JP2003005169A - Color liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflective color liquid crystal display device gaining light scattering characteristics with sufficient reflected light intensity in all directions of observation. SOLUTION: In the reflective liquid crystal display device C, a group 8 of striped transparent electrodes and an alignment layer 10 are successively formed on a glass substrate 2 and a light reflection layer 16 and a light scattering layer are formed on a glass substrate 1 where the surface of the light scattering layer is formed as a projecting array group 18. A light semitransmissive film 19, a color filter 5, an overcoat layer 6, a group 7 of striped transparent electrodes and an alignment layer 9 are formed on the projecting array group 18. The one member (the glass substrate 2) and the other member (the glass substrate 1) are stuck to each other via a liquid crystal layer 11 with a sealing member 12 so as to make the groups 8, 7 of the striped transparent electrodes intersect each other (orthogonal). A first optical retardation plate 13, a second optical retardation plate 14, both composed of polycarbonate, and an iodine type polarizing plate 15 are successively laminated on the outside of the glass substrate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a reflective type color liquid crystal.
The present invention relates to a display device. [0002] 2. Description of the Related Art In recent years, liquid crystal display devices are small or medium sized.
In addition to portable information terminals and laptop computers,
It is used even for small monitors. Special emphasis on portability
Equipment, such as thin, lightweight, low power consumption, etc.
Liquid crystal display without backlight for display
Has been proposed. In such a reflective liquid crystal display device, a battery
In order to obtain a bright display without using a light,
Light with a wide scattering angle for incident light from different angles
Need to be fired.
Has been issued. FIG. 2 shows a reflection formed by forming a color filter.
FIG. 10 is an enlarged view of a main part of a liquid crystal display device A (Japanese Patent Application Laid-Open
00-131885). According to the reflection type color liquid crystal display device A,
For example, 1 is a common side glass substrate and 2 is a segment side glass substrate.
Glass substrate 2 and a large number of
And a striped transparent electrode group 8 made of ITO
Orientation film 10 made of polyimide resin rubbed in the
Are sequentially formed. Further, a transparent resin is formed on the glass substrate 1.
Forming a convex array group 3 in which a plurality of convex portions are randomly arranged
Then, the surface of this convex array group is
Forming a light reflection layer 4 made of a metal such as metal;
Over color filter 5 and acrylic resin
-A coat composed of a coating layer 6 and a number of ITOs arranged in parallel.
Forming a tripe-shaped transparent electrode group 7 and further forming a stripe
Rubbed in a certain direction on the transparent electrode group 7
An alignment film 9 made of resin is formed. The glass substrate 2 and the glass substrate
Is twisted at an angle of, for example, 200 to 260 °.
Through a liquid crystal layer 11 made of chiral nematic liquid crystal
As a result, both stripe-shaped transparent electrode groups 7 and 8 intersect (directly).
Are bonded together by the seal member 12 so as to intersect.
Although not shown, a liquid is interposed between the glass substrates 1 and 2.
Many spacers are arranged to keep the thickness of the crystal layer 11 constant.
are doing. Further, polycarbonate is provided on the outside of the glass substrate 2.
The first retardation plate 13, the second retardation plate 14,
The urine-based polarizing plates 15 are sequentially stacked. these
When arranging, use an adhesive made of acrylic material.
Paste by applying. In the reflection type color liquid crystal display device A having the above-described structure,
Light from external lighting such as sunlight, fluorescent lights, etc.
Are a polarizing plate 15, a second retardation plate 14, a first retardation plate 13,
The light sequentially passes through the glass substrate 2 and the incident light
Transparent electrode group 8, alignment film 10, liquid crystal layer 11, and further alignment
Film 9, stripe-shaped transparent electrode group 7, and overcoat layer 6
Reaches the light reflection layer 4 through the color filter 5 and
The light is scattered and reflected by the
, Liquid crystal layer 11, first retardation plate 13, second retardation plate 1
4. Light is emitted through the polarizing plate 15 and the like. As described above, the conventional reflection type color liquid crystal display device is used.
