JP2000066186A - Reflection type liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection type liquid crystal display device high in the availability of light and capable of obtaining a bright screen display by providing the device with the function for converging external light to the position of an observer as much as possible out of the external light incident on the reflection type liquid crystal display while keeping the advantage of the reflection type liquid crystal display device. SOLUTION: In this reflection type liquid crystal display device having at least a substrate of an observer's side 1 comprising a transparent substrate on which a transparent electrode 4 for driving liquid crystal is located, a substrate of the rear side 10 comprising a substrate on which a light reflecting film 9 and a transparent electrode for driving liquid crystal corresponding to the previously described transparent electrode are laminated, liquid crystal 5 held between both substrates and a light scattering film located between both of the substrates, the light scattering film 21 is composed of micro lenses 2 plurally located on the area of each pixel part non-pixel part and a flattening layer 3 covering the micro lenses 2, and the micro lenses are located in a plane so as to be made close-packed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection type liquid crystal display device having a light scattering film formed thereon to increase the viewing angle and improve the display quality.
The present invention relates to a liquid crystal display device for DA, personal portable information equipment, and the like.

[0002]

2. Description of the Related Art A liquid crystal display device generally comprises a pair of opposing electrode substrates on which a polarizing film and a transparent electrode are provided, respectively, and a liquid crystal material sealed between these electrode substrates. I have. Further, in a color liquid crystal display device for displaying a color image, a color filter layer for coloring polarized light is provided on one of the pair of electrode substrates.

When displaying a screen, a voltage is applied between the transparent electrodes facing each other to change the orientation of the liquid crystal material sealed between the electrode substrates, thereby controlling the plane of polarization of light transmitted through the liquid crystal material. At the same time, transmission and non-transmission are controlled by a polarizing film.

[0004] Here, the liquid crystal display device is an electrode substrate on the rear side of the liquid crystal display device (refers to an electrode substrate located on the opposite side to the viewer among a pair of opposing electrode substrates, and is hereinafter referred to as a rear side substrate). ), A built-in light source (backlight) is disposed on the back surface or side surface, and a light beam emitted from the built-in light source is incident on the back substrate to obtain a display screen. A transmissive liquid crystal display device with a built-in light is widely used. However, this transmission type liquid crystal display device consumes a large amount of power for a built-in light source, and has a power consumption that is not much different from other display devices other than the liquid crystal display device (for example, a CRT, a plasma display device, etc.). For this reason, it can be said that the transmission type liquid crystal display device loses the essential characteristics of the liquid crystal display device which should be portable with low power consumption. Also,
In the transmission type liquid crystal display device, the built-in light source is consumed over time, and when the built-in light source is consumed, the display quality is significantly impaired. Moreover, in many cases, it is difficult or impossible to replace the exhausted built-in light source.

On the other hand, a reflection type liquid crystal display device without a built-in light source is known as a liquid crystal display device. That is, the reflection type liquid crystal display device is configured such that the electrode substrate located on the observer side (refers to the electrode substrate located on the observer side of the pair of opposing electrode substrates, hereinafter referred to as the observer-side substrate) from the indoor side. Light and external light are made to enter the display device, the incident light is reflected by a light reflecting plate made of a metal plate or the like provided on the rear substrate, and a screen display is performed using the reflected light. The reflection type liquid crystal display device can be said to be an ideal display device with low power consumption because it does not use a built-in light source, and can be said to be lightweight and convenient for portable use.

Conventionally, the following structures and the like have been known as the structure of a reflection type liquid crystal display device. That is, FIG.
As shown in (1), a TFT (thin film transistor) array is formed on the rear substrate 60, and an insulating film is formed on the TFT array. Next, a metal reflection film 69 made of aluminum (Al) or the like is laminated on a predetermined portion on the insulating film. Note that the surface of the insulating film is provided with irregularities so that when the metal reflective film 69 is stacked, the surface of the metal reflective film 69 becomes irregular and has a light scattering property. That is, by imparting light scattering to the metal reflective film 69 and scattering the reflected light, the incident light having a certain incident angle can be made the reflected light for screen display, so that the viewing angle of the display device is increased. is there. Also, the metal reflection film 69 and T
The FT array is electrically connected to the liquid crystal 65 through via holes in order to apply a voltage to the liquid crystal 65. As shown in FIG. 5, a transparent electrode 64 is formed on the observer-side substrate 61, and a voltage is applied between the metal reflective film 69 and the transparent electrode 64 when driving the liquid crystal 65 sandwiched between the substrates.

