JP2000047183A - Reflection type liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to observe a light display screen by forming a light scattering film of microlenses and a flattening layer and forming at least the microlenses at a non-pixel part over both a pixel part and the non- pixel part. SOLUTION: The light made incident on the non-pixel part from an observer side where the light scattering film 21 consisting of the microlenses 2 and flattening layer 3 is formed on an observer-side substrate enters the pixel part by being refracted by the microlenses 2. Then the light is reflected by a metal reflecting film 9 formed on a back-side substrate and exits from the observer- side substrate to the observer side. In this case, the microlenses 2 positioned at the non-pixel part overlapping with the pixel part (formed over both the non-pixel part and pixel part) are formed at intervals wider than the width of the non-pixel part so as to efficiently guide the light made incident on the non-pixel part from the observer side.

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,
The transmissive liquid crystal display device has a built-in light source that is worn over time, and when the built-in light source is worn, the display quality is significantly impaired. In addition, it is difficult or impossible to replace the worn built-in light source. Often it has a structure.

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. 6, a transparent electrode 64 is formed on the observer side substrate 61, and when driving the liquid crystal 65 sandwiched between the substrates, a voltage is applied between the metal reflective film 69 and the transparent electrode 64.

FIG. 7 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. 6, since the metal reflection film 69 also functions as a liquid crystal driving electrode and a reflection scattering film, each pixel portion (voltage is applied to the interposed 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. 7 in which the metal reflection film 79 (scattering film) is provided on the back surface of the rear substrate, a part of the light incident on the non-pixel portion is not reflected. 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. 7, 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. By providing a function of condensing as much of the external light as possible among the external light incident on the observer at the observer's position, it is possible to provide a reflective liquid crystal display device that has high light use efficiency and can display a bright screen. is there.

[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 rear substrate on which a light reflection film and a transparent electrode for driving liquid crystal corresponding to the transparent electrode are laminated on a transparent substrate; a liquid crystal sandwiched between the two substrates; and a light disposed between the two substrates. In a reflective liquid crystal display device having at least a scattering film, the light scattering film is composed of a plurality of microlenses and a flattening layer covering the microlenses, and the microlenses at least overlap the pixel portion in a plan view. As described above, a reflection type liquid crystal display device is formed in a non-pixel portion.

The above-mentioned transparent electrodes may have any known shape, and may have any appropriate shape according to a 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 reflective liquid crystal display device having such a configuration, light incident on the non-pixel portion from the observer side is refracted by the microlens 2 formed on the observer side substrate as shown in FIG. Then, the light enters the pixel portion, and is thereafter reflected by the metal reflection film 9 formed on the rear substrate,
It is emitted from the observer side 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, as shown in FIG. After entering the department,
It is 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. Of the light incident on the reflection type liquid crystal display device, nearly 100% of the light can be used for screen display, and the observer can observe a bright screen display.

Here, in order to refract the light incident on the non-pixel portion and make it incident on the pixel portion, the width of the microlens formed in the non-pixel portion so as to overlap with the pixel portion is changed. It is necessary to make the width wider than the width and to position the center of the microlens in the pixel portion. That is, the inventions according to claims 2 and 3 specify a configuration of a microlens for efficiently condensing light incident on a non-pixel portion to the pixel portion.

That is, the invention according to claims 2 and 3 is based on the reflection type liquid crystal display device according to the invention of claim 1, and efficiently transmits light incident on the non-pixel portion from the observer side. Micro-lenses located in the non-pixel portion so as to overlap with the pixel portion (that is, micro-lenses formed over the non-pixel portion and the pixel portion) have a pitch wider than the width of the non-pixel portion. This is a reflection type liquid crystal display device characterized by being formed. A reflective liquid crystal display, wherein a lens center of a microlens located in a non-pixel portion so as to overlap with the pixel portion is formed so as to enter one pixel portion of the overlapping pixel portion. It is a device.

Next, in the light scattering film composed of the microlens and the flattening layer covering the microlens, the refractive index of the microlens and the refractive index of the flattening layer are different 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 that has entered the non-pixel portion to the pixel portion, it is necessary to refract the light that has passed through the non-pixel portion and incident on the microlens, and focus the light on 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 4 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.

Next, as a material having a high refractive index to be a microlens, a material having a high light transmittance and a high refractive index and a material having a small wavelength dispersion in a 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,
An organic silicate having a refractive index of 1.46 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 1.48). Examples of the fluorine-based resin include tetrafluoroethylene and hexafluoropropylene copolymers (refractive index: 1.34) and fluorine-based acrylic resins (refractive index: 1.34 to 1.34). 40) can be applied.

Next, as the shape of the micro lens,
It is desirable that the surface shape be a shape that forms part of a spherical surface (a so-called convex lens shape). 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.

When emphasis is placed on increasing the filling ratio of the microlenses and improving the productivity of the microlenses, the planar shape of the bottom surface of the microlenses may be a quadrangle (for example, a rectangle or a square) or a hexagon. It may be a polygon. 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, as a means for forming a microlens using the above-mentioned organic resin or the like, for example, a printing method can be used. In addition, the organic resin is composed of a photosensitive resin, and the photosensitive resin is applied, for example, on a reflective film of a rear substrate to form a film, and thereafter, a predetermined pattern exposure and development are performed. The photosensitive resin is left in a predetermined portion including the non-pixel portion. 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 forming the microlenses, the microlenses may be formed also in the pixel portions to impart light scattering properties. At that time, the shapes of the microlenses formed in the pixel portions are formed in the non-pixel portions. It may be different from the shape of the microlens.

