JP2002229048A - Liquid crystal display and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the orientation defects of liquid crystal molecules which becomes the cause for light leakage. SOLUTION: The liquid crystal display device has an array substrate and a counter substrate and liquid crystal layers grasped as the cells of a liquid crystal composition between the array substrate and the counter substrate; the array substrate includes pixel electrodes 25, having reflection conductive layers 25R and transmission conductive layers 25T arranged as windows W for the reflection conductive layers 25R as well alignment layers for covering the reflection conductive layers 25R and the transmission conductive layers 25T. The windows W of the reflection conductive layers 25R are a rectangular shape, having the longitudinal direction approximately aligned to the rubbing direction of the alignment layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device in which a liquid crystal layer is sandwiched between a pair of electrode substrates as a cell of a liquid crystal composition, and a method of manufacturing the same. And a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, lightweight, small, and high-definition liquid crystal display devices have been actively developed in the field of information equipment such as computers and the field of video equipment such as televisions. A general liquid crystal display device has a structure in which a liquid crystal layer is sandwiched between a pair of electrode substrates, and displays an image by optically modulating light from a light source using the liquid crystal layer.

[0003] The liquid crystal display devices are classified into a transmissive type that transmits light from a backlight disposed on the back side or the side of the rear side and a reflective type that reflects light from the surroundings. In both the transmission type and the reflection type, the display image is affected by ambient light entering the liquid crystal display device. A display image of the transmission type becomes difficult to see when the ambient light is too bright, and a display image of the reflection type becomes difficult to see when the ambient light is too dark.

In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. 11-316382 discloses a method in which a light-transmitting conductive layer having a high light transmittance and a light-reflecting conductive layer having a high reflection efficiency are arranged in each pixel to transmit and reflect light. A method that uses light in combination is disclosed. In this method, one electrode substrate has a light-transmitting insulating substrate and an organic insulating film covering the insulating substrate, a light-transmitting conductive layer is disposed in an opening formed in a part of the organic insulating film, and a light reflecting A conductive layer is disposed on the organic insulating film around the light transmitting conductive layer. The light transmitting conductive layer and the light reflecting conductive layer are covered with an alignment film.

[0005]

The alignment film is rubbed in a predetermined direction with a rubbing cloth to control the alignment of liquid crystal molecules. However, since the rubbing cloth cannot rub the alignment film uniformly due to a step near the opening, light leakage due to poor alignment occurs, which results in lowering the contrast.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device and a method of manufacturing the same, which can reduce liquid crystal molecule alignment defects that cause light leakage in view of the above-mentioned problems.

[0007]

According to the present invention, there are provided first and second electrode substrates, and a liquid crystal layer sandwiched between the first and second electrode substrates as a cell of a liquid crystal composition,
The first electrode substrate includes a light reflecting portion and an electrode having a light transmitting portion disposed as a window of the light reflecting portion, and an alignment film covering the light reflecting portion and the light transmitting portion. A liquid crystal display device having a longitudinal direction substantially corresponding to the rubbing direction of the liquid crystal display device.

According to the present invention, there is further provided an electrode having a light reflecting portion and a light transmitting portion disposed as a window of the light reflecting portion;
A step of forming first and second electrode substrates each including an alignment film covering the light reflecting portion and the light transmitting portion; and forming a liquid crystal layer sandwiched between the first and second electrode substrates as a cell of a liquid crystal composition. Forming, wherein the window of the light reflecting portion has a shape having a longitudinal direction, and further comprising a step of rubbing the alignment film in a direction substantially coincident with the longitudinal direction of the window. You.

In this liquid crystal display device and the method of manufacturing the same, the window of the light reflecting portion has a shape having a longitudinal direction substantially coinciding with the rubbing direction of the alignment film, and a step formed between the light reflecting portion and the light transmitting portion is eliminated. Compensate. In this case, a region of the alignment film where the rubbing cloth cannot be sufficiently rubbed due to the step difference can be reduced as compared with a case where the longitudinal direction of the window is largely deviated from the rubbing direction of the alignment film. Therefore, high contrast can be obtained by reducing alignment defects that cause light leakage.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal display according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
This liquid crystal display device is a system that displays an image using both transmitted light and reflected light.