FIG. 6 shows another structure of a conventional reflection-type liquid crystal display device. That is,
A metal reflection film 79 is uniformly provided on the back surface side of the rear substrate 70 on which the transparent electrode 76 is formed, opposite to the surface on which the transparent electrode 76 is formed. In addition, in order to scatter incident light, irregularities are generally formed on the surface of the metal reflection film 79. When driving the sandwiched liquid crystal 75, the transparent electrode 74 formed on the observer-side substrate 71 and the transparent electrode 76 formed on the back-side substrate 70
And a voltage is applied.

However, in the reflection type liquid crystal display device having the structure shown in FIG. 5, since the metal reflection film 69 also serves as an electrode for driving the liquid crystal and the reflection scattering film, each pixel portion (voltage is applied to the sandwiched liquid crystal). Is applied to change the alignment state of the liquid crystal. Usually, light incident on the region between the electrode formed on the observer-side substrate and the electrode formed on the back-side substrate overlaps in plan view). Are not used for screen display, and there is a problem that light use efficiency is poor. Note that, in the following description, a region serving as a pixel is referred to as a pixel portion, and a region between the pixel portions is referred to as a non-pixel portion.

In the reflection type liquid crystal display device shown in FIG. 6 in which the metal reflection film 79 (scattering film) is provided on the rear surface of the rear substrate, a part of the light incident on the non-pixel portion is reduced. Used. However, the metal reflection film 79 (scattering film) is mainly intended to improve the viewing angle as a display device,
In addition, since the metal reflection film 79 (scattering film) is formed of a metal thin film in the form of a film sheet in many cases, there is no selective light-collecting and light-scattering properties, and the light use efficiency is still poor.

Further, in the reflection type liquid crystal display device having the structure shown in FIG. 6, since the metal reflection film 79 (scattering film) is on the back surface of the rear substrate 70, an optical path difference occurs due to the thickness of the substrate 70. That is, after the light that has entered from the observer side substrate 71 and passed through the pixel portion is reflected by the metal reflective film 79, an optical path difference occurs due to the thickness of the substrate 70, so that the light enters the pixel portion adjacent to the pixel portion that has entered and passed therethrough. The reflected light will be incident. For this reason, display defects such as color mixing occur on the display screen,
In addition, it can be said that the light incident on the rear substrate 70 is reflected on the surface of the transparent electrode 76 formed on the rear substrate 70 and on the surface of the metal reflection film 79 on the rear surface, thereby generating a double image.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a reflective liquid crystal display device while maintaining the advantages of the reflective liquid crystal display device. It is an object of the present invention to provide a reflection type liquid crystal display device having a function of condensing as much light as possible among light incident on an observer at an observer position, thereby using light efficiently and displaying a bright screen.

[0012]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and have reached the present invention. That is, in claim 1 of the present invention, an observer side substrate in which a transparent electrode for driving liquid crystal is disposed on a transparent substrate;
A back-side substrate in which a light reflection film and a transparent electrode for driving a liquid crystal corresponding to the transparent electrode are laminated on a substrate; a liquid crystal sandwiched between the two substrates; and a light scattering device disposed between the two substrates. In a reflection type liquid crystal display device having at least a film, a light scattering film is constituted by a plurality of microlenses disposed in each pixel portion and a non-pixel portion region, and a flattening layer covering the microlenses, and This is a reflection type liquid crystal display device, wherein the lenses are arranged in a plane so that the filling rate is the closest.

The light scattering film composed of the plurality of microlenses and the flattening layer covering the microlenses according to the present invention is provided on the light reflecting film provided on the rear substrate or on the observer substrate. Formed on any one of the above. Further, the transparent electrode formed in the reflection type liquid crystal display device of the present invention may have a well-known shape, and may have a predetermined shape as appropriate according to a well-known liquid crystal driving method such as simple matrix driving or active matrix driving.

FIG. 1 is a cross-sectional view schematically showing one example of a reflection type liquid crystal display device according to the present invention. In the reflection type liquid crystal display device of FIG. 1, the light scattering film 21 composed of the microlens 2 and the flattening layer 3 according to the present invention is formed on the observer side substrate. With the reflection type liquid crystal display device having such a configuration, light incident on the non-pixel portion from the observer side is refracted or scattered by the microlenses 2 formed on the observer side substrate as shown in FIG. As a result, the light enters the pixel portion, and is thereafter reflected by the metal reflection film 9 formed on the rear substrate, and is emitted from the observer substrate to the observer side.