According to the arrangement A, the convex shape due to the resin formed in the liquid crystal cell
By forming the reflective layer 4 on the array group 3, reflection of incident light
And scatter the incident light from all angles.
In contrast, light is emitted with a wide scattering angle. The reflection type color liquid crystal display device A having the configuration described above
Besides, a reflection type color liquid crystal display device B is also proposed.
(See JP-A-11-323196). FIG. 3 shows a reflection formed by forming a color filter.
FIG. 2 is an enlarged view of a main part of a color liquid crystal display device B. According to the reflection type color liquid crystal display device B, the gas
A string composed of a large number of ITOs arranged in parallel on the glass substrate 2
A transparent transparent electrode group 8 and a rubbed poly
An alignment film 10 made of an imide resin is sequentially formed;
Aluminum on the glass substrate 1 by sputtering
Light reflecting layer 16 made of metal and transparent resin made of acrylic resin
Light scattering layer 17 in which transparent fine particles are dispersed in resin and color
I arranged in parallel with many filters 5 and overcoats 6
The stripe-shaped transparent electrode group 7 made of TO
Forming an alignment film 9 made of polyimide resin
I have. Then, the glass substrate 2 and the glass substrate 1 are
Bonded by seal member 12 via liquid crystal layer 11
You. Although not shown, between the two glass substrates 1 and 2
Means that many spacers are used to keep the thickness of the liquid crystal layer 11 constant.
They are arranged individually. Further, polycarbonate is provided outside the glass substrate 2.
Phase difference plate 13, second phase difference plate 14,
Elementary polarizing plates 15 are sequentially stacked. The reflection type color liquid crystal display device B having the above-described structure is used.
Light from external lighting such as sunlight, fluorescent lights, etc.
Are polarizers 15 and first retardation plate 14, and second retardation plates 13 and
Sequentially passes through the glass substrate 2 and the incident light is striped.
Transparent electrode group 8, alignment film 10, liquid crystal layer 11, and alignment film
9, stripe-shaped transparent electrode group 7, overcoat 6,
To the reflection layer 16 through the color filter 5 and the light scattering layer 17.
Reached, then reflected, and the reflected light is again colored
Filter 5, liquid crystal layer 11, first retardation plate 13, second retardation
The light is emitted through the plate 14, the polarizing plate 15, and the like. The reflection type color liquid crystal display device B having the above configuration is used.
In this case, the reflection layer 16 is arranged inside the liquid crystal cell and
Reflects light and further diffuses light by the light scattering layer 17.
Disturb, thereby reducing incident light from all angles.
Light is emitted at a wide scattering angle. [0018] SUMMARY OF THE INVENTION However, the reflection type
In the color liquid crystal display device A, the degree of light scattering is large.
The reflection component in the specular reflection direction becomes too small,
There is a problem that the display in a specific direction becomes dark.
On the other hand, in the reflection type color liquid crystal display device B, the light scattering
Because the degree of disturbance is not large and there are many specular reflection components,
Display is more specular than that of the color LCD
There is a problem of getting around. In view of the above circumstances, the present inventor has made intensive studies.
As a result, the structure having the features of the above devices A and B
Developed a projection type color liquid crystal display device.
For observation from all angles, which is difficult alone
Light scattering characteristics with adequate light reflection intensity
And found. The present invention has been completed based on the above findings.
And its purpose is sufficient for observation from all directions
-Performance and high-quality reflective color liquid with high light reflection intensity
An object of the present invention is to provide a crystal display device. [0021] SUMMARY OF THE INVENTION A color liquid crystal display according to the present invention.
The device consists of a stripe-shaped transparent electrode group and an alignment layer on a transparent substrate.
And a member having light reflectivity.
Made of photosensitive transparent resin with transparent fine particles dispersed on a plate
Form a light-scattering layer, and on this light-scattering layer, made of transparent resin
A convex array group formed by arranging a plurality of convex portions is formed.
