JP3110652B2 - Microlens substrate and liquid crystal display device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microlens substrate having a microlens array and a lenticular lens formed inside the substrate, and a high-definition liquid crystal display device using the same.

[0002]

2. Description of the Related Art In recent years, the demand for liquid crystal display devices has been increasing not only as direct-view type but also as projection type display devices such as projection televisions. When the liquid crystal display element is used as a projection type, if the enlargement ratio is increased with the conventional number of picture elements, the roughness of the screen becomes conspicuous. In order to obtain a fine image even at a high magnification, it is necessary to increase the number of picture elements.

However, when the number of picture elements of the liquid crystal display element is increased, especially in an active matrix type liquid crystal display element,
The area occupied by parts other than the picture elements becomes relatively large, and the area of the black matrix covering these parts increases. When the area of the black matrix increases, the area of the picture element openings contributing to display decreases, and the aperture ratio of the display element decreases. When the aperture ratio decreases, the screen becomes dark, and the image quality deteriorates.

In order to prevent the aperture ratio from decreasing due to the increase in the number of picture elements, it is proposed to form a microlens array in which a plurality of microlenses are two-dimensionally arranged on one surface of a liquid crystal display device. (Japanese Unexamined Patent Publication No.
165621-165624, JP-A-60-2
62131). By providing a plurality of microlenses corresponding to each picture element, light that has been blocked by the black matrix in the related art can be concentrated in the picture element.

As a method for producing a microlens, an ion exchange method (Appl. Optics, 21 (6) p.1052 (1982), Electron Le
tt., 17 p. 452 (1981)), swelling method (Suzuki et al., “A New Method for Fabricating Plastic Microlenses”, 24th Meeting of the Society for Microoptics), thermal sag method (Zoran D. Popovic et al., Appl. Opti
cs, 27 p.1281 (1988)), and a machining method.

In the ion exchange method, a microlens array having a refractive index distribution type microlens is obtained, and in other methods, a microlens array having a microlens having a convex refractive surface is obtained. In particular, in the case of a microlens array having convex microlenses, a mold is made using the microlens array as a master (original master), and molding is performed using the mold, thereby enabling mass production of the microlens array ( 2P method, see JP-A-5-134103).

[0007] By bonding the microlens array obtained by these methods to a liquid crystal display element,
The effective aperture ratio of the liquid crystal display element is improved, and a bright display screen can be obtained. The effective aperture ratio is a transmittance of a liquid crystal display device excluding a color filter and a polarizing plate.

However, in a liquid crystal display element for a projection television which provides a high-definition display with a picture element pitch of about several tens of μm, the display element has a smaller pitch than a liquid crystal display element with a picture element pitch of about several hundred μm. The opening area is reduced. Since the effective aperture ratio is determined by the relationship between the size of the condensing spot of the microlens and the area of the picture element opening, the condensing of the microlens of the microlens array used for a liquid crystal display element having a picture element pitch of about several tens of μm The size of the spot needs to be smaller than the size of the condensed spot of the microlens of the microlens array used for the liquid crystal display element having a picture element pitch of about several hundred μm. This is because if the size of the condensed spot of the microlens is larger than the area of the pixel opening, light that does not enter the pixel opening cannot contribute to the display, and the effective aperture ratio due to bonding the microlens array is reduced. This is because the improvement effect is reduced.

D is the diameter of the converging spot, θ is the divergence (half apex angle) of incident light, and f is the focal length of the microlens.
Then, a relationship of D = 2 · f · tan θ is established. In order to reduce the area of the condensing spot of the microlens, that is, to increase the condensing effect, it is necessary to reduce the divergence θ of the incident light and shorten the focal length f of the microlens according to the above relational expression. Can be considered. Among them, the divergence θ of the incident light is smaller as the light emitting area of the light source used is smaller and the distance from the light source to the liquid crystal display element is larger. It is difficult to reduce the temperature to several degrees or less in order to secure the necessary brightness. Therefore, it is necessary to shorten the focal length f of the microlens and make the focal point of the microlens closer to the vicinity of the pixel opening of the liquid crystal display element.