FIG. 2 is a sectional view schematically showing another example of the reflection type liquid crystal display device according to the present invention. FIG.
In the reflection type liquid crystal display device, a light scattering film 31 composed of the microlenses 12 and the flattening layer 13 according to the present invention is formed on the rear substrate. With the reflection type liquid crystal display device having such a configuration, light incident from the observer side and passing through the non-pixel portion is refracted or scattered by the microlenses 12 and then reflected by the reflection film 19 as shown in FIG. The light is reflected, enters the pixel portion, and is then emitted from the observer side substrate to the observer side.

That is, in the reflection type liquid crystal display device of the present invention, light incident on a non-pixel portion which has not been conventionally used for screen display is refracted by a light scattering film comprising a microlens and a flattening layer. , Almost 100% of the light incident on the reflective liquid crystal display device can be used for screen display. That is, the observer can obtain light characteristics with a wide viewing angle, which cannot be obtained with a conventional reflection film or light scattering film made of a metal such as Al, and can observe a bright screen display. .

In order to refract or scatter the light incident on the non-pixel portion and make it incident on the pixel portion, a micro lens located in the non-pixel portion is formed instead of forming a microlens alone in the non-pixel portion. It is preferable that the lens is formed so as to overlap with an adjacent pixel portion, that the width of the microlens is wider than the width of the non-pixel portion, and that the lens center of the microlens is located in the pixel portion. It can be said that.

Here, in order to efficiently condense or scatter the light incident from the observer side by the microlens and make it incident on the pixel portion, the planar filling rate must be set when the microlens is arranged. If the height is increased and the gap between the microlenses is made as small as possible, the rate of taking in the incident light into the microlens is increased, the light use efficiency is increased, and a bright screen display is possible. As the shape of the microlens, a shape whose surface shape forms a part of a spherical surface (a so-called convex lens shape) is desirable. That is, by adopting such a shape, the microlens has the function of a spherical lens, and the light incident on the non-pixel portion can be collected or scattered and guided to the pixel portion.

Next, the present inventors have studied the shape of the bottom surface of the microlens which can increase the filling factor and reduce the gap between the microlenses when the microlenses are arranged in a plane. As a result, as shown in FIG. 3 schematically showing a plan view of the light scattering film, the bottom shape of the micro lens 2 is made hexagonal, and the micro lenses 2 are arranged in a honeycomb shape (tortoise shell shape). For example, they have conceived that the planar filling rate of the microlenses can be increased and the gap between the microlenses can be reduced. That is, in the second aspect of the present invention, there is provided a reflection type liquid crystal display device characterized in that the bottom shape of the microlenses is hexagonal and arranged in a honeycomb shape in plan view.

As described above, in order to increase the filling rate of the microlenses and to improve the productivity of the microlenses, it is desirable that the planar shape of the bottom surface of the microlenses is hexagonal, but it is preferable that the microlenses have a round shape. It is also possible to make it square. In addition, in order to obtain the desired light-collecting and scattering effects, the surface shape of the microlenses may not be all part of a spherical surface, but may be partly aspherical.

Next, the light scattering film composed of the microlens and the flattening layer covering the microlens has a difference in refractive index between the microlens and the flattening layer when considering only the light scattering property. It is sufficient that one of the refractive indexes is high, and for example, the refractive index of the microlens may be lower than the refractive index of the flattening layer. However, in order to guide the light incident on the non-pixel portion from the oblique direction to the pixel portion, for example, it is necessary to refract the light incident on the microlens passing through the non-pixel portion and to condense the light on the central portion, that is, the pixel portion. Therefore, it is desirable that the refractive index of the microlens is higher than the refractive index of the flattening layer.

That is, the invention according to claim 3 defines the relationship between the refractive index of the microlens and the flattening layer, and is based on the reflection type liquid crystal display device according to claim 1 and is more distant from the observer side. In order to guide the light incident on the pixel portion to the pixel portion, a reflective liquid crystal display device is characterized in that the refractive index of the microlens is higher than the refractive index of the flattening layer covering the microlens. . Note that the flattening layer is formed for the purpose of flattening a transparent electrode or an alignment film provided on the light scattering film by forming a flat surface while filling a step generated between microlenses. . By forming the transparent electrode and the alignment film flat, it is possible to prevent display unevenness and response unevenness of the screen.