FIG. 1 shows a partial cross-sectional structure of a liquid crystal display device, and FIG. 2 shows a planar structure near a pixel shown in FIG. As shown in FIG. 1, this liquid crystal display device includes an array substrate AR, a counter substrate CT, and a liquid crystal layer LQ sandwiched between these substrates AR and CT.

The array substrate AR is a light-transmitting insulating substrate 2
1, a plurality of pixel electrodes 25 arranged in a matrix on the insulating substrate 21, a plurality of signal lines 13 arranged along columns of the pixel electrodes 25, and arranged along rows of the pixel electrodes 25 A plurality of scanning lines 14, each corresponding scanning line 1
A plurality of thin film transistors (TFTs) 23 arranged as pixel switching elements in the vicinity of the intersections between the pixel electrodes 4 and the corresponding signal lines 13, a driving circuit for driving the plurality of scanning lines 14 and the plurality of signal lines 13, and a plurality of pixel electrodes 25 Is included. The counter substrate CT includes a light-transmissive insulating substrate 22 and a color filter 24 formed on the insulating substrate 22 as red, green, and blue stripes arranged in the row direction in opposition to the pixel electrodes 25 in the corresponding columns. And a transparent counter electrode 29 covering the color filter 24, and an alignment film 27B covering the counter electrode 29. Further, the phase difference plate RT1 and the polarizing plate PL1 are attached to the insulating substrate 21 on the side opposite to the plurality of pixel electrodes 25, and the phase difference plate RT2 and the polarizing plate PL2 are attached to the insulating substrate 22 on the side opposite to the color filter 24. Pasted.

In this liquid crystal display device, the liquid crystal layer LQ has a plurality of pixel regions PX corresponding to the plurality of pixel electrodes 25, respectively.
, And each pixel area PX has two adjacent scanning lines 1
4 and two adjacent signal lines 13. Each thin film transistor 23 supplies the potential of the corresponding signal line 13 to the corresponding pixel electrode 25 in response to a scanning pulse supplied from the corresponding scanning line 14. Each pixel electrode 25 applies the potential of the corresponding signal line 13 as a pixel potential to the corresponding pixel region PX of the liquid crystal layer LQ, and controls the transmittance of the pixel region PX based on the potential difference between this pixel potential and the potential of the counter electrode 29. I do. Each pixel electrode 25 has a reflective conductive layer 25R made of a metal such as silver, aluminum, or an alloy thereof, and a transparent conductive layer 25T such as ITO disposed as a window W of the reflective conductive layer 25R. The reflective conductive layer 25R is made of a counter substrate CT.
A light reflecting portion that reflects and scatters light incident from the side via the liquid crystal layer LQ with high reflectance is configured, and the transmissive conductive layer 25T transmits light incident from the back surface of the array substrate AR to the liquid crystal layer LQ side. Construct a transmission part. Window W of reflective conductive layer 25R
Is a rectangle having a longitudinal direction substantially coinciding with the rubbing direction of the alignment film 27A.

In the array substrate AR, a plurality of thin film transistors 23, a plurality of reflective conductive layers 25T, and other wiring are formed on the light-transmitting insulating substrate 21 and are covered with the organic insulating film 31 together with the insulating substrate 21. This organic insulating film 31 has a plurality of openings 31 each partially exposing corresponding transmission conductive layer 25T.
H and a plurality of concavo-convex patterns arranged corresponding to the plurality of pixel regions PX so as to surround the openings 31H. Each thin film transistor 23 has a gate connected to the corresponding scanning line 14, a source connected to the transmission conductive layer 25T of the corresponding pixel electrode 25, and a drain connected to the corresponding signal line 13. The reflective conductive layer 25R of each pixel electrode 25 is formed on the organic insulating film 31 in contact with the outer edge of the corresponding transmissive conductive layer 25T. The reflective conductive layer 25R is formed with a predetermined thickness along the concave / convex pattern of the organic insulating film 31, and has a plurality of hemispherical convex portions 25RA arranged at random and concave portions arranged around these hemispherical convex portions 25RA. 25 RB is included as the concavo-convex pattern. This reflective conductive layer 2
5R reflects incident light by this concavo-convex pattern so as to be scattered.

