these, the inside of the first substrate 141 located on the observation side (the liquid crystal 144 side)
The surface has a plurality of transparent electrodes 143 extending in a predetermined direction.
Are formed. Each transparent electrode 143 is made of ITO (Indi
um Tin Oxide) is a strip-shaped electrode made of a transparent conductive material. Further, the surface of the first substrate 141 on which these transparent electrodes 143 are formed is covered with an alignment film (not shown). This alignment film is an organic thin film such as polyimide, and is a liquid crystal 144 when no voltage is applied.
Rubbing treatment for defining the orientation direction of the.

2. Outside the light-scattering film first substrate 141 (on the side opposite to the liquid crystal 144),
A polarizing plate 146 that polarizes incident light in a predetermined direction, and a scattering layer 147 that is interposed between the first substrate 141 and the polarizing plate 146.
And are provided. The scattering layer 147 is the scattering layer 14
Polarizing plate 1 is a layer for scattering the light passing through 7.
Adhesive 148a for attaching 46 to the first substrate 141
And a large number of fine particles 1 dispersed in the adhesive 148a.
And 48b. As the scattering layer 147, for example, an acrylic or epoxy adhesive 148a in which fine particles 148b made of silica are dispersed can be used. The refractive index of the adhesive 148a and the refractive index of the fine particles 148b are different, and the scattering layer 147
The light incident on is refracted at the boundary between the adhesive 148a and the fine particles 148b. As a result, the incident light on the scattering layer 147 can be emitted while being appropriately scattered.

Furthermore, the scattering layer 14 in the fifth embodiment.
For No. 7, the number of fine particles 148b dispersed in the adhesive 148a, the refractive index of both of them, and the like are selected so that the haze value (cloudiness value) H is within the range of 10 to 60%.
Here, the haze value H is a value that represents the degree to which light incident on a member is scattered when passing through the member, and is defined by the following formula. Haze value (cloudiness value) H = (Td / Tt) × 100 (%)

Here, Tt is the total light transmittance (%), and Td is the scattered light transmittance (%). Total light transmittance T
t is a value representing the ratio of the amount of light transmitted through the sample to the amount of light incident on the sample for which the haze value H is measured. On the other hand, the scattered light transmittance Td is the ratio of the amount of light emitted in a direction other than the predetermined direction (that is, the scattered light amount) to the amount of light transmitted through the sample when the sample is irradiated with light from the predetermined direction. It is a value to represent. That is, when the ratio of the amount of light emitted from the sample in the direction parallel to the incident light is taken as the parallel light transmittance Tp (%), the scattered light transmittance Td is obtained.
Is represented by the difference (Td = Tt−Tp) between the total light transmittance Tt and the parallel light transmittance Tp. As is clear from the above, when the haze value H is high, the degree of scattering is large (that is, the proportion of the scattered light amount in the transmitted light amount is large), and conversely, when the haze value H is low, the degree of scattering is small (that is, the transmitted light amount). The proportion of the scattered light amount in the
Can be said. Regarding the haze value (haze value) H, JIS (Japanese Industrial Standards) K6714
-1977.

3. Reflecting Layer (Light Reflecting Film) On the other hand, a reflecting layer 149 is formed on the inner surface (on the side of the liquid crystal 144) of the second substrate 142. This reflective layer 149 is
It is a layer for reflecting the light incident on the liquid crystal display device 140 from the observation side, and is formed of a metal having a light reflectivity such as aluminum or silver. Here, as shown in FIG. 13, a region of the inner surface of the second substrate 142, which is covered by the reflective layer 149, is a rough surface on which a large number of fine protrusions and depressions are formed. More specifically, a light reflection film including a base material and a reflective layer,
The heights of the plurality of protrusions or the depths of the recesses formed on the surface of the base material are made substantially equal, and the planar shapes of the plurality of protrusions or recesses are independent or partially overlapped circles and multiple The reflection layer 149 has a prismatic shape or a planar shape of either one and has a plurality of convex portions or concave portions randomly arranged in the planar direction. Therefore, the surface of the reflective layer 149 is a rough surface that reflects the protrusions and depressions on the surface of the second substrate 142. That is, the reflective layer 149 has a scattering structure for appropriately scattering the reflected light on the surface and realizing a wide viewing angle. More specifically, the reflective layer 14
9 is formed on a base material composed of a plurality of protrusions or recesses, and the height of the plurality of protrusions or the depth of the recesses formed on the base material are made substantially equal, and The planar shape of the plurality of protrusions or recesses is an independent or partially overlapping circle and polygon, or any one of the planar shapes, and the plurality of protrusions or recesses are randomly arranged in the plane direction. It has a certain structure.