Light transflective film, color filter and over on convex array
-Coat layer, stripe-shaped transparent electrode group and alignment layer
The other member formed by lamination is connected to both striped transparent electrodes.
Bonded through a nematic liquid crystal so that the pole groups cross
And arrange the pixels in a matrix.
Features. According to the present invention, an external light beam entering the apparatus is
When the light is scattered and reflected, the light
Light is scattered in the direction deviating from the specular reflection direction by the light translucent film
A light scattering substrate and light scattering
It has the function of scattering light to the part close to regular reflection by the turbulent layer.
At any angle by combining both scattered reflection components
Sufficient light reflection intensity for these observations
You. [0022] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
You. FIG. 1 shows a reflection type color liquid crystal display device of the present invention.
It is a principal part expanded sectional view of C. In the reflection type liquid crystal display device C, 2 is
The segment side glass substrate which is a transparent substrate, 1 is the light
A common-side glass substrate that is a reflective substrate
As for the one member, many flat members are placed on the glass substrate 2.
Striped transparent electrode group 8 composed of ITO arranged in rows
And a polyimide resin rubbed in a certain direction.
The facing film 10 is sequentially formed. The other member is placed on the glass substrate 1.
Of light from aluminum metal by sputtering
Forming a light emitting layer 16 and dispersing transparent fine particles on the light reflecting layer 16
The light scattering layer is formed of the photosensitive transparent resin
You. In addition, the surface of this light scattering layer is used for photolithography.
Therefore, a plurality of irregularities are formed.
The convex portions are arranged, thereby forming a convex array group 18.
ing. According to the convex array group 18, the light scattering layer
Although it has an integrated structure, it is distinguished from the light scattering layer,
Is formed, and then the convex array group 18 is formed on the light scattering layer.
May be formed. Next, semi-transparent light is applied to the uneven surface of the convex array group 18.
A color filter formed by forming an overcoat 19 and further arranged for each pixel.
Chrome metal placed between the filter 5 and each color filter 5
Or a black matrix of a photosensitive resist (not shown).
Zu). An acrylic tree is placed on the color filter 5.
Arranged in parallel with many overcoat layers 6 made of grease
And a striped transparent electrode group 7 made of ITO
Then, the stripe-shaped transparent electrode group 7 is
Forming an alignment film 9 made of polyimide resin
I have. Then, one of these members (glass substrate 2)
And the other member (glass substrate 1) are, for example, 200 to 26.
Chiral nematic liquid crystal twisted at an angle of 0 °
Through the liquid crystal layer 11 made of
The sealing members 12 are arranged such that the pole groups 8 and 7 intersect (orthogonally).
And paste them together. Also, between the two glass substrates 1 and 2
In order to keep the thickness of the liquid crystal layer 11 constant, a spacer (not shown) is used.
Zu) are arranged in large numbers. Further, polycarbonate is provided outside the glass substrate 2.
Phase difference plate 13, second phase difference plate 14,
Elementary polarizing plates 15 are stacked. In this arrangement
Use an adhesive made of acrylic material
Paste with. The light reflection layer 16 is made of aluminum,
Single layer of metal made of chrome, silver, etc. or aluminum
Made of a chromium alloy, a silver alloy, etc.
Or a metal layer made of aluminum, chromium, silver, etc.
For example, TiO_Two, ZrO_Two, SnO_TwoConsists of
A high refractive index layer, for example SiO 2_Two, AlF_Three, CaF_Two,
MgF_TwoAnd a low refractive index layer made of
Good. The convex array group 18 including the light scattering layer is photosensitive
It is formed of a transparent resin, and the transparent fine particles are contained in the resin.
Filler is uniformly dispersed.
Light scattering is imparted by the filler. This resin is an insulating organic resin, for example,
Ril resin, polyimide resin, silicone resin, etc.