Next, the manufacturing process of the above-mentioned liquid crystal display device will be described.

In manufacturing the array substrate AR, a plurality of thin film transistors 23, a plurality of transmissive conductive layers 25T, and other wiring are repeatedly formed and patterned in a usual manner to form a light transmissive insulating substrate such as a high strain point glass plate or a quartz plate. 21 is formed. Subsequently, for example, a positive photosensitive resin having a thickness of 1 μm to 4 μm covering the entire insulating substrate 21 by spin coating or the like.
It is applied as an organic insulating film 31 of about μm. After the pre-baking of the insulating substrate 21, the organic insulating film 31 is partially exposed in a range corresponding to the plurality of openings 31H using a photomask for opening, and furthermore, each pixel region is not overlapped with the signal lines 13 and the scanning lines 14. Exposure is performed using a concavo-convex pattern photomask having a plurality of circular light-shielding portions arranged at random pitches in the range of PX. Here, the exposure amount for the concavo-convex pattern is set to 10 to 200 mJ, the exposure amount for the opening is set to 200 to 2,000 mJ, and the diameter of the circular light shielding portion is set to about 2 to 20 μm. The undulating shape and density of the concavo-convex pattern are controlled by the opening shape, density, exposure amount, and the like of the photomask.

Subsequently, the organic insulating film 31 is developed to remove the above-mentioned exposed portions, whereby a plurality of openings 31 are formed.
With H, an uneven pattern of the organic insulating film 31 is formed. At this stage, since the concavo-convex pattern has an acute undulation, the heat treatment of the insulating substrate 21 is performed so as to make the concavo-convex pattern smooth with sharp corners.

Subsequently, a metal film such as Al, Ni, Cr, and Ag is deposited on the organic insulating film 31 to a thickness of about 100 nm by a sputtering method, and is patterned into a predetermined shape by a photo etching method. A plurality of reflective conductive layers 25 contacting the outer edge of the corresponding transparent conductive layer 25T
Form R.

Subsequently, a plurality of columnar spacers 15 are formed in a predetermined region in order to secure a predetermined gap corresponding to the thickness of the liquid crystal layer LQ. About 3 μm is applied so as to cover the insulating film 31, and this is applied to the window W of the reflective conductive layer 25R.
(Ie, the direction in which the step between the reflective conductive layer 25R and the transmissive conductive layer 25T extends the longest).

On the other hand, in the manufacture of the counter substrate CT, a color filter 24 in which a pigment or the like is dispersed is formed on a light-transmitting insulating substrate 22 such as a glass plate or a quartz plate having a high strain point. The transparent counter electrode 29 is formed, for example, by depositing 1TO on the coloring layer 24 by a sputtering method. Subsequently, the alignment film 27
B is formed by applying a low-temperature cure type polyimide by printing to a thickness of about 3 μm so as to cover the transparent counter electrode 29, and subjecting this to a rubbing treatment with a rubbing cloth. In the rubbing treatment of the alignment film 27B, the alignment axis is aligned with the alignment film 27A so that the liquid crystal molecules of the liquid crystal layer LQ have a substantially homogeneous arrangement. The array substrate AR and the counter substrate CT are integrated after forming the alignment films 27A and 27B. Specifically, the array substrate AR and the counter substrate CT are
A and 27B face each other, and are bonded together via a peripheral sealing material that is an epoxy-based thermosetting resin adhesive. The liquid crystal layer LQ is formed by using a liquid crystal injection space surrounded by a peripheral sealing material between the array substrate AR and the counter substrate CT as a cell, injecting a liquid crystal composition such as a nematic liquid crystal into the cell, and sealing the cell with an ultraviolet curing resin. can get. With the liquid crystal layer LQ thus sandwiched between the array substrate AR and the counter substrate CT, the retardation plate RT1 and the polarizing plate PL1 are attached to the insulating substrate 21 on the side opposite to the plurality of pixel electrodes 25, and the retardation plate RT2 and the polarizing plate PL2 are attached to the insulating substrate 22 on the side opposite to the color filter 24. The liquid crystal display device is completed as described above.