4. Other Configurations Further, on the surface of the reflective layer 149 covering the second substrate 142, the color filter 150, the light shielding layer 151, and an overcoat for flattening the unevenness formed by the color filter 150 and the light shielding layer 151. A layer 157, a plurality of transparent electrodes 154, and an alignment film (not shown) are formed. Each transparent electrode 154 is a strip-shaped electrode extending in a direction intersecting the extending direction of the transparent electrode 143 on the first substrate 141 (left-right direction on the paper surface in FIG. 13), and like the transparent electrode 143, is made of ITO or the like. It is made of a transparent conductive material. Under such a configuration, the liquid crystal 144 has the transparent electrode 143.
The orientation direction changes according to the voltage applied between the transparent electrode 154 and the transparent electrode 154. That is, the area where the transparent electrode 143 and the transparent electrode 154 intersect functions as a pixel (sub-pixel). The color filter 150 is a resin layer provided corresponding to each of these pixels, and is colored R, G, or B with a dye or a pigment.
In addition, the light shielding layer 151 is a lattice-shaped layer for shielding the gap between the pixels from light, and is formed of, for example, a black resin material in which carbon black is dispersed.

5. Operation The reflective display is realized by the configuration described above. That is, outside light such as sunlight or indoor illumination light is protected by the protective plate 145.
And then enters the liquid crystal display device 140, and the reflective layer 149
Reflected on the surface of. This reflected light is transmitted to the liquid crystal 144 and the first
The liquid crystal display device 140 is transmitted through the substrate 141, is appropriately scattered in the scattering layer 147, and then is transmitted through the polarizing plate 146.
To the observation side. Then, the light emitted from the liquid crystal display device 140 passes through the protective plate 145 and is visually recognized by an observer.

Here, as described above, when plastic is used as the material of the protective plate 145, it is difficult to make the surface of the protective plate 145 completely flat, and a plurality of fine irregularities are likely to be formed. When the protective plate 145 having such fine irregularities is arranged close to the first substrate 141 of the liquid crystal display device 140, when the light emitted from the liquid crystal display device 140 passes through the protective plate 145. As a result, the interference fringes corresponding to the unevenness may overlap the display image, resulting in deterioration of display quality. However, as a result of the test by the present inventor, as shown in the above embodiment, the liquid crystal 14
In the case where the light that passes through 4 and reaches the protective plate 145 is scattered by the scattering layer 147, high-quality display can be realized.

Further, in the structure of the liquid crystal display device shown in FIG. 13, from the viewpoint of suppressing the generation of interference fringes, it is desirable that the haze value H of the scattering layer 147 is high, that is, the degree of scattering is high. However, when the haze value H is set to a too high value (for example, a value of 70% or more),
The light from the liquid crystal display device 140 to the protective plate 145 may be scattered too much, which may cause a new problem that the contrast of the display image is lowered, that is, the display image is blurred. on the other hand,
When the haze value H of the scattering layer 147 is set to a value that is too low, for example, a value of 10% or less, spots due to the unevenness are easily visible.

As a result of the test by the present inventors, the scattering layer 147
When the haze value H is set to a value within the range of 10% to 40%, the deterioration of the display quality due to the unevenness of the surface of the protective plate 145 is avoided while avoiding a significant decrease in the contrast of the display image. Therefore, we have obtained the knowledge that the display quality can be effectively suppressed and a good display quality can be secured. Therefore, it is desirable to set the haze value H of the scattering layer 147 to a value within this range, particularly to a value near 20%.