It is. The filler is, for example, alumina, zirconium
A, silicon nitride, silicon carbide, titanium carbide, titanium nitride, acid
Ceramic particles such as titanium oxide, or silica particles,
Resin particles. The convex array group 18 including such a light scattering layer
Apply a transparent resin containing filler with a spinner,
After baking in an oven, the thickness is
An example is 6 μm. In the light scattering layer having such a configuration,
Is diffusely reflected by the filler, which reduces light scattering.
Can be obtained, this filler can be spherical, football, pillar
Shape, needle shape, etc., or irregular shape
No. The refractive index of the filler is determined by the refractive index of the organic resin.
Higher than the ratio, which improves light scattering.
Up. In other words, the refractive index of the filler is
Light scattering due to filler by making it larger than the refractive index
And the viewing angle dependency is improved. For that
Suitable refractive index is 1.5 to 2.5 for filler, organic resin
Then, it is 1.4 to 1.7. Further, the thickness of the light scattering layer (of the convex array group 18)
(Excluding thickness) should be 2 to 10 μm, preferably 4 to 8 μm.
In this range, high transmittance and light scattering property can be obtained.
Can combine. That is, the same filler concentration
If the film thickness is too large using the light scattering layer material of
12μm), the diffuse transmittance is stronger than the parallel transmittance
Too low and the transparency is low, so that the transparency is low. one
On the other hand, if the film thickness is too small (for example, 1 μm),
Scattering performance is reduced by reducing the absolute amount of filler in the
Lower. [Step of Forming Concavo-convex Array 18] The light scattering layer surface
The process of forming the convex array group 18 in FIG.
I will tell. (A) to (f) of FIG.
FIG. 5 is a plan view of a photolithographic mask.Step (a) SiO in the photosensitive resin mainly composed of acrylic resin_Two
Layer material with dispersed system filler (diameter 2 μm)
Apply pin coat. Spinner rotation
In this example, the spinner rotation speed is set to 100
At 0 rpm, a 6 μm positive photosensitive resin was applied.Step (b) The substrate coated as described above is heated at a temperature of, for example, 90 ° C.
For 2 minutes with a hot plate.Step (c) Next, exposure is performed using a photolithographic mask.
In this exposure, the entire surface is exposed using UV light in the normal direction of the substrate.
You. FIG. 5 shows this photolithographic mask.
You. The mask 20 is made of a Cr metal on a glass substrate 21.
And a large number of circular spots 22 (eg, iron oxide)
(For example, 10 μm diameter) are randomly arranged.
When the display surface is 5.7 inch size, it corresponds to one display surface
Glass substrate 21 has approximately 50 million spots
Is placed. The spots are not limited to a circle, but may be, for example, four spots.
Polygons, pentagons, hexagons, and even more polygons
But there is no difference in the scattering characteristics depending on the viewing direction.
It is better to make it circular. And this spot shape
A projection having substantially the same shape as the shape is formed.Step (d) After the step (c), development is performed. Changing development time
Can control the progress of development, but
By stopping, both ends are joined between each adjacent convex part.
Connected. In the exposure in step (c), the UV light
Interference occurs when passing through the spot 22, and this
Slightly less resin just below the end of the circular spot 22
Due to the photodegradation reaction, the projections
Corners are rounded.Step (e) In this heat treatment step, for example, a low temperature (130 ° C.,
2 minutes)
LetStep (f) In the next post-baking step, for example, a high temperature (20
(0 ° C., 30 minutes). As described above, the mixture is slightly melted in the step (e).
To smooth the surface shape and fine-tune the uneven shape.
And then cured in step (f). The surface of the light scattering layer formed as described above
The height difference between the top and bottom irregularities is, for example, 0.5 μm, two adjacent
Is 10 μm. On this unevenness (convex arrangement)
The light semi-transmissive film 19 is formed in the row group 18). The light translucent film 19 is made of aluminum,
Metal thin film made of aluminum, silver, etc.
Metal thin film made of gold, chromium alloy, silver alloy
As the thickness increases, the light transmittance decreases and the light reflectivity increases.
It will be good. The thickness of such a metal thin film depends on the type of metal.
The light absorption coefficient is different, and the reflection type and the transmission type are different.
Performance improvement for both applications
Although it is defined depending on what is required, usually 50 to 500
{, Preferably 100 to 400}. Alternatively, instead of a metal thin film, a dielectric half
It may be formed by a mirror. That is, the low refractive index layer and
High refractive index layers are alternately and sequentially formed into a laminated structure. Low refractive index layer
As SiO having a refractive index of 1.3 to 1.6_Two, Al
F_Three, CaF_Two, MgF_TwoSuch as high refractive index layer
TiO with a folding ratio of 2.0 to 2.8_Two, ZrO_Two, SrO_ThreeWhat
It is good to form it. The color filter 5 is of a pigment dispersion type,
Based on a photosensitive resist prepared in advance with pigments
It is applied on a plate and formed by photolithography. This
Are red, green, and blue, for example. In the liquid crystal display device C having the above structure, the
Irradiation light from external lighting such as sunlight or fluorescent light
5. Second retardation plate 14, first retardation plate 13 and glass substrate 2
And the incident light passes through the liquid crystal layer 11, and
And an overcoat layer 6 and a color filter 5.
Through the light transmissive film 19 on the convex array group 18
A part of the emitted light is scattered and reflected by the light translucent film 19, and is reflected.
The light transmitted without the light is further reflected in the convex array group 18 (also serving as the light scattering layer).
), Reaches the light reflection layer 16 and then is reflected.
The reflected light is again reflected in the convex array group 18, the color filter.
The light is emitted through the filter 5 and the like. Thus, according to the present invention, the convex array group 18
The scattered reflection by the upper light semi-transmissive film 19 is a reflection close to regular reflection.
Component is small and the reflection component at a wide angle increases.
On the other hand, pass through the light scattering layer (also serving as the uneven array group 18)
And is reflected by the reflective layer 16 and passes through the light scattering layer again.
The scattered reflected light has a large reflection component near the specular reflection.
And the reflection component at a wide angle is relatively small.
The two scattered reflections complement each other,
Are the scattering characteristics when each exists independently.
This is a characteristic that roughly adds the diffuse reflection characteristics,
Sufficient reflection intensity could be obtained for the direction of observation. [0051] DESCRIPTION OF THE PREFERRED EMBODIMENTS A color liquid crystal display device of the present invention will be described below.
Produced. On a glass substrate (0.7 mm thick) on the segment side
Has a stripe-like transparent structure made of ITO
A bright electrode group is formed, and then an alignment made of polyimide resin
A film was formed and rubbed in a certain direction. Also, a common side glass substrate (0.7 mm thick)
Light reflection made of aluminum by sputtering on top
A layer (1000 °) is formed, and transparent fine particles are formed on the light reflecting layer.
(2 μm diameter, SiO_TwoTransparent photosensitive resin dispersed
Apply a light scattering layer of (acrylic resin) with a spinner
You. The thickness of this light scattering layer was 6.0 μm. Then, hot-press at a temperature of 90 ° C. for 2 minutes.
Prebaked according to rate. Next, a photolithographic mask (10 μm
(A large number of circular spots with a diameter are randomly arranged.)
Exposure was performed using. This exposure is performed in the normal direction of the substrate.
The entire surface is exposed using V light. Further development is performed, and a low temperature (130 ° C., 2 minutes)
Heat melting to the extent that the surface shape does not change significantly by heat treatment
Let it. And by the heat treatment of high temperature (200 ° C, 30 minutes)
Let the whole cure. The scattering layer table thus formed
The height difference of the unevenness on the surface is 0.5 μm, two adjacent unevenness
The distance between them is 10 μm. The uneven surface (convex array group) has aluminum
By sputtering a metal film (70 °)
A permeable membrane is formed. In addition, color filters arranged for each pixel
Filter and photosensitive resist black matrix (each
Disposed between the color filters). An overcoat made of an acrylic resin is
A strat consisting of a coat layer and a large number of parallelly arranged ITO
A transparent transparent electrode group is formed.
Form an alignment film made of polyimide resin on the electrode group and keep it constant
Rubbing in the direction. Then, the one member and the other member are
Chiral nematic liquid crystal twisted at an angle of 40 °
Through a liquid crystal layer consisting of both stripe-shaped transparent electrodes
Paste with seal members so that groups cross (orthogonal)
I let you. The thickness of the liquid crystal layer is constant between the two glass substrates.
Many spacers are arranged in order to achieve the above. Further, the outside of the glass substrate on the segment side is
A first retardation plate, a second retardation plate,
A stack of urine-based polarizing plates is stacked. In this arrangement
Is to apply an adhesive made of acrylic material
Pasted. The liquid crystal display of the present invention thus prepared
The device has the configuration of the reflective liquid crystal display device C (FIG. 1).
ing. Next, as Comparative Example 1, the present invention
The reflection type liquid crystal display device described
A (FIG. 2). That is, the common side
No light reflection layer is formed on the glass substrate, and the unevenness of the light scattering layer surface
Sputtered aluminum metal film (1000mm) on top
By doing so, a reflective layer was obtained. By doing so, reflection on unevenness
The structure uses only the scattered reflection by the layer. Further, Comparative Example 2 is the same as that of the present invention described above.
The reflection type liquid crystal display device described above by slightly changing the configuration of
B (FIG. 3). That is, common side glass
Irregularities by photolithography on the surface of the light scattering layer on the substrate
Is not formed, and a light semi-transmissive film is not formed. do this
As a result, a structure that uses only the scattering by the light scattering layer
Was. The light scattering characteristics are shown for these three structures.
The measurement was performed using the measurement system shown in FIG. In addition, each measurement
Going in a dark room. The measurement of the light scattering characteristics is performed by using the normal line of the liquid crystal display device.
With the direction set to 0 °, the light incident direction is fixed at -25 °,
The reflectance was measured at a light receiving angle of 0 ° to 60 °. Reflectance is JI
Light incidence direction is -2 with standard white plate (MgO) according to S standard
When the reflectance at 5 ° and light receiving angle of 0 ° is 100%
Expressed as a relative value of FIG. 7 shows the result. As is apparent from FIG.
The reflectance at a wider angle than that of Comparative Example 1
The reflectivity in the specular direction can be increased without dropping
Moreover, the reflectance in the regular reflection direction is larger than that of Comparative Example 2.
Increasing the reflectance at a wide angle without dropping
Has been made. The characteristics of Comparative Example 1 and Comparative Example 2 as a whole
Scattering characteristics that have been obtained
Light scattering characteristics with sufficient light reflection intensity in the viewing direction
I got it. Such scattering characteristics are reflected by the reflective liquid crystal display.
Only with the indicating device A (Comparative Example 1) or only with B (Comparative Example 2)
Is a property that is difficult to achieve. Next, another example will be described. The photolithography used in the step of FIG.
Mask with a circular spot diameter of 10 μm and 5 μm
m are prepared, and the process shown in FIG.
Low-temperature heat treatment conditions of 130 ° C .;
° C; prepared for 3 minutes. Other fabrication conditions
Same as the embodiment of the invention, but on the unevenness of the light scattering layer surface.
Aluminum metal film (1000mm) formed by sputtering
Thus, a reflective layer was formed. Such a configuration (liquid crystal display
According to the device A), only the scattered reflection by the reflective layer on the unevenness is obtained.
It is structured to use These are shown in Table 1 as shown in Comparative Example 1-1.
To 1-4. [0071] [Table 1] The comparative examples 1-1, 1-2, 1-3, 1-4 and the present invention
FIG. 8 shows the results with the liquid crystal display device C of FIG.