In the current technology for manufacturing liquid crystal display elements, elements having a pixel pitch of 50 μm and a side of the pixel opening of about 30 μm are manufactured. In a liquid crystal display element of this size, when the divergence θ of the illumination light is set to 5 °, the focal length f must be 170 μm or less according to the above equation in order for the diameter D of the condensed spot to be 30 μmΦ. . On the other hand, the amount of light condensed by the microlens is proportional to the area thereof. Therefore, when the microlens is laid without gaps at the same pitch as the picture element pitch, that is, when the diameter of the microlens is equal to the picture element pitch P, the maximum is obtained. The numerical aperture N. of the microlens A is N. A = P / (2 · f) = 0.
147. As shown in this example, in a high-definition liquid crystal display element having a pixel pitch P of about several tens of μm, the value of the numerical aperture for reducing the converging spot of the microlens is:
Preferably, it is at least 0.1 or more.

By the way, in the microlens array having the above-mentioned microlens, the focal length in the air is 170 μm.
With a thickness of about 250 μm (a value obtained by multiplying the focal length in the air by the refractive index of the glass) corresponding to m, the focal point is set at the pixel opening of the liquid crystal display element. Must. In order to realize such a configuration, a method in which a liquid crystal display element is manufactured using a glass substrate having a thickness of 250 μm as one substrate and then a microlens array is bonded may be considered. It is difficult to handle an extremely thin glass substrate and is not suitable for mass production.

An alternative technique for shortening the focal length of a microlens is disclosed in Japanese Patent Application Laid-Open No. 3-248125. In this method, a cover glass or a film having a thickness corresponding to the focal length of the microlens is adhered to the surface of the microlens array, and a substrate having the microlens formed therein (hereinafter, the microlens is formed therein). Substrate is referred to as a microlens substrate).
This microlens substrate is used as one substrate of a liquid crystal display element. That is, the micro lens is formed in one substrate of the liquid crystal display element. Further, according to JP-A-3-233417,
The lens-shaped part is formed on the lens substrate with a photosensitive resin using the 2P method, and a cover glass having the same coefficient of thermal expansion as the lens substrate is bonded with an adhesive having a different refractive index from the resin, thereby achieving mass productivity and adhesion. Are disclosed.

As described above, for a liquid crystal display device for high definition display, the microlenses are formed inside the substrate constituting the liquid crystal display device. Further, in order to use this microlens substrate as a counter substrate, a transparent electrode, an alignment film and, if necessary, a black matrix are formed on the surface on the cover glass side. Then, the counter substrate thus obtained and the active matrix substrate are bonded together via a liquid crystal layer, and a liquid crystal display element is manufactured.

In general, a large number of liquid crystal display elements are formed on a single large-area transparent substrate in order to improve mass productivity. Therefore, even when a microlens substrate obtained by attaching a cover glass or the like to the microlens array as described above is used as a counter substrate of a liquid crystal display element, a large number of microlens arrays are arranged on a large-area transparent substrate. Therefore, a large-sized microlens substrate has been manufactured.

[0015]

However, in the technique of forming a microlens on a substrate constituting a liquid crystal display element in advance as described above, it is not necessary to handle an extremely thin glass substrate, but the microlens substrate is used as a counter substrate. Another problem that the cover glass is easily peeled off from the adhesive occurs in the processing step, and it cannot be said that mass productivity is necessarily improved.

That is, in the step of processing the above-mentioned microlens substrate into a counter substrate, a transparent electrode, an alignment film and, if necessary, a black matrix must be formed on the surface of the cover glass, which involves heat treatment. In particular, in forming the alignment film, it is necessary to bake after applying a material that can become the alignment film, for example, polyimide. In the firing process of the alignment film, the substrate is heated to a high temperature of about 200 ° C. Become.

However, the linear expansion coefficient of the cover glass is 1
While the coefficient of linear expansion of the adhesive is on the order of 10 ^-5 to 10 ^-4 K ^-1 , there is a large difference in the coefficient of linear expansion between 0 ^{-6 and} 10 ^-5 K ^-1 . Therefore, the difference in thermal expansion between the cover glass and the adhesive layer made of the adhesive is increased by this heating, and a situation occurs in which the cover glass is separated from the adhesive layer. This is more conspicuous as the substrate size increases, as in the case where a large-area microlens substrate is produced and a large number of substrates are taken.

In order to avoid such a problem, it is conceivable to lower the heating temperature when forming the transparent electrode, the alignment film, the black matrix and the like. This leads to a decrease in force, and consequently, adverse effects such as a decrease in the reliability of the liquid crystal display element and a deterioration in display quality occur, so that this method cannot be adopted.