As shown in the fifth embodiment, the scattering layer 14 in which the fine particles 148b are dispersed in the adhesive 148a.
7 is used, for example, the addition amount (number) of the fine particles 148b
The haze value H can be arbitrarily selected by adjusting. That is, if the amount of the fine particles 148b dispersed in the adhesive 148a is increased, the scattering layer 147 is increased.
Since the incident light on the light is further scattered, the haze value H of the scattering layer 147 can be increased, and conversely, the haze value H of the scattering layer 147 can be decreased by reducing the addition amount of the fine particles. And so on.

According to the fifth embodiment, there is an advantage that the degree of scattering of light emitted from the liquid crystal display device 140 can be easily selected over a wide range. That is, in a liquid crystal display device that does not have the scattering layer 147, in order to adjust the degree of scattering of light emitted from the liquid crystal display device 140, the shape of the surface of the reflective layer 149, for example, the height of the convex portion or the depth of the concave portion is adjusted. It is necessary to adjust the distance between adjacent convex portions (or concave portions) or the like. However, it is not always easy to accurately form the surface of the reflective layer 149 into a desired shape in consideration of the circumstances of the manufacturing technique for forming the desired unevenness on the second substrate 142. Further, only by adjusting the shape of the surface of the reflective layer 149, the width in which the degree of scattering of light emitted from the liquid crystal display device 140 can be adjusted is limited to an extremely narrow range.
On the other hand, according to the present embodiment, even if the shape of the surface of the reflective layer 149 is not significantly changed, by changing the haze value H of the scattering layer 147, for example, the fine particles 148b dispersed in the adhesive 148a. There is an advantage that the degree of scattering of the light emitted from the liquid crystal display device 140 can be easily adjusted over a wide range by appropriately adjusting the addition amount of the.

[Sixth Embodiment] The sixth embodiment is a liquid crystal including a liquid crystal element sandwiched between substrates and a light reflecting film provided on a substrate opposite to the viewing side of the liquid crystal element. In the display device, the light-reflecting film is composed of a base material and a reflective layer, and the plurality of convex portions or concave portions formed on the base material,
It is a passive-matrix transflective liquid crystal display device in which 100 to 2,000 RGB dots or the entire screen are randomly arranged in the plane direction. Therefore, the passive matrix type transflective liquid crystal display device of the sixth embodiment will be specifically described with reference to FIG. Note that among the constituent elements shown in FIG. 14, those common to the constituent elements shown in FIG. 13 above are designated by the same reference numerals, and the description thereof will be omitted.

1. Basic Configuration As shown in FIG. 14, in the sixth embodiment, a backlight unit 153 is provided on the back side (opposite to the observation side) of the liquid crystal display device 160. The backlight unit 153 includes a plurality of LEDs 15 functioning as a light source.
(Only one LED 15 is shown in FIG. 14), a light guide plate 152 for guiding the light from the LED 15 incident on the side end face to the entire surface of the second substrate 142 in the liquid crystal display device 160, and the light guide plate 152. The diffuser plate 155 that uniformly diffuses the light guided by the liquid crystal display device 160, and the reflector plate that reflects the light emitted from the light guide plate 152 to the side opposite to the liquid crystal display device 160 to the liquid crystal display device 160 side. 156 and. Here, the LED 15 is not always lit, and when used in an environment where there is almost no external light, it illuminates according to an instruction from the user or a detection signal from the sensor.

Further, in the liquid crystal display device 160 according to the sixth embodiment, the opening 159 is formed in the region corresponding to the vicinity of the central portion of each pixel in the reflective layer 149.
The outside of the second substrate 142 (the side opposite to the liquid crystal 144)
Another pair of polarizing plates are attached to the sheet, but the polarizing plate is not shown in FIG.