As a material having a high refractive index to be a micro lens, a material having a high light transmittance and a high refractive index is preferable, and
Those having small chromatic dispersion in the visible light region are preferable. As such a material, for example, a polycarbonate resin, a polystyrene resin, an acrylic epoxy resin, a fluorene-based acrylic resin, a polyimide resin, an aliphatic polycondensation product, or the like can be used. On the other hand, as a low refractive index material that is a flattening layer covering the microlens, for example, a refractive index of 1.
An organic silicate having a refractive index of 46 to 1.48 or a fluorine-based resin having a refractive index of 1.34 to 1.45 can be used. As the organic silicate, for example, a product name “FPCF series” manufactured by Tokyo Ohka Co., Ltd. (refractive index: 1.46 to 1.4)
8) and the like, and examples of the fluorine-based resin include tetrafluoroethylene and hexafluoropropylene copolymer (refractive index: 1.34) and fluorine-based acrylic resin (refractive index: 1.34 to 1.40) Can be applied.

As a means for forming a microlens using the above-described organic resin or the like, for example, a printing method can be used. In addition, the organic resin is composed of a photosensitive resin,
This photosensitive resin is applied, for example, on the reflection film of the rear substrate to form a coating film, and thereafter, by performing a predetermined pattern exposure and development, the photosensitive resin is applied to a predetermined portion including the non-pixel portion. Let it survive. Then, a method of melting the remaining photosensitive resin by heat and deforming the photosensitive resin into a microlens shape by the surface tension is also possible.

When a micro lens is formed, a non-pixel portion may be formed with a micro lens so as to have a light scattering property. At that time, the shape of the micro lens formed in the non-pixel portion is formed in the pixel portion. It may be different from the shape of the micro lens.

Next, as a substrate serving as a base of the observer-side substrate and the back-side substrate, a plastic film, a plastic plate or the like can be used in addition to a glass plate. Further, a color filter layer for coloring light passing through each pixel portion into a corresponding color (for example, R (red) color, G (green) color, B (blue) color, etc.) is formed on this substrate. As a result, color display is possible as a reflection type liquid crystal display device. Further, the position where the color filter layer is formed may be on either the observer side or the back side substrate, and may be appropriately selected according to the structure of the reflective liquid crystal display device. Further, the microlens and the color filter may not be formed on separate substrates but may be formed on the same substrate. That is, the invention according to claim 4 is based on the reflection type liquid crystal display device according to claims 1 to 3, and the color filter is disposed on one of the observer side substrate and the back side substrate. This is a reflection type liquid crystal display device characterized by the following.

As described above, in the reflection type liquid crystal display device according to the present invention, in order to efficiently guide the light incident on the observer side substrate from the observer side to the pixel portion, the light scattering film is formed of a micro lens and a micro lens. And a flattening layer covering the
In addition, the bottom shape of the microlens is hexagonal, and the microlenses are arranged and formed in a honeycomb so as to be the most densely packed in a plane.

In the reflection type liquid crystal display device having such a configuration, light incident on the observer-side substrate is condensed and scattered by the microlenses, and is guided to the pixel portion. That is, the reflection type liquid crystal display device of the present invention enables a bright screen display with high light efficiency.

Further, by appropriately changing the lens shape of the microlens and the refractive index difference from the flattening layer, the scattered light distribution can be easily controlled, and the reflection type liquid crystal display device having different pixel pitches. It can respond to various needs such as application to

Further, since various known microlens forming techniques can be applied to the formation of the microlens according to the present invention, the reflection type liquid crystal display device of the present invention can be manufactured simply and reliably.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below.

Embodiment 1 FIG. 1 is a sectional view schematically showing a reflection type liquid crystal display device according to Embodiment 1. FIG.
As shown in (1), in the reflection type liquid crystal display device according to the first embodiment, the observer side substrate and the back side substrate are opposed to each other so that the transparent electrodes (transparent electrode 4 and transparent electrode 6) formed on each substrate face each other. The liquid crystal 5 is sealed and sandwiched between the two substrates.

The observer-side substrate has a plurality of 1.5 μm-thick microlenses 2 (convex lenses) provided on a glass substrate 1 having a thickness of 0.7 mm and aligned with each other, and covers the plurality of microlenses 2. A flattening layer 3 for flattening the surface thereof, and a striped pattern corresponding to the transparent electrode 6 formed on the rear substrate and provided on the light scattering film 21 composed of the microlenses 2 and the flattening layer 3. It is formed with the transparent electrode 4.