The present invention has been made in view of the above problems, and an object of the present invention is to manufacture a microlens substrate having a short focal length and a high light-collecting effect, which can be processed under high-temperature conditions without any problem. Another object of the present invention is to provide a liquid crystal display element having high definition, a high effective aperture ratio and a bright display screen by using the microlens substrate.

[0020]

According to a first aspect of the present invention, there is provided a microlens substrate having a lens substrate and a lens-shaped portion formed on the lens substrate. or lenticular lens, the microlens substrate formed by bonding with an adhesive a transparent substrate so as to face the lens-shaped portion, to improve the adhesion of the substrate surface to the surface of the side contacting the adhesive in a transparent substrate Adhesion processing surface is formed
It is characterized in that there.

[0021]

A liquid crystal display device according to a second aspect of the present invention is:
In order to solve the above problems, a lens substrate and this lens
Having a lens-shaped portion formed on a substrate
Lens shape on lens array or lenticular lens
Paste transparent substrate with adhesive so as to face the part
Liquid crystal display device using microlens substrate configured with
, A transparent substrate constituting the microlens substrate
The surface of the side that comes into contact with the adhesive in
The adhesion treatment surface which improves the property is formed,
Wherein the microlens substrate, a transparent electrode and an alignment film is formed, a counter substrate and the active matrix substrate comprising the microlens substrate is characterized in that formed by bonding through a liquid crystal layer.

[0023]

SUMMARY OF] According to the arrangement of claim 1, before bonding with an adhesive a transparent substrate to the microlens array or lenticular lens, the adhesion of the substrate surface on the side of the surface in contact with the adhesive in a transparent substrate Improve adhesion processing surface
Is formed , the adhesive strength of the transparent substrate by the adhesive increases, and when the obtained microlens substrate is heat-treated at a high temperature, peeling at the interface between the transparent substrate and the adhesive, which is likely to occur due to a difference in thermal expansion. Can be effectively prevented. As a result, a microlens substrate that can be processed under high-temperature conditions is obtained, and various processing can be performed under high-temperature conditions. In addition, the lenticular lens referred to here is a one in which a kamaboko-shaped microlens is one-dimensionally arranged.

As a result, it is possible to obtain a microlens substrate having a short focal length and a high light-collecting effect, which can be processed without any problem under high-temperature conditions.

[0025]

[0026]

According to the second aspect of the present invention, a liquid crystal display device is provided with a transparent electrode and an alignment film formed on the microlens substrate according to the first aspect of the present invention to form a counter substrate. Since it is configured by bonding the substrate and the liquid crystal layer via a liquid crystal layer, it has high definition, has a high effective aperture ratio and a bright display screen, and can be easily obtained with excellent mass productivity. It will be cheap.

[0028]

【Example】

Embodiment 1 FIGS. 1 and 2 show an embodiment of the present invention.
This will be described below. In the present embodiment, the microlens substrate of the present invention will be described by exemplifying a case where the microlens substrate is used as a counter substrate of a liquid crystal display element.
The microlens substrate of the present invention is not limited to the present embodiment. In addition, a hemispherical microlens is exemplified, but a lenticular lens of a kamaboko type is also within the scope of the present invention.

The liquid crystal display device using the microlens substrate manufactured by the method for manufacturing a microlens substrate according to the present embodiment is an active matrix type liquid crystal display device, and as shown in FIG. It has a transparent substrate 7 made of glass. On the transparent substrate 7, a picture element electrode, a switching element, a bus wiring, and the like (not shown) are formed to constitute an active matrix substrate. A liquid crystal layer 6 is sealed between the transparent substrate 7 and an opposing substrate 10 facing the transparent substrate 7 by a sealing material 5.

The counter substrate 10 has a microlens substrate 9. The microlens substrate 9 is manufactured by the method for manufacturing a microlens substrate according to the present embodiment, and the manufacturing method will be described later. The microlens substrate 9 is formed by bonding a microlens array 8 in which a plurality of microlenses (lens-shaped portions) 2 are formed on a transparent substrate (lens substrate) 1 made of quartz glass and a cover glass (transparent substrate) 4. And a cover glass 4
The contact surface 4a is formed on a surface (adhesive surface) in contact with the adhesive layer 3 in FIG. Then, the surface of the cover glass 4 on the liquid crystal layer 6 side of the microlens substrate 9 is
A black matrix 11, a transparent electrode 12, and an alignment film 13 are sequentially formed.