2. According to the liquid crystal display device 160 having such a configuration, a transmissive display can be realized in addition to the reflective display shown in the fifth embodiment. That is, the light emitted from the backlight unit 153 to the liquid crystal display device 160 is
It passes through the opening 159 of the reflective layer 149. This light passes through the liquid crystal 144 and the first substrate 141, and the scattering layer 147.
After being scattered at, the light passes through the polarizing plate 146 and is emitted to the observation side of the liquid crystal display device 160. Then, the emitted light passes through the protective plate 145 and is emitted to the observation side,
The transmissive display is realized. Therefore, also in the present embodiment, as in the fifth embodiment described above, the protective plate 145 having fine irregularities formed on the surface thereof is used as the liquid crystal display device 1.
Even when it is provided close to 60, it is possible to suppress the deterioration of display quality due to the unevenness.

[Seventh Embodiment] A seventh embodiment is a liquid crystal including a liquid crystal element sandwiched between substrates and a light reflection film provided on a substrate opposite to the viewing side of the liquid crystal element. In the display device, the light reflection film includes a base material and a reflective layer, and the plurality of convex portions or concave portions formed on the base material are R
This is a modification of the liquid crystal display device in which the GB dots 100 to 2,000 or the entire screen is taken as one unit and arranged randomly in the plane direction.

(1) Modified Example 1 In each of the above embodiments, the scattering layer 147 is provided on the first substrate 1.
Although the structure is provided between 41 and the polarizing plate 146, the position of the scattering layer 147 is not limited to this. For example, when a retardation plate for compensating the interference color is provided between the polarizing plate 146 and the first substrate 141, the scattering layer 147 may be interposed between the retardation plate and the first substrate 141. Or a scattering layer 147 between the retardation plate and the polarizing plate 146.
May be inserted. In short, the scattering layer 147 is the liquid crystal 144.
On the other hand, the structure provided on the side of the protective plate 145 is sufficient.

Further, in each of the above-mentioned embodiments, the scattering layer 147 having a structure in which a large number of fine particles 148b are dispersed in the adhesive 148a is used, but the structure of the scattering layer 147 is not limited to this, and is incident. Any structure may be used as long as it can scatter light. However, when the scattering layer 147 including the adhesive 148a is used, the members sandwiching the scattering layer 147 (for example, the first substrate 141 and the polarizing plates 146 in each of the above embodiments may be bonded by the adhesive 148a). Therefore, as compared with the case where the scattering layer 147 not containing the adhesive 148a is used, there is an advantage that the manufacturing cost can be reduced and the manufacturing process can be simplified.

(2) Modified Example 2 In the fifth embodiment, the reflective liquid crystal display device and the transflective liquid crystal display device in the sixth embodiment are exemplified, but the reflective layer 149 is not provided and the transmissive liquid crystal display device is used. The present invention can be applied to a transmissive liquid crystal display device that performs only display. That is, in the transmissive liquid crystal display device, the transflective liquid crystal display device shown in FIG. 14 may be configured without the reflective layer 149. In addition, in the fourth embodiment,
Although both the reflective display and the transmissive display are realized by the reflective layer 149 having the opening 159, instead of the reflective layer 149, a part of the irradiated light is transmitted and the other one is transmitted. It goes without saying that the present invention can also be applied to a semi-transmissive reflection type liquid crystal display device using a so-called half mirror that reflects a portion.

(3) Modified Example 3 In each of the above embodiments, the case where a plastic plate member is used as the protective plate 145 has been illustrated. Since irregularities are likely to be formed on the surface of the protective plate 145, the application of the present invention can exert a particularly remarkable effect. However, the material of the protective plate 145 is not limited to this, and plate members made of various other materials may be used as the protective plate 145.
Can be used as

(4) Modified Example 4 In each of the above embodiments, the case where the present invention is applied to a passive matrix type liquid crystal display device has been illustrated.
The present invention is also applicable to an active matrix type liquid crystal display device using a two-terminal switching element represented by FD (Thin Film Diode) and a three-terminal switching element represented by TFT (Thin Film Transistor). Is. Further, in each of the above-described embodiments, the case where the color filter 150 and the light shielding layer 151 are formed on the second substrate 142 is illustrated, but a liquid crystal display device having a configuration in which these elements are formed on the first substrate 141. Or color filter 1
50 or a liquid crystal display device that does not include the light shielding layer 151,
It goes without saying that the present invention is applicable. As described above, the present invention can be applied to the liquid crystal display device 160 having the configuration in which the protective plate 145 is arranged close to the observation side regardless of the aspect of other elements.

(5) Modified Example 5 In the fourth embodiment described above, 2 active elements are used.
Although an active matrix type liquid crystal display device using a TFD which is a terminal type active element has been exemplified, as shown in FIG. 13, an active matrix type liquid crystal using a TFT which is a three terminal type active element as an active element. It may be a display device. In this case, it is preferable to provide a TFT element in the light shielding area as shown in FIG.

[Eighth Embodiment] An eighth embodiment is an electronic apparatus including a liquid crystal display device having a light reflection film, in which the light reflection film includes a base material and a reflection layer, and is formed on the base material. The plurality of convex portions or concave portions formed are the RGB dots 100 to 2,0.
00 or the entire screen as one unit, which is randomly arranged in the plane direction.

(1) Mobile Computer First, an example in which the liquid crystal display device according to the present invention is applied to the display portion of a portable personal computer (so-called notebook personal computer) will be described. Figure 15
FIG. 3 is a perspective view showing the configuration of this personal computer. As shown in FIG.
Reference numeral 1 denotes a main body portion 163 having a keyboard 162, and a display portion 164 using a liquid crystal display device (not shown) according to the present invention.
It has and. The display unit 164 has a housing 166 in which a plastic protective plate 145 is arranged corresponding to the window 165.
In addition, the liquid crystal display device 160 according to the present invention is housed. More specifically, the liquid crystal display device 160 is
So that the substrate surface on the observation side is close to the protective plate 145,
It is housed in a housing 166. In the personal computer 161, the backlight unit 153 is provided on the back side as shown in the seventh embodiment in order to ensure the visibility of the display even under the condition that the external light is not sufficiently present. It is desirable to use the provided transflective liquid crystal display device.

(2) Mobile Phone Next, an example in which the liquid crystal display device according to the present invention is applied to the display portion of a mobile phone will be described. FIG. 16 is a perspective view showing the configuration of this mobile phone. As shown in the figure,
The mobile phone 170 has a plurality of operation buttons 171 as well as
An earpiece 172, a mouthpiece 173, and a display unit 174 using the liquid crystal display device (not shown) according to the present invention are provided. In this mobile phone 170, the liquid crystal display device according to the present invention is housed in a housing 176 in which a plastic protection plate 175 is arranged corresponding to the window 174b. In the mobile phone 170 as well, like the personal computer, the liquid crystal display device is housed in the housing 176 such that the substrate surface on the observation side is close to the protective plate 175.

As the electronic apparatus to which the liquid crystal display device according to the present invention can be applied, in addition to the personal computer shown in FIG. 15 and the mobile phone shown in FIG. 16, a liquid crystal television, a viewfinder type monitor, etc. Direct-view video tape recorder, car navigation system, pager,
Examples include electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, devices equipped with a touch panel, and the like. As described above, according to the liquid crystal display device of the present invention, even when the protective plate having fine irregularities on the surface is arranged in proximity to the substrate surface of the liquid crystal display device, the irregularities are It is possible to suppress the deterioration of display quality due to. Therefore, it is possible to reduce the thickness or size of the electronic device by disposing the protective plate close to the liquid crystal display device without degrading the display quality.

[0106]

As described above, according to the mask of the present invention and the light-reflecting film obtained therefrom, a random pattern is formed with a predetermined number or more of RGB dots as one unit. When used in a display device or the like, it has become possible to effectively suppress the occurrence of interference fringes while suppressing the visual perception of irregular spot patterns. Further, according to the mask of the present invention, since the amount of information can be small, it is possible to obtain a light reflecting film with less occurrence of interference fringes not only in a small liquid crystal display device or the like but also in a large liquid crystal display device or the like. It has become possible to easily and quickly design the masks used.

Further, according to the liquid crystal display device provided with the light reflecting film and the electronic apparatus having the light reflecting film of the present invention, the occurrence of interference fringes is reduced while suppressing the visual sense of the irregular spot pattern. Design and manufacturing have also become easier.
Further, according to the liquid crystal display device provided with the light reflection film of the present invention, and the electronic device having the light reflection film, even when the protective plate having fine irregularities on the surface is disposed in proximity,
It has become possible to suppress deterioration in display quality due to the unevenness.

[Brief description of drawings]

FIG. 1 is a plan view provided for explaining a mask of the present invention.

FIG. 2 is a plan view provided for explaining a mask in which one pixel (RGB: 3 dots) is one unit and light transmissive portions or light non-transmissive portions are randomly arranged in a planar direction.

FIG. 3 is a plan view provided for explaining a mask in which light transmissive portions or light non-transmissive portions are randomly arranged in a plane direction with two pixels (RGB: 6 dots) as one unit.

FIG. 4 is a plan view provided for explaining a mask in which light transmissive portions or light non-transmissive portions are randomly arranged in a plane direction with three pixels (RGB: 12 dots) as one unit.

FIG. 5 is a plan view provided for explaining a mask in which light transmissive portions or light non-transmissive portions are randomly arranged in a plane direction with one horizontal row as one unit.

FIG. 6 is a cross-sectional view of a light reflecting film including a first substrate and a second substrate.

7A and 7B are a plan view and a cross-sectional view of a light reflecting film including an asymmetrical substantially tear-shaped convex portion.

FIG. 8 is a diagram showing a relationship between a visually sensed light amount and a visually recognized angle.

FIG. 9 is a cross-sectional view of a light reflecting film having an opening.

FIG. 10 is a manufacturing process diagram of a light reflecting film.

FIG. 11 is a flowchart of a manufacturing process of a light reflecting film.

FIG. 12 is a cross-sectional view provided for explaining a light reflecting film electrically connected to a TFT element.

FIG. 13 is a cross-sectional view showing a configuration of a passive matrix type liquid crystal display device.

FIG. 14 is a cross-sectional view showing the configuration of another liquid crystal display device.

FIG. 15 is a perspective view showing a configuration of a personal computer which is an example of an electronic device.

FIG. 16 is a perspective view showing a configuration of a mobile phone which is an example of an electronic device.

17A and 17B are a plan view and a cross-sectional view of a substrate with a light-reflecting film which is substantially a conical recess.

FIG. 18 is a plan view and a cross-sectional view of a substrate with a light-reflecting film, which is composed of an asymmetrical substantially tear-shaped concave portion.

FIG. 19 is a plan view and a cross-sectional view of a substrate with a light-reflecting film, which is composed of an asymmetrical substantially pyramidal recess.

20A and 20B are a plan view and a cross-sectional view of a substrate with a light-reflecting film whose substantially horizontal section is a parabola having a small radius of curvature and whose vertical section is a parabolic recess having a larger radius of curvature.

21A and 21B are a plan view and a cross-sectional view of a substrate with a light-reflecting film, which has a substantially horizontal cross section and a rectangular pyramidal recess in the vertical direction.

FIG. 22 is an exploded view of a TFD type liquid crystal display device.

FIG. 23 is a partial cross-sectional view of a TFD type liquid crystal display device.

FIG. 24 is a partial perspective view of a TFD type liquid crystal display device.

FIG. 25 is a cross-sectional view showing a configuration of a conventional liquid crystal display device.

FIG. 26 is a cross-sectional view showing another configuration of the conventional liquid crystal display device.

FIG. 27 is a manufacturing process diagram of a conventional liquid crystal display device.

[Explanation of symbols]

10: Mask 70, 100: light reflecting film 72, 116: reflective layer 76, 112: First base material 79, 113: Second base material 102: opening 140: Liquid crystal display device 141: First substrate (observation-side substrate) 142: Second substrate 143: transparent electrode 144: Liquid crystal 145: Protective plate 146: Polarizing plate 147: Scattering layer 148a: adhesive 148b: Fine particles 149: Reflective layer 150: Color filter 151: Light shielding layer 152: Light guide plate 153: Backlight unit 154: Transparent electrode 155: Diffusion plate 156: reflector 157: Overcoat layer 158: Seal material 159: opening 160: Liquid crystal display device 161: Personal computer (electronic device) 170: Mobile phone (electronic device) 230: Liquid crystal display device 247: TFD

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tadashi Tsuzuki             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 2H042 DA01 DA12 DA14 DC02                 2H091 FA16Y FB03 FB08 FC10                       FD04 GA13 LA18                 2H095 BB02 BB36 BC09

Claims (15)

[Claims] 1. A mask for producing a substrate with a light reflection film, wherein 100 to 2,000 dots or the entire screen is one unit, and light transmitting portions or light non-transmitting portions are randomly arranged in a plane direction. A mask characterized by that. 2. The 100 to 2,000 dots or the random patterns of the light transmitting portion or the light non-transmitting portion in which the RGB dots 3 to 12 which are created in advance as one unit are divided, or randomly arranged as they are. The mask according to claim 1, wherein a light transmitting portion or a light non-transmitting portion is formed with the entire screen as one unit. 3. A strip-shaped random pattern is formed in the light transmissive portion or the light non-transmissive portion in the horizontal single row direction or the vertical single row direction,
The mask according to claim 1, wherein the strip-shaped random pattern is repeated in a plurality of columns. 4. The diameter of the light transmitting portion or the light non-transmitting portion is 3 to.
A value within a range of 15 μm is set.
The mask according to any one of to 3. 5. The light transmissive portion or the light non-transmissive portion having different diameters, and a plurality of types of light transmissive portions or light non-transmissive portions are provided, according to any one of claims 1 to 4. mask of. 6. A substrate with a light-reflecting film including a base material and a reflective layer, wherein a plurality of convex portions or concave portions formed on the surface of the base material are provided in 100 to 2,000 dots or the entire screen. A substrate with a light-reflecting film, which is randomly arranged as a unit in a plane direction. 7. The strip-shaped random pattern is formed by arranging the plurality of convex portions or recesses in a horizontal single-column direction or a vertical single-column direction, and the strip-shaped random pattern is repeated in a plurality of columns. 6. The substrate with a light reflecting film according to 6. 8. The diameter of the plurality of convex portions or concave portions is 3 to 15
The substrate with a light-reflecting film according to claim 6 or 7, wherein the substrate has a value in the range of μm. 9. The substrate with a light-reflecting film according to claim 6, wherein the plurality of convex portions or concave portions have different diameters to provide a plurality of types of convex portions or concave portions. . 10. The base material sequentially includes a first base material and a second base material from the bottom, and the first base material is composed of a plurality of convex portions or concave portions, and a second base material. The substrate with a light-reflecting film according to any one of claims 6 to 9, wherein the substrate comprises a plurality of continuous convex portions or concave portions. 11. A method for producing a light-reflecting film including a base material and a reflecting layer, wherein 100 to 2,000 dots or the entire screen is set as one unit, and the light transmitting portion or the light non-transmitting portion is randomly arranged in a plane direction. Forming a first base material having a plurality of protrusions or recesses on the applied photosensitive resin by an exposure process using an arrayed mask, and forming a first base material on the surface of the first base material. A step of applying a photosensitive resin and forming a second base material having a plurality of continuous convex parts or concave parts by an exposure process, and a step of forming a reflective layer on the surface of the second base material, A method of manufacturing a light-reflecting film, comprising: 12. An optical display device comprising: an optical element sandwiched between substrates; and a light reflection film provided on a substrate opposite to an observation side of the optical element, the light reflection film. Is composed of a base material and a reflection layer, and the plurality of convex portions or concave portions formed on the base material are randomly arranged in the plane direction with 100 to 2,000 dots or the entire screen as one unit. Characteristic optical display device. 13. The optical display device according to claim 12, wherein a light-scattering film is provided on a substrate on the observation side of the optical element. 14. The optical display device according to claim 12, wherein a protective plate is provided on the observation side of the optical display device. 15. An electronic device including an optical display device having a light reflection film, wherein the light reflection film includes a base material and a reflection layer, and the plurality of protrusions or recesses formed on the base material. , 100 to 2,000 dots or the entire screen as one unit, which are randomly arranged in the plane direction.