The micro lens 2 according to the first embodiment includes:
It was formed as follows. That is, first, a photosensitive acrylic resin was applied on the glass substrate 1. Next, the photosensitive acrylic resin that has been subjected to predetermined pattern exposure and development is heated, and then the photosensitive acrylic resin remaining on the glass substrate 1 is melted. It is transformed into

At this time, as shown in the plan view of FIG. 3, the bottom shape of the microlenses 2 was made hexagonal, and the individual microlenses were alternately arranged in a honeycomb shape (turtle shell shape). In the first embodiment, the size of the pixel portion (rectangular portion in a plan view shown by a dotted line in FIG. 3) was 100 μm × 300 μm, and the pitch of the microlenses 2 was 15 μm. The thickness of the micro lens 2 was about 1.5 μm.

On the other hand, the flattening layer 3 was formed by applying a fluorine-based compound modified acrylic resin having a refractive index of 1.43.
At this time, the microlens 2 and the flattening layer 3 were formed such that the total thickness was about 2.5 μm.

Next, a transparent conductive film made of ITO (mixed oxide made of indium oxide and tin oxide) is uniformly formed on the light scattering film 21 made of the microlenses 2 and the flattening layer 3 to a thickness of 1400 angstroms. The film was formed by sputtering so as to be as follows. Next, a known photolithography process using a positive resist was performed to form a stripe-shaped transparent electrode 4, which was used as an observer-side substrate.

Next, a liquid crystal 5 is formed by separately manufacturing a rear substrate on which a metal reflection film 9, a color filter 8, a planarizing layer 7, and a transparent electrode 6 are sequentially laminated on a transparent substrate 10, and the observer substrate. By sticking together so as to be sandwiched, a reflection type liquid crystal display device shown in FIG. 1 was obtained.

<Embodiment 2> FIG. 2 is a sectional view schematically showing a reflection type liquid crystal display device according to Embodiment 2. FIG.
As shown in (1), in the reflection type liquid crystal display device according to the second embodiment, the observer side substrate and the back side substrate are opposed to each other, and the liquid crystal 15 is sealed and sandwiched between both substrates.

The rear-side substrate is provided on a glass substrate 20 having a thickness of 0.7 mm and a metal reflection film 19 patterned to the size of a display screen, and provided in position alignment with the metal reflection film 19.
Plural microlenses 12 (convex lens) with a thickness of 1.5 μm
And a flattening layer 13 covering the plurality of microlenses 12 to flatten the surface thereof, and a striped transparent electrode 16 corresponding to the transparent electrode 14 formed on the opposing observer side substrate.
And form.

Here, the metal reflection film 19 was formed as follows. That is, first, after the surface of the glass substrate 20 was cleaned by performing glow discharge, a transparent conductive film made of ITO was formed on the surface of the substrate 20 by sputtering so as to have a thickness of 1400 angstroms. Next, after applying a photosensitive resist on the transparent conductive film, exposure and development were performed at a screen size. Next, a portion of the transparent conductive film exposed from the photosensitive resist having a predetermined pattern was removed by etching with a ferric chloride solution, and then the photosensitive resist was removed to obtain a metal reflection film 19.

Next, the microlens 12, the planarizing layer 13, and the transparent electrode 16 were sequentially formed on the metal reflection film 19 in the same manner as in the first embodiment. Then, a separately manufactured glass substrate
An observer-side substrate, in which a color filter 18, a planarizing layer 17, and a transparent electrode 14 are sequentially formed and laminated on the substrate 11, and the back-side substrate are bonded so as to sandwich the liquid crystal 15, and this embodiment shown in FIG. A reflective liquid crystal display device according to Example 2 was obtained.

FIG. 4 is a graph showing the degree of change in light scattering when the viewing angle is changed. In the graph of FIG. 4, the horizontal axis represents the viewing angle, and the vertical axis represents the brightness of the reflected light. Here, the curve in FIG. 4 indicates that the metal reflection film 19 is formed on the substrate 20 obtained in Example 2 described above.
FIG. 6 shows measurement data obtained on a rear substrate on which a light scattering film 31 composed of a microlens 2 and a flattening film 3 is sequentially laminated. Curves are used in the conventional reflection type liquid crystal display device shown in FIG. The measurement data obtained with a commercially available Al reflector (reflection film 79), and the curve shows the measurement data obtained with plain paper for reference.

As can be seen from FIG. 4, plain paper ()
The reflectance is low at all viewing angles, and the reflectance is flat. Further, it can be said that light is scattered to a high viewing angle side in a commercially available Al reflector ().
Light of 0 ° or more cannot be used for liquid crystal display. On the other hand, a commercially available Al reflector () has a viewing angle of 0 ° to 40 ° for an observer.
It can be said that the reflectance in the vicinity is low and the light utilization rate is low. On the other hand, the substrate () on which the light scattering film according to the present invention is formed,
The scattered light was condensed in the vicinity of the observer's viewing angle of 0 ° to 40 °, and brightness twice or three times that of a commercially available Al reflector () was obtained.

The embodiment of the present invention has been described above.
Embodiments of the reflective liquid crystal display device according to the present invention are not limited to the above description and drawings, and it goes without saying that various modifications may be made based on the gist of the present invention.

[0046]

As described above, in the reflection type liquid crystal display device of the present invention, the light scattering film is composed of a plurality of microlenses and the flattening layer covering the microlenses, and the bottom surface of the microlenses is formed. Are hexagonal, and the microlenses are arranged and formed in a honeycomb shape in plan view. The refractive index of the microlens is higher than the refractive index of the flattening layer.

Therefore, in the reflection type liquid crystal display device of the present invention, even if the light enters the non-pixel portion of the observer side substrate from the observer side, it is guided to the pixel portion by the light scattering film, or After being reflected by the light reflecting film, the light is guided to the pixel portion by the light scattering film. Thereby, the reflection type liquid crystal display device of the present invention can observe a bright display screen.

Further, since various known microlens forming techniques can be applied to the formation of the microlens according to the present invention, the reflection type liquid crystal display device of the present invention can be manufactured simply and reliably. .

[0049]

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a main part of one embodiment of a reflection type liquid crystal display device of the present invention.

FIG. 2 is an explanatory sectional view showing a main part of another embodiment of the reflection type liquid crystal display device of the present invention.

FIG. 3 is an explanatory plan view showing an example of an arrangement of microlenses formed in the reflective liquid crystal display device of the present invention.

FIG. 4 is a graph showing an example of comparison between the light scattering film according to the present invention and another light scattering film.

FIG. 5 is an explanatory sectional view showing a main part of an example of a conventional reflection type liquid crystal display device.

FIG. 6 is an explanatory sectional view showing a main part of another example of a conventional reflection type liquid crystal display device.

[Explanation of symbols]

 1, 10, 11, 20 Substrate 60, 61, 70, 71 Substrate 2, 12 Microlens 3, 13 Flattening layer 4, 6, 14, 16 Transparent electrode 5, 15 Liquid crystal 7, 17 Flattening layer 8, 18 Color Filter 9, 19 Reflective film 21, 31 Light scattering film 64, 74, 76 Transparent electrode 65, 75 Liquid crystal 77 Flattening layer 68, 78 Color filter 69, 79 Reflective film

Continued on the front page F term (reference) 2H091 FA02Y FA14Y FA29Y FB02 FC01 FC10 FC12 FD03 FD04 GA01 GA03 GA13 GA16 KA01 LA03 LA16 5C094 AA10 AA43 AA46 AA48 BA03 BA43 CA24 DA11 EA04 EA05 ED01 FA01 ED10 FA03

Claims (4)

[Claims] An observer-side substrate on which a transparent electrode for driving a liquid crystal is disposed on a transparent substrate, and a back side on which a light reflecting film and a transparent electrode for driving a liquid crystal corresponding to the transparent electrode are laminated on the substrate. In a reflection type liquid crystal display device having at least a substrate, a liquid crystal sandwiched between the two substrates, and a light scattering film disposed between the two substrates, the light scattering film is formed in each pixel region and a non-pixel region. A reflective liquid crystal display device comprising: a plurality of microlenses disposed on a substrate; and a flattening layer covering the microlenses, wherein the microlenses are arranged in a plane so that the filling rate is the closest. 2. The micro lens has a hexagonal bottom surface,
2. The arrangement according to claim 1, wherein the arrangement is in a honeycomb shape in plan view.
3. The reflection type liquid crystal display device according to item 1. 3. The reflective liquid crystal display device according to claim 1, wherein the refractive index of the microlens is higher than the refractive index of the flattening layer covering the microlens. 4. The reflection type liquid crystal display device according to claim 1, wherein the color filter is provided on one of the observer side substrate and the back side substrate.