The microlenses 2 in the microlens array 8 are two-dimensionally arranged in an array corresponding to each of the picture element electrodes (not shown) formed on the transparent substrate 7 disposed opposite to each other. . In this embodiment, the microlenses 2 have a hemispherical (spherical) convex lens shape, and are manufactured by the above-described 2P method.

Next, a method of manufacturing the microlens substrate 9 having a plurality of microlenses 2 formed therein, which is used for the counter substrate 10 of the liquid crystal display element, is shown in FIG.
This will be described with reference to FIG.

First, as shown in FIG. 1A, a plurality of convex microlenses 2 are formed on one surface of a transparent substrate 1 by using the above-described 2P method, and a microlens array 8 is formed.
Get. In this embodiment, a photosensitive resin UV-4000 manufactured by Daikin Industries, Ltd. is used as a resin for forming the microlens 2.
(Refractive index n = 1.567), and the shape was a hemisphere with a picture element pitch of 29 μm × 24 μm and a center curvature radius of 15.6 μm. Also, by leveling the lens surface with an adhesive having a low refractive index, which will be described later, the focal length of the microlens 2 in air becomes 0.137 μm and the refractive index becomes 1.4.
The focal length in quartz glass of No. 6 is 0.2 mm. Further, from the viewpoint of production efficiency, the transparent substrate 1 has a large area, and a plurality of microlens arrays 8 are arranged so that a large number of opposing substrates 10 can be removed.

Next, as shown in FIG. 4B, a transparent quartz glass transparent substrate 4 ′ serving as the cover glass 4 described above.
The transparent adhesion treatment agent 15 is applied to the surface to be bonded to the transparent substrate 1 by a spinner, and then naturally dried at room temperature to form the adhesion treatment surface 4a (see FIG. 3C). The adhesion treatment agent 15 has an effect of improving the hydrophilicity by modifying the surface of the substrate and increasing the adhesion between the transparent substrate 4 'coated with the agent and the adhesive. In this example, OAP manufactured by Tokyo Ohka Kogyo Co., Ltd., which is used for the application of a photoresist, was used as the adhesion treatment agent 15. In addition, as the adhesion treatment agent 15, a substance called a silane coupling agent or a primer can be used. still,
Here, a treatment for increasing the hydrophilicity is performed as a means for improving the adhesion, but depending on the type of the adhesive or the substrate to be used, there is a means other than such a method for increasing the hydrophilicity. The thickness of the cover glass 4 (the value obtained by multiplying the focal length of the microlens 2 by the refractive index of the glass) is 0.2 mm as described above. However, considering the convenience of handling, it is a standard product. A 62 mm transparent substrate 4 'was used.

Next, an adhesive layer 3 made of a low-refractive index adhesive is formed on the surface of the microlens array 8 where the microlenses 2 are formed, and through this, the microlens array 8 and the transparent substrate 4 are formed. To obtain a microlens substrate 9 'in which the microlenses 2 are formed. In this example, a photosensitive resin UV-1000 (refractive index n = 1.453) manufactured by Daikin Industries, Ltd. was used as a low refractive index adhesive for forming the adhesive layer 3. Then, the adhesive force of the adhesive is increased, and the peeling at the interface between the microlens array 8 and the adhesive layer 3 and the peeling at the interface between the transparent substrate 4 ′ serving as the cover glass 4 and the adhesive layer 3 are respectively increased. To prevent this, a silane coupling agent was mixed. The mixing ratio is 0.1-0.5% by weight
The range of the concentration.

Thereafter, as shown in FIG. 4D, polishing is performed until the thickness of the transparent substrate 4 'reaches the target 0.2 mm from 0.625 mm. At this time, the transparent substrate 4 'is arranged while paying attention to the inclination of the substrate so that the substrate thickness becomes uniform as a whole. Thus, a microlens substrate 9 in which the thin cover glass 4 is adhered to the surface of the microlens array 8 is manufactured as shown in FIG.

The obtained microlens substrate 9 has a black matrix 11, a transparent electrode 12, and an alignment film 13 formed on the surface of a cover glass 4 under a high temperature condition, as shown in FIG. 10 is formed. Polyimide is used for the alignment film 13, and baking is performed at a temperature of about 200 ° C. in order to promote imidization. Thereafter, the opposing substrate 10 and the above-described active matrix substrate are bonded together with the sealant 5 via the liquid crystal layer 6 to form a liquid crystal display element (see FIG. 2).