According to all conditions, the degree of light scattering is large
As a result, the specular reflection component is reduced. Next, the case where the structure of the liquid crystal display device B is used will be described.
As comparative examples, they were fabricated under various conditions shown in Table 2 and evaluated.
Value. That is, the light scattering layer has a thickness of 6 μm or 4 μm.
For m, transparent fine particles dispersed in the light scattering layer
It produced about the case where the diameter of a child was 2 micrometers and 3 micrometers. That
Other manufacturing conditions are the same as in the embodiment of the present invention,
Photolithography on light scattering layer surface on side glass substrate
And no light semi-transmissive film should be formed.
Thus, the structure using only the scattering by the light scattering layer is adopted. [0075] [Table 2] Comparative Examples 2-1, 2-2, 2-3, 2-4 and the present invention
FIG. 9 shows the scattering characteristics of the example. As is apparent from FIG.
In the case of using the structure of
Display is specular because of its small size and many specular reflection components.
Would. Thus, the liquid crystal display device C of the present invention is
Thus, only the liquid crystal display device A or the liquid crystal display device B
Sufficient countermeasures for all viewing directions
It is possible to obtain a reflective color liquid crystal display device with
Came. [0079] As described above, the color liquid crystal display of the present invention is provided.
According to the device, a stripe-shaped transparent electrode group is formed on a transparent substrate.
One member consisting of an alignment layer and a light reflective
Transparent resin with transparent fine particles dispersed on a transparent substrate
A light scattering layer consisting of a transparent resin
To form a convex array group consisting of multiple convex portions
And a light transflective film and a color filter on the convex array
, Overcoat layer, stripe-shaped transparent electrode group and alignment layer
And the other member formed by sequentially laminating
Through the nematic liquid crystal so that the transparent electrodes intersect
And attach the pixels in a matrix.
In this way, the scattering of a reflector with a structure in which a reflective film is formed on irregularities
Disturbance characteristics and scattering characteristics of a structure with a light scattering layer formed on a reflector
Scattering characteristics that combine the characteristics of both scattering characteristics
Light reflection in all viewing directions
Light scattering characteristics with high intensity can be obtained, and as a result
A high quality reflective color liquid crystal display device could be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view of a liquid crystal display device of the present invention. FIG. 2 is a schematic sectional view of a conventional liquid crystal display device. FIG. 3 is a schematic sectional view of a conventional liquid crystal display device. FIGS. 4A to 4F are process charts for forming a convex array group on the surface of the light scattering layer. FIG. 5 is a plan view of a photolithographic mask. FIG. 6 is an explanatory diagram showing a measurement system for light scattering characteristics. FIG. 7 is a diagram showing light scattering characteristics with respect to a light receiving angle. FIG. 8 is a diagram showing light scattering characteristics with respect to a light receiving angle. FIG. 9 is a diagram showing light scattering characteristics with respect to a light receiving angle. [Description of Symbols] 1 ... Common-side glass substrate 2 ... Segment-side glass substrate 5 ... Color filter 6 ... Overcoat layer 7, 8 ... Stripe-shaped transparent electrode group 9, 10 ... Alignment film 11 ... Liquid crystal layer 16 ... Light reflection layer 18 ... Protrusion array group 19 ... Semi-transmissive film

Claims (1)

Claims: 1. A member formed by sequentially laminating a stripe-shaped transparent electrode group and an alignment layer on a transparent substrate, and a photosensitive member in which transparent fine particles are dispersed on a light-reflective substrate. Forming a light scattering layer made of a transparent resin, forming a convex array group formed by arranging a plurality of convex portions made of a transparent resin on this light scattering layer,
Further, the other member formed by sequentially laminating the light semi-transmissive film, the color filter, the overcoat layer, the stripe-shaped transparent electrode group, and the alignment layer on the convex array group, so that both of the stripe-shaped transparent electrode groups intersect. A color liquid crystal display device in which pixels are arranged in a matrix by bonding together via a nematic liquid crystal.