According to the liquid crystal display device of the first embodiment described above, the window W of the reflective conductive layer 25R has the organic insulating film 3 between the reflective conductive layer 25R and the transmissive conductive layer 25T as shown in FIG.
1 so as to compensate for the step caused by the thickness of
Is a rectangle having a longitudinal direction substantially corresponding to the rubbing direction. Assuming that the longitudinal direction of the window W and the rubbing direction of the alignment film 27A are expressed in, for example, a 12-hour clock format, when the longitudinal direction of the window W is set to a direction of 6 o'clock to 12 o'clock parallel to the signal line 13, The rubbing direction of the alignment film 27A is also 6: 00-12.
Set to the hour direction. When such a liquid crystal display device was actually driven, it was confirmed by microscopic observation that an alignment defect region having a width of about 4 μm was generated along one short side of the window W as shown in FIG. . However, in the visual observation, both the transmitted light display image and the reflected light display image were of high quality. In particular, in the case of transmitted light display, a contrast of 350 could be obtained.

As a first comparative example, a liquid crystal display similar to that of the first embodiment, except that the rubbing direction of the alignment film 27A is changed to a direction of 7: 30-1: 30 and a direction of 9: 30-3: 00. An apparatus was manufactured and an experiment for actually driving the apparatus was performed. Then, when the rubbing direction is the direction of 7: 30-1: 30,
Microscopic observation confirmed that the misalignment region occurred along both one long side and one short side of the window W as shown in FIG. 3B. At this time, when the contrast was measured, the result was 280. On the other hand, when the rubbing direction was from 9 o'clock to 3 o'clock, it was confirmed by microscopy that a poorly-aligned region was generated along one long side of the window W as shown in FIG. At this time, when the contrast was measured, the result was 260. That is,
If the rubbing direction of the alignment film 27A greatly deviates from the longitudinal direction of the window W, the length of the poorly-aligned region in which the rubbing cloth is not sufficiently rubbed due to the influence of the step increases. Therefore, a high contrast exceeding 300 cannot be obtained due to the light leakage corresponding to the poor alignment region.

As a second comparative example, a first comparative example was adopted except that the alignment film 27B on the counter substrate CT side was changed to a vertical alignment film without rubbing treatment to obtain a hybrid liquid crystal alignment.
A liquid crystal display device similar to that of the embodiment was manufactured, and an experiment of actually driving the same was performed. Then, when the rubbing direction of the alignment film 27A is also set to the direction of 6 o'clock to 12 o'clock, a tendency similar to the above-described result that the highest contrast is obtained is obtained. Although the hybrid liquid crystal array is used in this comparative example, a TN liquid crystal array may be used.

Next, a liquid crystal display according to a second embodiment of the present invention will be described. FIG. 4 shows a partial cross-sectional structure of the liquid crystal display device, and FIG. 5 shows a planar structure near the pixel shown in FIG. This liquid crystal display device is configured similarly to the first embodiment except for the following. Therefore, FIGS. 4 and 5
In FIG. 7, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

This liquid crystal display does not have the transmissive conductive film 25T as shown in FIG. Instead, the light transmitting portion is constituted by three notches 25TC formed in the reflective conductive layer 25R as the window W of the light reflecting portion. This notch 25TC
Are driven by utilizing a leakage electric field generated at the edge of the reflective conductive layer 25R. For this reason, each opening 31H of the organic insulating film 31 is formed not as an exposure of the transmissive conductive film 25T but as a contact hole for connecting the corresponding reflective conductive layer 25R to the source of the corresponding thin film transistor 23. Each notch 25TC is a rectangle having a size of 4 μm in width × 50 μm in length. The longitudinal direction of this rectangle substantially coincides with the rubbing direction of the alignment film 27A as shown in FIG. Next, an array substrate A different from the first embodiment
The manufacturing process of R will be described. In the manufacture of the array substrate AR,
A plurality of thin film transistors 23 and other wirings are formed on the light transmitting insulating substrate 21 such as a high strain point glass plate or a quartz plate by repeating normal film formation and patterning. Subsequently, for example, a positive photosensitive resin is applied as an organic insulating film 31 having a thickness of about 1 μm to 4 μm covering the entire insulating substrate 21 by spin coating or the like. After the pre-baking of the insulating substrate 21, the organic insulating film 31 is partially exposed in a range corresponding to the plurality of openings 31 H using a photomask for opening, and furthermore, each pixel region is not overlapped with the signal lines 13 and the scanning lines 14. Exposure is performed using a concavo-convex pattern photomask having a plurality of circular light-shielding portions arranged at random pitches in the range of PX. Here, similarly to the first embodiment, the exposure amount for the concavo-convex pattern is set to 10 to 200 mJ, the exposure amount for the opening is set to 200 to 2000 mJ, and the diameter of the circular light shielding portion is set to about 2 to 20 μm. . The undulating shape and density of the concavo-convex pattern are controlled by the opening shape, density, exposure amount, and the like of the photomask.

Subsequently, the organic insulating film 31 is developed to remove the above-mentioned exposed portions, thereby forming a concave / convex pattern of the organic insulating film 31 together with a plurality of openings 31H each exposing the source of the corresponding thin film transistor 23. At this stage, since the concavo-convex pattern has an acute undulation, the heat treatment of the insulating substrate 21 is performed so as to make the concavo-convex pattern smooth with sharp corners.

Subsequently, a metal film such as Al, Ni, Cr and Ag is deposited on the organic insulating film 31 to a thickness of about 100 nm by a sputtering method, and a predetermined etching shown in FIG. Is formed, whereby a plurality of reflective conductive layers 25R each having three notches 25TC and being in contact with the source of the corresponding thin film transistor 23 are formed.

Subsequently, a plurality of columnar spacers 15 are formed in a predetermined area in order to secure a predetermined gap corresponding to the thickness of the liquid crystal layer LQ. 5 μm is applied so as to cover the insulating film 31, and this is applied in the longitudinal direction of the window W of the reflective conductive layer 25 R as shown in FIG. 5 (that is, the direction in which the step between the light reflecting portion and the light transmitting portion extends the longest). It is formed by performing a rubbing process with a rubbing cloth in a rubbing direction that matches.

Thereafter, the steps of manufacturing the counter substrate CT and the step of integrating the array substrate AR and the counter substrate CT are performed in the same manner as in the first embodiment.

According to the above-described liquid crystal display device of the second embodiment, the notch 25TC of the reflective conductive layer 25R is formed as the window W of the light reflecting portion, and the window W reflects the light between the light reflecting portion and the light transmitting portion. It is a rectangle having a longitudinal direction substantially coinciding with the rubbing direction of the alignment film 27A so as to compensate for a step caused by the thickness of the conductive layer 25R. That is, when the longitudinal direction of the window W is set to the direction of 7: 30-1: 30, the alignment film 27
The rubbing direction of A is also set to the direction of 7: 30-1: 30. In this case, the area of the alignment film 27A where the rubbing cloth cannot be sufficiently rubbed due to the step difference can be reduced as compared with the case where the longitudinal direction of the window W is largely deviated from the rubbing direction of the alignment film 27A. Therefore, high contrast can be obtained by reducing alignment defects that cause light leakage. When such a liquid crystal display device was actually driven, a high-quality display image was confirmed by visual observation. In the transmitted light display, 2
A contrast of 0 was obtained. In particular, when the plurality of notches 25TC are formed with a width of 10 μm or less, it is possible to greatly improve the contrast that is reduced due to light leakage due to poor alignment.

As a third comparative example, a liquid crystal display device similar to the second embodiment except that the rubbing direction of the alignment film 27A is changed to the direction of 6 o'clock to 12 o'clock and the direction of 9 o'clock to 3 o'clock. An experiment was conducted to manufacture and actually drive this. Then, when the rubbing direction is the direction from 6 o'clock to 12 o'clock, the contrast becomes 8 in transmitted light display. On the other hand, when the rubbing direction is from 9 o'clock to 3 o'clock, the contrast becomes 6 in transmitted light display. Therefore, the contrast of the transmitted light display exceeding 20 obtained in the second embodiment cannot be obtained due to the light leakage corresponding to the poor alignment region.

The present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof. For example, the cutout portion 25TC of the second embodiment is not rectangular, and may be another shape having a longitudinal direction such as an elliptical shape. Further, the number of cutouts 25TC may be changed to a number other than three.

[0033]

As described above, according to the present invention, it is possible to provide a liquid crystal display device and a method for manufacturing the same, which can reduce defective alignment of liquid crystal molecules which causes light leakage.

[Brief description of the drawings]

FIG. 1 is a diagram showing a partial cross-sectional structure of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a planar structure near a pixel illustrated in FIG. 1;

FIG. 3 is a view for explaining the reason why the longitudinal direction of the window shown in FIG. 1 is matched with the rubbing direction of the alignment film.

FIG. 4 is a diagram showing a partial cross-sectional structure of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a planar structure near a pixel shown in FIG. 4;

[Explanation of symbols]

 25: Pixel electrode 25T: Transmissive conductive layer 25R: Reflective conductive layer 25TC: Notch 27A: Alignment film AR: Array substrate CT: Counter substrate LQ: Liquid crystal layer PX: Pixel area W: Window

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Yoshitaka Yamada, Inventor Yoshitaka Yamada, 1-9-9, Hara-cho, Fukaya-shi, Saitama Prefecture Toshiba Fukaya Plant Co., Ltd. (72) Inventor Yasuyuki Hanazawa 1-9-9, Harara-cho, Fukaya-shi, Saitama No.2 F-term in Toshiba Fukaya Plant (reference) 2H090 HB08Y KA05 LA06 LA09 LA15 MB01 MB03 2H091 FA02Y FA08X FA08Z FA11X FA11Z FA14Z FC26 FD06 GA13 HA07 LA17 2H092 JA24 JA41 MA13 NA25 PA02 PA08 PA10 PA11

Claims (9)

[Claims] 1. A semiconductor device comprising: a first electrode substrate; a second electrode substrate; and a liquid crystal layer sandwiched between the first and second electrode substrates as a cell of a liquid crystal composition. An electrode having a light transmitting portion disposed as a window of the light reflecting portion; and an alignment film covering the light reflecting portion and the light transmitting portion, wherein the window of the light reflecting portion has a length substantially coinciding with a rubbing direction of the alignment film. A liquid crystal display device having a shape having a direction. 2. The light-reflecting portion is formed by a reflective conductive layer that reflects incident light, and the light-transmitting portion is formed by at least one transmitting conductive layer that transmits incident light. 2. The liquid crystal display device according to 1. 3. The transmission conductive layer is formed on a light-transmitting insulating substrate, and the reflective conductive layer is formed on an insulating film that exposes each transmission conductive layer and covers the insulating substrate. The liquid crystal display device according to claim 2. 4. The light reflecting portion is constituted by a reflective conductive layer that reflects incident light, and the light transmitting portion is constituted by at least one cutout formed in the reflective conductive layer so as to transmit the incident light. The liquid crystal display device according to claim 1, wherein: 5. The liquid crystal display device according to claim 4, wherein the notch has a width of 10 μm or less in a direction perpendicular to the longitudinal direction. 6. The second electrode substrate includes a counter electrode facing the electrode and an alignment film covering the counter electrode, and a rubbing direction of the alignment film of the second electrode substrate is predetermined according to a liquid crystal molecule arrangement of the liquid crystal layer. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is determined based on a rubbing direction of the alignment film of the first electrode substrate so as to have a twist. 7. The liquid crystal display device according to claim 2, wherein the reflective conductive layer has an uneven pattern for scattering reflected light. 8. The liquid crystal display device according to claim 7, wherein the concave / convex pattern depends on undulations of a base of the reflective conductive layer. 9. A first and a second electrode each including an electrode having a light reflecting portion and a light transmitting portion disposed as a window of the light reflecting portion, and an alignment film covering the light reflecting portion and the light transmitting portion.
A step of forming an electrode substrate; and a step of forming a liquid crystal layer sandwiched between the first and second electrode substrates as a cell of a liquid crystal composition, wherein the window of the light reflecting portion has a shape having a longitudinal direction. A method of manufacturing a liquid crystal display device, further comprising a step of rubbing the alignment film in a direction substantially coincident with a longitudinal direction of the window.