As described above, in this embodiment, before the transparent substrate 4 ′ serving as the cover glass 4 is bonded to the microlens array 8 with the adhesive, the surface of the transparent substrate 4 ′ in contact with the adhesive is applied to the adhesive treatment agent. 15 is applied to form the contact-treated surface 4a. Therefore, the selective expansion coefficient of the cover glass 4 made of quartz glass is of the order of 5.9 × 10 ⁻⁷ K ⁻¹ , whereas the linear expansion coefficient of the adhesive layer 3 is 7.9 × 10 ⁻⁵ K. ^-1
In the microlens substrate manufactured by the conventional manufacturing method, there is a large difference in the linear expansion coefficient in the order of
When the temperature is raised to about 0 ° C., the difference in thermal expansion between the cover glass and the adhesive layer increases in proportion to the substrate size, and the cover glass is easily peeled off from the adhesive layer. In the microlens substrate 9 manufactured by the method, the adhesion processing surface 4a applied to the bonding surface of the transparent substrate 4 '
The adhesive strength between the cover glass 4 and the adhesive layer 3 is improved, and peeling at the interface between the cover glass 4 and the adhesive layer 3 is prevented.

Further, in this embodiment, since the silane coupling agent is mixed in the adhesive forming the adhesive layer 3, the adhesive layer 3 and the microlens substrate are mixed by the mixed silane coupling agent. The bonding strength with the microlens substrate 8 is also improved, and the microlens substrate 9 is of higher quality without peeling off at the interface between the adhesive layer 3 and the microlens substrate 8 and the cover glass 4. Therefore, FIG.
The firing temperature in the alignment film forming step shown in (f) can be further increased, and the quality of the alignment film 13 can be improved.

As a result, a black matrix 11, a transparent electrode 12, and an alignment film 1 were formed on the microlens substrate 9.
3 is formed as a counter substrate 10, and the counter substrate 10 and the transparent substrate 7 as an active matrix substrate are combined with a liquid crystal layer 6.
The liquid crystal display element shown in FIG. 2 which is manufactured by laminating through the substrate has high definition, a high effective aperture ratio, a bright display screen, and can be easily obtained with excellent mass productivity. It can be cheaper.

Further, in this embodiment, the transparent substrate 1, the cover glass 4, and the transparent substrate 7 are all made of the same material, so that the linear expansion coefficient of each substrate can be reduced in the same manner as described above. Due to the difference, the microlens 2, the transparent substrate 1, the cover glass 4, and the transparent substrate 7 are prevented from peeling off.

Note that the above-described embodiment is only for clarifying the technical contents of the present invention, and the materials used are merely examples.

Embodiment 2 As another embodiment of the present invention,
A liquid crystal projector was manufactured using the liquid crystal display device of the above embodiment. In this case, by using a liquid crystal display element having a high effective aperture ratio, a fine image could be obtained and a high-quality one could be realized.

Hereinafter, a liquid crystal projector using a liquid crystal display device using the microlens substrate 9 according to the first embodiment will be described in detail with reference to FIG. For convenience of explanation, members having the same functions as the members shown in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

This liquid crystal projector has an optical system 25 shown in FIG. According to this optical system 25, the irradiation light of the white light source 17 such as a metal halide lamp
The dichroic mirror 19a via the R filter 18
19b. Dichroic mirrors 19a and 19
In b, the incident light is separated into three primary colors of red, green and blue.

For example, it is assumed that only blue light is reflected by the dichroic mirror 19a, and only green light is reflected by the dichroic mirror 19b. In this case, the blue light separated by the dichroic mirror 19a is
a to the liquid crystal display element 21a. The green light and the red light transmitted through the dichroic mirror 19a enter the dichroic mirror 19b. In the dichroic mirror 19b, only green light is reflected and guided to the liquid crystal display element 21b, while red light is transmitted and guided to the liquid crystal display element 21c.

Each of the liquid crystal display elements 21a to 21c has the microlens substrate 9 described in the first embodiment.
Each primary color image is displayed based on the video signal. The blue light transmitted through the liquid crystal display element 21a enters the dichroic mirror 23a via the field lens 22a. The green light transmitted through the liquid crystal display element 21b is
b enters the dichroic mirror 23a. The red light transmitted through the liquid crystal display element 21c enters the dichroic mirror 23b via the field lens 22c and the reflecting mirror 20b. Dichroic mirrors 23a and 23
In b, after the primary color lights respectively transmitted through the liquid crystal display elements 21a to 21c are combined, the combined light is guided to the projection lens 24, and the image is enlarged and projected on a screen (not shown).