Next, as a transparent substrate serving as a base of the observer-side substrate and the rear-side substrate, a plastic film, a plastic plate, or the like can be used in addition to a glass plate. Also, the light passing through each pixel portion is applied to the transparent substrate with a corresponding color (for example, R (red) color, G (green) color,
(Blue) color, a color display is possible as a reflective 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 5 is based on the reflection type liquid crystal display device according to claims 1 to 4, 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 guide light incident on the non-pixel portion of the observer-side substrate from the observer side to the pixel portion, the light scattering film is formed with a micro lens. And a flattening layer covering the microlenses. Further, the width of the microlens formed near the non-pixel portion (the microlens formed over the pixel portion and the non-pixel portion) is made wider than the width of the non-pixel portion, and the lens center of the microlens is set at the pixel. It is an array that enters the department. Furthermore, the refractive index of the microlens is set higher than the refractive index of the flattening layer. Note that when the microlens overlaps with a plurality of pixel portions, the lens center of the microlens is arranged in one of the overlapping pixel portions.

With the reflection type liquid crystal display device having such a configuration, light incident on the non-pixel portion of 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.

Also, the scattered light distribution can be easily controlled by appropriately changing the lens shape of the microlenses constituting the light scattering film and the refractive index difference from the flattening layer.
Application to reflective liquid crystal display devices with different pixel pitches, etc.
Can respond to various needs.

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, by performing heating after performing predetermined pattern exposure and development,
The photosensitive acrylic resin remaining on the glass substrate 1 is melted and deformed into a microlens shape having a spherical surface due to its surface tension.

At this time, as shown in FIG. 3, the microlens 2 formed over the pixel portion and the non-pixel portion is formed as shown in FIG. 3 and FIG. 4, which is a cross-sectional view taken along line XX ′ of FIG. , The lens center of the microlens 2 is arranged in the pixel portion. Further, the diameter of the microlens 2 was larger than the width of the non-pixel portion. Incidentally, in the first embodiment, the width of the non-pixel portion is about 10 μm, and the pixel portion (rectangular shape)
Is 90 μm × 290 μm, and the shape of the microlens 2 is such that the diameter of the bottom surface is about 30 μm and the thickness is about 1.5 μm. The plurality of microlenses 2 having the same shape were arranged and formed on the entire surface of the pixel portion and the non-pixel portion.

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.

FIG. 5 shows the data of the viewing angle and the brightness of the display screen of the reflection type liquid crystal display device according to the first embodiment by a solid line A. In the graph of FIG. 5, the horizontal axis represents the viewing angle (°) of the display screen of the reflective liquid crystal display device, and the vertical axis represents the brightness of the display screen. For reference, the relationship between the viewing angle and the brightness of a conventional reflective liquid crystal display device in which a scattering film is not formed in a non-pixel portion is shown by a dotted line B in FIG. As shown in FIG. 5, the reflection-type liquid crystal display device according to the first embodiment has an improvement in the light intensity of the display screen by about 8% at a practically required viewing angle as compared with the conventional reflection-type liquid crystal display device. are doing.

<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 a position aligned on 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.

The embodiments of the present invention have 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.

[0045]

As described above, in the reflection type liquid crystal display device according to the present invention, the light scattering film is constituted by the micro lens and the flattening layer, and at least the micro lens is formed by the pixel portion and the non-pixel portion. Is formed in the non-pixel portion so as to extend over the non-pixel portion. For this reason, light that has entered the non-pixel portion of the observer-side substrate from the observer side is guided to the pixel portion by the light scattering film, or is reflected by the light reflection film and then guided to the pixel portion by the light scattering film. Will be crushed. Thereby, in the reflection type liquid crystal display device according to the present invention, a bright display screen can be observed.

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. .

[0047]

[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 an explanatory sectional view showing an example of an optical path of light incident on a reflection type liquid crystal display device of the present invention.

FIG. 5 is a graph showing an example of a change in brightness of a display screen due to a change in a viewing angle of the reflective liquid crystal display device of the present invention.

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

FIG. 7 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 FA02X FA29X FA29Z FA31X FA31Z FA37Z FB02 FC02 FC10 FC22 FD02 LA16

Claims (5)

[Claims] An observer-side substrate on which a transparent electrode for driving liquid crystal is disposed on a transparent substrate, and a back surface on which a light reflecting film and a transparent electrode for driving liquid crystal corresponding to the transparent electrode are laminated on the transparent substrate. In a reflective liquid crystal display device having at least a side substrate, a liquid crystal sandwiched between the two substrates, and a light scattering film provided between the two substrates, the light scattering film includes a plurality of microlenses and microlenses. And a flattening layer covering the pixel portion, wherein the microlens is formed at least in the non-pixel portion so as to overlap the pixel portion in a plan view. 2. A microlens formed in a non-pixel portion so as to overlap with the pixel portion is formed at a pitch wider than a width of the non-pixel portion. Reflective liquid crystal display. 3. A lens center of a micro lens formed in a non-pixel portion so as to overlap with the pixel portion,
3. The reflection type liquid crystal display device according to claim 1, wherein the reflection type liquid crystal display device is formed so as to enter one pixel portion of the overlapping pixel portions. 4. 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. 5. The reflection type liquid crystal display device according to claim 1, wherein the color filter is disposed on one of the observer side substrate and the back side substrate.