In the above-mentioned liquid crystal projector, a microlens 2 having a short focal length is attached to each pixel in accordance with the reduction in the pixel size (high definition) of the liquid crystal display element. The light blocked by the black matrix in the fine liquid crystal display element is condensed by the microlenses 2 without waste into the pixel openings, and a bright display screen can be obtained.

In the above description, the case where only the blue light is reflected by the dichroic mirror 19a and only the green light is reflected by the dichroic mirror 19b has been described. However, the present invention is not limited to this. It suffices that the irradiation light of 17 is separated into three primary colors of red, green and blue.

[0050]

As described above, the microlens substrate according to the first aspect of the present invention has a structure in which the transparent substrate is brought into contact with the adhesive before the transparent substrate is bonded to the microlens array or the lenticular lens with the adhesive. The surface of the substrate is provided with an adhesion treatment surface for improving the adhesion of the substrate surface.

As a result, the adhesive strength of the transparent substrate with the adhesive is increased, and when the obtained microlens substrate is heat-treated at a high temperature, peeling at the interface between the transparent substrate and the adhesive, which is easily caused by thermal expansion, is prevented. It can be effectively prevented. As a result, a microlens substrate that can be processed under high-temperature conditions is obtained, and various processing can be performed under high-temperature conditions. As a result, it is possible to obtain a microlens substrate having a short focal length and a high light-condensing effect that can be processed without any problem under a high-temperature condition.

[0052]

[0053]

The liquid crystal display element according to claim 2 of the present invention
As described above, the lens substrate and the lens substrate are formed on the lens substrate.
Microlens array having
Faces the lenticular lens with the lens-shaped part
A transparent substrate is bonded with an adhesive
In a liquid crystal display device using an micro lens substrate,
Adhesive on transparent substrate that constitutes microlens substrate
Improves the adhesion of the substrate surface to the surface in contact with
With adhesion treated surface is formed, the said micro-lens substrate, it a transparent electrode and an alignment film is formed
In this configuration, a counter substrate composed of the microlens substrate and an active matrix substrate are bonded together via a liquid crystal layer.

As a result, a high definition, a high effective aperture ratio and a bright display screen can be obtained, and excellent mass productivity can be easily obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a step of manufacturing a microlens substrate and a step of processing the microlens substrate into a counter substrate.

FIG. 2 is a cross-sectional view illustrating a structure of a liquid crystal display element.

FIG. 3 is an explanatory diagram showing a main configuration of a liquid crystal projector device using the liquid crystal display element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent substrate (lens substrate) 2 Micro lens 3 Adhesive layer (adhesive) 4 Cover glass (transparent substrate) 4a Adhesion processing surface 5 Sealing material 6 Liquid crystal layer 7 Transparent substrate 8 Micro lens array 9 Micro lens substrate 10 Counter substrate 11 Black matrix 12 Transparent electrode 13 Alignment film 15 Adhesion treatment agent 17 White light source 18 UV-IR filter 19a Dichroic mirror 19b Dichroic mirror 20a Reflecting mirror 20b Reflecting mirror 21a Liquid crystal display element 21b Liquid crystal display element 21c Liquid crystal display element 23a Dichroic mirror 23b Dichroic mirror 24 Projection lens

Claims (2)

(57) [Claims] To 1. A lens substrate and a microlens array or lenticular lens and a formed lens-shaped portion in the lens substrate, it is composed a transparent substrate so as to face the lens-shaped portion bonded by an adhesive was in my <br/> Kurorenzu substrate, on the side of the surface in contact with the adhesive in the transparent substrate is not contact the treated surface to improve adhesion of the substrate surface is formed
Microlens substrate, characterized in that that. 2. A lens substrate and a lens substrate formed on the lens substrate.
Microlens array having a curved lens-shaped portion or
The lenticular lens faces the lens-shaped part
A transparent substrate is bonded with an adhesive
In a liquid crystal display device using a chlorine lens substrate, contact with a transparent substrate constituting the microlens substrate is performed.
The surface in contact with the adhesive has improved adhesion on the substrate surface.
The adhesive treatment surface is formed
No transparent electrode and alignment film are formed on the lens substrate.
Ri, a counter substrate and the active comprising the microlens substrate
Matrix substrate is bonded via liquid crystal layer
A liquid crystal display element characterized in that: