JP2000098364A - Liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the display quality of a semitransmission and reflection type liquid crystal display panel both in a reflection state and in a transmission state. SOLUTION: The liquid crystal display panel having a first substrate 1, a second substrate 5 placed opposite to the first substrate 1, a liquid crystal layer 15 provided between the first and the second substrate 1, 5, a first color filter 9 provided either on the first substrate 1 or on the second substrate 5, a semitransmission and reflection plate 24 and a second color filter 28 is adopted. A display with excellent color saturation is made possible by using the first color filter 9 in the case where a reflection display is performed with the semitransmission and reflection plate 24 and by using the second and the first color filters 28, 9 in the case where a transmission display is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the power consumption of a liquid crystal display panel used in a liquid crystal display device.
In order to improve the visibility when the light of the external environment (external light) is strong, it is possible to perform a reflective display, and to improve the visibility when the external light is weak, a liquid crystal display device is provided with a light source unit. The present invention relates to a transflective liquid crystal display panel provided with an auxiliary light source and temporarily enabling the liquid crystal display panel to be used as a transmissive type.

Further, a liquid crystal display panel having a transflective plate relates to a color transflective liquid crystal display panel having a color filter.

[0003]

2. Description of the Related Art Currently, a liquid crystal display panel used in a liquid crystal display device has a transmissive liquid crystal display device having an auxiliary light source in the liquid crystal display device, a reflective liquid crystal display device using light from an external light source, and an external light source which is bright. In some situations, there is a transflective liquid crystal display device that uses light from an external light source and turns on an auxiliary light source when the external light source is dark and is used in a transmissive state. A reflective liquid crystal display device is effective when utilizing the low power consumption and thin characteristics of the liquid crystal display device, but a transflective type is promising because it cannot be recognized when the external environment is dark.

A conventional example of a transflective liquid crystal display device will be described with reference to the drawings. FIG. 11 is a diagram showing a cross section of a transflective liquid crystal display panel in a conventional example. In this description, the observer side is the upper side. The first provided on the observer side
The substrate 1 has a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film as a transparent conductive film. On the second substrate 5, first, a first color filter 9 including a red (R) color filter 6, a green (G) color filter 7, and a blue (B) color filter 8 is provided. The first color filter 9 described above determines whether the adjacent color filters 6, 7 and 8 slightly overlap,
Alternatively, the structure is abutted. On the first color filter 9, in order to flatten the steps of the color filter and prevent deterioration due to the process of the color filter,
A protective insulating film 10 is provided. On the protective insulating film 10,
A stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is provided as a transparent conductive film. The intersection between the scanning electrode 2 and the data electrode 11 is a pixel portion (not shown)
And a display region is formed by a plurality of pixel portions.

[0005] On the first substrate 1 and the second substrate 5, an alignment film 12 is provided as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrode 2 on the first substrate 1 and the data electrode 11 on the second substrate 5 are bonded to each other by a sealing material 16 with a certain gap therebetween so as to face each other.
The liquid crystal layer 15 is injected from an opening (not shown) provided in 6 and sealed with a sealing material (not shown).

Further, a first polarizing plate 21 is provided above the first substrate 1, and a second polarizing plate 22 is provided below the second substrate 5.
Is provided. Below the second polarizing plate 22, there is provided a semi-transmissive reflecting plate 24 that transmits part and reflects most other light. Further, a light source unit 31 is provided below the transflective plate 24 as an auxiliary light source. The configuration of the light source unit 31 includes, for example, a configuration including a cold cathode fluorescent tube, a reflection plate, a prism sheet, and a diffusion plate.

The above transflective liquid crystal display panel is
Light from external light enters the liquid crystal layer 15 after passing through the first polarizing plate 21 and the first substrate 1 as first incident light 35,
An optical rotation or a phase difference is generated by the liquid crystal layer 15, the light is incident on the color filter 9, and the second substrate 5, the second polarizing plate 2
2 and reaches the transflective plate 24. First incident light 3
5 passes through the optical path described above, so that absorption by each member occurs, and in the state of the incident light on the transflective plate 24,
Light attenuation has occurred. Second incident light 3 from an external light source
7 also passes through a similar route and reaches the transflective plate 24. The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is transmitted to the transflective plate 2
4, the first reflected light is reflected in the opposite direction to the incident light, and the second polarizing plate 22, the second substrate 5, the color filter 9, the liquid crystal layer 15, the first substrate 1 and the first Polarizing plate 2
The light is emitted to the observer side while being absorbed by 1. Therefore, the first reflected light 36 passes through the color filter 9 twice, and much absorption occurs. Also, the second incident light 36
Is only slightly reflected by a component of the light source unit 31 arranged below the transflective plate 24 because of the component transmitted by the transflective plate 24, and the second reflected light 38 is
The second reflected light 38 is very dark due to the transmission component of the transflective plate 24 and the transmission component of the color filter.

As described above, when an external light source is used, incident light 35 and 37
And transmitted to the observer side as reflected light 36 and 38,
Recognized as a display.

On the other hand, the light emitted from the light source section 31 which functions as an auxiliary light source disposed below the second substrate 5 is transmitted through the semi-transmissive reflection plate 24, the second polarizing plate 22, and the second substrate 5 , The transmitted light 40 passing through the color filter 9, the liquid crystal layer 15, the first substrate 1, and the first polarizing plate 21 and exiting to the observer side. As described above, the transmitted light 40 only passes through the color filter 9 once.

As is clear from the above description, in the case of the reflection type, brightness is important, and furthermore, since the light is transmitted twice through the color filter, it is desired to use a color filter with little absorption. FIG. 3 shows the spectral characteristics of the color filters. Optical wavelength on the horizontal axis is nanometer (nm)
The transmittance is expressed in units of percent (%) on the vertical axis. The characteristics of the color filter used for the transmission type are marked with □, × and ○, and the characteristics of the color filter used for the reflection type are not marked.

In the case of the red (R) color filter 6, the characteristic of the color filter used for the reflection type is represented by a curve 61.
600 nanometers (nm) as shown by the dashed line
In the range from to 800 nanometers (nm), a large transmittance is required, and further, 600 nanometers (nm)
Even in the blue or green wavelength region of shorter wavelength, 40
% Transmittance is required. Even under such conditions, the display becomes dark and the saturation is not sufficient. Similarly, green (G)
The characteristic of the color filter 7 is 500 nanometers (n
A large transmittance is required in the range from m) to 600 nanometers (nm), and the transmittance is about 40% in other wavelength regions. Further, the characteristics of the blue (B) color filter 8 require a large transmittance in a wavelength range shorter than 500 nanometers (nm), and show a transmittance of about 40% in other wavelength regions.

On the other hand, in the case of the transmission type, since the light passes through the color filter 9 only once, the saturation of the color filter used in the reflection type is greatly reduced. Therefore, as shown in FIG. 3, the RGB color filters 6, 7, and 8 have a narrow range in which a large transmittance is shown in order to attach importance to the saturation. Further, at wavelengths other than the necessity, a color filter exhibiting a very small transmittance is required. Further, since there is a region where the transmittance of the liquid crystal cannot be controlled around the pixel portion at the intersection of the scanning electrode 2 and the data electrode 11, the transmitted light 40 leaks from the uncontrollable portion and the display quality is deteriorated. Will also occur. Therefore, generally, a black matrix having a light-shielding property is used. However, a color filter 9 having a black matrix
When this is used for a reflection type liquid crystal display panel, the reflectance of the black matrix region is reduced, so that the brightness is reduced.

In order to solve the above problem, the light source unit 31 is not provided below the second substrate 5, and the light is guided from the periphery of the first substrate 1 and the light is transmitted from the upper side of the first substrate 1. There is a so-called front light method, but when it is used as a reflection, a light guide plate disposed above the first substrate 1 causes a deterioration in display quality. Further, since the uniformity of the light incident on the liquid crystal display panel is poor, a display with non-uniform brightness results.

In the case of the front light system, the thickness of the light guide plate is required to be several millimeters (mm) or more. Therefore, when inputting on the screen of the liquid crystal display panel, the thickness of the light guide plate depends on the thickness. Since the display and the input unit are shifted depending on the viewing angle, a problem occurs in operability.

[0016]

Therefore, there is a demand for a structure of a liquid crystal display panel which can improve the display quality of the transflective liquid crystal display panel in the reflective state and the transmissive state.

[0017]

In order to achieve the above object, a liquid crystal display panel of the present invention utilizes the following constitution.

The liquid crystal display panel of the present invention comprises a first substrate provided on the observer side, a second substrate provided facing the lower side of the first substrate, a first substrate and a second substrate. A first color filter provided on the first substrate or the second substrate, in which a liquid crystal layer is sealed, and a part of light is reflected below the first color filter. In a liquid crystal display panel having a semi-transmissive reflector that reflects most other light, a second color filter is provided below the semi-transmissive reflector.

The semi-transmissive reflector used in the liquid crystal display panel of the present invention is provided on the observer side surface of the second substrate.

The second color filter and the transflective plate used in the liquid crystal display panel of the present invention are provided on the surface of the second substrate on the viewer side in the order of the second color filter and the transflective plate. It is characterized by.

The transflective plate used in the liquid crystal display panel of the present invention is provided below the second substrate, and the second color filter is provided further below the transflective plate. .

The transflective plate used in the liquid crystal display panel of the present invention is provided below the second substrate, and the second color filter is provided on the lower surface of the transflective plate. And

The liquid crystal display panel of the present invention is characterized in that the pixel pitches of the first and second color filters are substantially equal.

In the liquid crystal display panel according to the present invention, the pixel pitches of the first color filter and the second color filter are substantially equal, and the first color filter and the second color filter have the same color. Are configured to overlap at the same position.

The liquid crystal display panel of the present invention comprises a first substrate provided on the viewer side, a signal electrode provided on the first substrate,
A second substrate provided facing the lower side of the first substrate;
A counter electrode provided on the substrate, a pixel portion including an intersection of the signal electrode and the counter electrode, a liquid crystal layer sealed between the first substrate and the second substrate, , A first color filter having a plurality of colors provided on the first substrate or the second substrate, and further reflecting a part of light on the lower side of the second substrate; And a second color filter below the semi-transmissive reflector, and a light-shielding layer between the adjacent second color filters. .

The transflective plate used in the liquid crystal display panel of the present invention has an optical polarization property.

The liquid crystal display panel according to the present invention is characterized in that the first color filter and the second color filter have alignment marks.

The liquid crystal display panel of the present invention comprises a first substrate provided on the viewer side, a signal electrode provided on the first substrate,
A second substrate provided facing the lower side of the first substrate;
A first substrate and a second electrode
A liquid crystal layer between the first substrate and the first substrate;
Alternatively, a first color filter having a plurality of colors provided on a second substrate is provided, a first polarizing plate is provided on a front side of the first substrate, and a second polarizing filter is provided on a back side of the second substrate. Having a transflector that reflects some light and reflects most other light on the lower side of the second substrate,
A liquid crystal display panel having a second color filter below the transflective plate, and a white diffuser between the first substrate and the first polarizer.

<Operation> The liquid crystal display panel of the present invention has a first
Is provided on the surface of the first substrate or the second substrate which is close to the liquid crystal layer. The first color filter can be used both when used as a reflective liquid crystal display panel and when used as a transmissive liquid crystal display panel. However, since the first color filter is used as a reflection type, it is necessary to emphasize brightness. When the first color filter is used as a transmission type, the color saturation becomes insufficient. for that reason,
In order to improve the saturation in the case of the transmission type without reducing the brightness in the case of using the reflection type, a structure in which a second color filter is provided is employed. In particular, by employing a structure in which the second color filter is provided below the transflective plate, the display quality of the transmissive type can be improved without substantially reducing the brightness when used as a reflective type. .

In order to carry out the present invention without substantially changing the structure of the conventional liquid crystal display panel, a semi-transmissive reflector is provided below the second substrate, and a second color filter is further provided below. Is adopted. The second substrate and the transflector or the second color filter may be formed separately or may be formed on the second substrate.

Further, since the second color filter is provided below the semi-transmissive reflection plate, the distance from the liquid crystal layer or the first color filter is increased. Due to this distance, parallax occurs. For example, the color of the blue color filter partially overlaps the color of the red color filter, so that the color purity is reduced and the brightness is reduced. Therefore, the problem of parallax can be solved by providing the second color filter and the transflective plate on the upper surface of the second substrate.

By making the pitch and arrangement of the first and second color filters equal, it is possible to prevent color mixing. In addition, light from the light source unit provided below the second color filter has a low scattering property, so that light transmitted through the second color filter passes through the first color filter at the same position. Can be prevented. Further, since the scattering property of the light source unit is reduced, it is necessary to improve the visibility of the display by the positional relationship between the position of the observer and the liquid crystal display panel (depending on the viewing angle). Therefore, by providing a diffusion plate or an adhesive containing a scattering material above the first color filter, it is possible to prevent color mixing between the first color filter and the second color filter and reduce the viewing angle dependency. Can be.

In order to emphasize the brightness of the first color filter, a structure in which a black matrix having a light-shielding property is not provided and the reflected light of the transflective plate is effectively used for the observer is adopted. . Therefore, by providing a black matrix in the second color filter, it is possible to prevent light leakage from a non-control region of a liquid crystal layer formed around a pixel portion where a scanning electrode and a data electrode overlap in the case of a transmissive display. Can be. As described above, the contrast ratio can be improved.

In the case of a liquid crystal display panel using a polarizing plate and a transflective plate, a material having polarization characteristics and a transflective characteristic is used for the transflective plate. This is particularly effective because the gap between the color filter and the second color filter can be reduced. As a transflective plate having a polarization characteristic, a reflective deflecting plate in which one polarization axis is a transmission axis and a substantially orthogonal polarization axis is a reflection axis is used. The reflection type polarizing plate is made of a film in which two pairs of films having different refractive indexes are laminated, and the thickness is reduced.

Further, the mutual position of the first color filter and the second color filter is required. Therefore, the first color filter and the second color filter are provided with an alignment mark enabling mutual alignment. The first color filter manufacturing method adopts a method in which a color filter material having photosensitivity is formed by a spin coating method, and an RGB color filter is formed by a photolithography process, and a transflective plate is fixed to a second substrate. In this state, the second color filter is aligned with the first color filter and formed. The formation method is
When it is provided on a film, it is formed by a printing method.
As a printing method, a method is used in which a color filter liquid is ejected from an inkjet nozzle and a color filter is formed in a short time by a plurality of inkjet nozzles. Further, a method of simultaneously printing on the front and back surfaces of the same substrate is also effective.

In particular, when a second polarizing plate is not required below the second substrate, a color filter having good alignment accuracy can be provided by simultaneously providing a color filter on the front and back surfaces of the second substrate. Filtering becomes possible.

Since the liquid crystal display panel can be turned on before the second color filter is provided, transmission and absorption, transmission and scattering, or transmission and reflection of the liquid crystal display panel applies a voltage to the liquid crystal layer. Thus, the second color filter can be created using the liquid crystal display panel. For example, when the first color filter is a red (R) color filter, the second color filter is formed by using a color filter made of a negative type photosensitive resin to form an R color filter of the first color filter. By setting the part in the transmission state and the other in the absorption state, an R color filter of the second color filter can be formed. As the black matrix, a mixture of carbon (C) powder and a positive photosensitive resin is used, and all the pixels are made to be in a transmissive state, thereby forming a black matrix having a light shielding property in a non-transmissive portion. it can. By using the above,
The alignment between the first color filter and the second color filter is performed using the pixel portion of the liquid crystal display panel, so that a color filter with good positional accuracy can be formed.

When the first color filter is provided on the upper surface of the second substrate and the second color filter is provided on the lower surface of the second substrate, the thickness of the second substrate is important. Therefore, the thinner the second substrate, the more effective. Further, when the first color filter and the second color filter are formed at the same time, or when the second color filter is formed due to the difference in transmission and absorption characteristics of the liquid crystal layer, it is necessary to improve the alignment accuracy. It is more effective that the thickness of the second substrate is smaller. Therefore, a plastic film substrate is effective. It is ideal that the transmission wavelength of the plastic film substrate is from 320 nanometers (nm) to longer wavelengths.
Transmission of ultraviolet light having a wavelength longer than nanometer (nm) is important for exposing the photosensitive resin of the color filter.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> A liquid crystal display panel according to the best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a liquid crystal display panel according to the first embodiment of the present invention. FIG. 2 is a sectional view taken along line AA shown in FIG. FIG. 3 is a graph showing the spectral characteristics of the color filters used in the liquid crystal display panel of the present invention. Hereinafter, the first embodiment will be described with reference to FIGS. 1, 2, and 3 alternately. In the present invention, the description will be made with the first substrate disposed on the observer side and the observer side as the upper side.

On the first substrate 1, a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film is provided as a transparent conductive film. The second substrate facing the first substrate 1 with a predetermined gap is a transparent glass substrate, and has a thickness of 300 micrometers (μm). Experimentally, it was used up to 100 micrometers (μm),
Considering the stability of the process of the first color filter 9, 30
0 micrometer (μm) was used.

Next, on the second substrate 5, a first color filter 9 including a red (R) color filter 6, a green (G) color filter 7, and a blue (B) color filter 8 is provided. The first color filter 9 has a structure in which the adjacent color filters 6, 7 and 8 slightly overlap or abut each other. On the first color filter 9, flattened steps of the color filter and the first
In order to prevent the color filter 9 from deteriorating, a protective insulating film 10 made of an acrylic resin is provided. A stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film as a transparent conductive film is formed on the protective insulating film 10.
Is provided. The intersection between the scanning electrode 2 and the data electrode 11 is a pixel section 13, and a display area 14 is formed by a plurality of pixel sections.

On the first substrate 1 and the second substrate 5, an alignment film 12 is provided as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material 17.

Further, on the upper side of the first substrate 1, a diffusion plate 23 in which beads having different refractive indexes are mixed with acrylic resin and a first polarizing plate 21 are provided. This diffusion plate 23 is a film-like one, or the first polarizing plate 21 and the first substrate 1.
Adhesives used for bonding with the adhesive may be used. Further, a second polarizing plate 22 is provided below the second substrate 5. Further, under the second polarizing plate 22, 10% of the light is transmitted and the remaining 9
It has a semi-transmissive reflector 24 that reflects most of the light at 0%. Further, a second color filter having the same color arrangement at the same position as the first color filter 9 is provided below the transflective plate 24.
Color filter 28. That is, the R color filter 6 of the first color filter 9 and the R color filter 25 of the second color filter 28 overlap, and similarly, 7 and 26 for the G color filter and 8 and 27 for the B color filter. The structure is to overlap.

The characteristics of the color filter used in the first embodiment will be described with reference to FIG. In the case of a reflection type liquid crystal display panel, brightness is important, and furthermore, since the light passes through the color filter twice in total at the time of incidence and at the time of emission, it is desired to use a color filter with low absorption.
FIG. 3 shows the spectral characteristics of the color filters. The horizontal axis indicates the optical wavelength in nanometers (nm), and the vertical axis indicates the transmittance in percent (%). In addition, the characteristics of the color filter used for the transmission type include:
Markers of □, × and ○ are attached, and no markers are attached to the characteristics of the color filters used for the reflection type.

The characteristics of the first color filter 9 used for the reflection type are as follows in the case of the red (R) color filter 6:
As shown by the curve 61 (dashed line), in the range from 600 nm (nm) to 800 nm (nm),
A large transmittance is required, and a transmittance of about 40% is required even in a blue or green wavelength region having a wavelength shorter than 600 nanometers (nm). Even under such conditions, the display becomes dark and the saturation is not sufficient. Similarly,
The characteristics of the green (G) color filter 7 require a large transmittance in the range of 500 nanometers (nm) to 600 nanometers (nm), and show a transmittance of about 40% in other wavelength regions. Further, the characteristics of the blue (B) color filter 8 require a large transmittance in a wavelength range shorter than 500 nm (nm),
It shows a transmittance of about 0%.

On the other hand, the second color filter 2
8 is an RGB color filter 2 for emphasizing saturation.
The spectral characteristics required for 5, 26, and 27 each have a narrow range of required transmittance, and show a very small transmittance at wavelengths other than the required wavelengths.

A light source section 31 is provided below the second color filter 28 as an auxiliary light source. Light source 31
Is composed of, for example, a cold cathode fluorescent tube, a reflection plate, a prism sheet, and a diffusion plate. Alternatively, a light source unit 31 composed of a thin electroluminescent (EL) element having relatively low power consumption is arranged.

The spectral characteristics of the second color filter 28 are limited in the brightness of the light source 31 depending on the allowable power consumption of the liquid crystal display device using the liquid crystal display panel of the present invention. When reducing power consumption, a color filter having the same spectral characteristics as the first color filter 9 can be used as the second color filter 28.

In the above transflective liquid crystal display panel, light from the external light enters the liquid crystal layer 15 from the first polarizing plate 21 and the first substrate 1 as first incident light 35, 1
An optical rotation or a phase difference is generated by the light 5, the light is incident on the color filter 9, transmitted through the second substrate 5 and the second polarizing plate 22, and reaches a semi-transmissive reflecting plate 24. Since the first incident light 35 passes through the optical path described above, absorption occurs, and when the first incident light 35 is incident on the semi-transmissive reflection plate 24, a large attenuation of light occurs. The second incident light 37 from the external light source also passes through the same route and reaches the transflective plate 24. The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is transmitted to the transflective plate 2
4, the first reflected light is reflected in the opposite direction to the incident light, and the second polarizing plate 22, the second substrate 5, the first color filter 9, the liquid crystal layer 15, the first substrate 1, The light is emitted to the observer side while being absorbed by the first polarizing plate 21.
Therefore, the first reflected light 36 passes through the color filter 9 twice, and much absorption occurs. Further, the second incident light 36 is slightly reflected by the constituent members of the second color filter 28 and the light source unit 31 disposed below the semi-transmissive reflection plate 24 because of the component transmitted by the semi-transmissive reflection plate 24. The second reflected light 38 is reflected by the semi-transmissive reflection plate 2.
The reflected light 38 becomes very dark due to the transmitted component 4 and the transmitted component of the color filter.

As described above, when an external light source is used, the incident lights 35 and 37 pass through the color filter 9 by two.
And transmitted to the observer side as reflected light 36 and 38. The display is performed mainly by the reflection intensity of the first reflection 36 by the optical modulation of the liquid crystal layer 15 and the polarizing plates 21 and 22.

On the other hand, the light emitted from the light source section 31, which is an auxiliary light source disposed below the second substrate 5, is first converted by the second color filter 28 into light having undergone color separation by a semi-transmissive reflection plate. 24, the second polarizing plate 22, the second substrate 5, the color filter 9, the liquid crystal layer 15, and the transmitted light 40 that passes through the first substrate 1 and the first polarizing plate 21 and exits to the observer side. . Therefore, two color filters 9 and 28 of the second color filter 28 and the first color filter 9 are provided.
Therefore, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

When used as a reflection type, the brightness is not reduced by the second color filter 28.

As is clear from the above description, by using the first color filter 9 and the second color filter 28, in the case of the reflection type, the first color filter 9 which emphasizes brightness is used. In the case of the transmission type, the second color filter 28 that emphasizes the saturation and the first color filter 28 are used.
By using a two-layer color filter with the color filter 9 described above, it is possible to secure the brightness of the reflective display and the saturation and brightness of the transmissive display.

<Second Embodiment> A liquid crystal display panel according to a second embodiment of the present invention will be described below with reference to the drawings. A feature of the second embodiment is that a black matrix having a light shielding property is provided in the second color filter. Another feature is that a reflection type polarizing plate that also serves as a semi-transmissive reflecting plate and a second polarizing plate is provided. FIG. 4 is a sectional view of a liquid crystal display panel according to the second embodiment of the present invention. FIG.
FIG. 4 is a cross-sectional view showing another embodiment of a portion corresponding to the line AA shown in FIG. 1 of the first embodiment. Hereinafter, the second embodiment will be described with reference to FIG.

The first made of a transparent plastic film
The substrate 1 has a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film as a transparent conductive film. A red (R) color filter 6, a green (G) color filter 7, and a blue (B) color filter are provided on a second substrate 5 made of a transparent plastic film facing the first substrate 1 with a predetermined gap. A first color filter 9 comprising 8 is provided. The first color filter 9 is
The adjacent color filters 6, 7, and 8 have a structure having a slight gap. On the first color filter 9,
A protective insulating film 10 made of acrylic resin is provided to flatten the steps of the color filter and prevent the first color filter 9 from deteriorating. On the protective insulating film 10,
A stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is provided as a transparent conductive film. The intersection between the scanning electrode 2 and the data electrode 11 is a pixel portion (not shown)
And a display region is formed by a plurality of pixel portions.

On the first substrate 1 and the second substrate 5, an alignment film 12 is provided as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material (not shown).

Further, on the upper side of the first substrate 1, a diffusion plate 23 in which beads having different refractive indexes are mixed with an acrylic resin and a first polarizing plate 21 are provided. On the lower side of the second substrate 5, there is provided a reflective deflecting plate 43 formed by laminating thin films having different refractive indexes in multiple layers. The reflection type polarizing plate 43 has a characteristic that one polarization axis is a transmission axis and an orthogonal optical axis is a reflection axis. Therefore, since the reflection type deflection plate 43 has a transmission axis and a reflection axis, it acts as a semi-transmission reflection plate by the polarization axis of the liquid crystal layer 15. Further, in order to make the reflectivity variable, it is possible to control the reflection axes of the two reflection type deflection plates by setting the angle from parallel to orthogonal.
In the second embodiment, in consideration of the thickness and the cost,
One reflection type deflection plate is used.

Further, a second color filter 28 having the same color arrangement at the same position as the first color filter 9 is provided below the reflection type polarizing plate 43. That is,
The R color filter 6 of the first color filter 9 and the R color filter 25 of the second color filter 28 overlap each other.
6. In the B color filter, 8 and 27 overlap. In addition, between the respective color filters of the second color filter 28, a black matrix 30 in which carbon (C) powder is mixed as an absorbing material with an acrylic resin is provided. By providing this black matrix 30,
When used as a transmissive type, it is possible to prevent light from leaking from a non-driving portion generated around the pixel portion and improve the contrast ratio.

A light source section 31 is provided below the second color filter 28 as an auxiliary light source. Light source 31
Is composed of an electroluminescent (EL) element which is thin and has relatively low power consumption.

The spectral characteristics of the second color filter 28 are limited in the brightness of the light source 31 depending on the allowable power consumption of the liquid crystal display device using the liquid crystal display panel of the present invention. When reducing power consumption, a color filter having the same spectral characteristics as the first color filter 9 can be used as the second color filter 28.

In the above transflective liquid crystal display panel, the light from the external light enters the liquid crystal layer 15 as the first incident light 35 from the first polarizing plate 21, the diffusion plate 23, and the first substrate 1. Then, an optical rotation or a phase difference is generated by the liquid crystal layer 15, the light is incident on the first color filter 9, and reaches the second substrate 5 and the reflective deflecting plate 43. Since the first incident light 35 passes through the optical path described above, absorption occurs, and the reflection type polarizing plate 43 is formed.
The light is attenuated in the state of the light incident on the light source. The second incident light 37 from the external light source also passes through a similar path and reaches the reflective deflecting plate 43. The light path has been described with respect to typical components. In practice, the scanning electrode 2
And so on, so much absorption occurs.

The first incident light 35 is reflected by the reflection type deflector 4
3, the light is reflected depending on the polarization direction, and is reflected as the first reflected light in the direction opposite to the incident light, and the second substrate 5, the first color filter 9, the liquid crystal layer 15, the first substrate 1, and the first The light is emitted toward the observer while being absorbed by the one polarizing plate 21.
Therefore, the first reflected light 36 passes through the first color filter 9 twice, and much absorption occurs. Also, the second
Is incident on the reflective deflecting plate 43 because of the component transmitted through the reflective deflecting plate 43 and the light that depends on the polarization direction.
Since the second color filter 28 and the light source unit 31 need to be depolarized and reflected by the components of the light source unit 31, they are only slightly reflected.

As described above, when an external light source is used, the incident lights 35 and 37 are transmitted through the first color filter 9 twice and are emitted to the observer side as reflected lights 36 and 38.

On the other hand, the light emitted from the light source unit 31, which is an auxiliary light source disposed below the second substrate 5, is firstly separated by the second color filter 28 into light of a reflection type polarizing plate. 43, the second substrate 5, the first color filter 9, the liquid crystal layer 15, the first substrate 1, and the transmitted light 40 that passes through the first polarizing plate 21 and exits to the viewer side. Therefore, since the light passes through the two color filters 9 and 28 of the second color filter 28 and the first color filter 9, the saturation is greatly improved as compared with the case where the light passes through the first color filter 9 only once. it can.

When used as a reflection type, the brightness is not reduced by the second color filter 28.

As is apparent from the above description, the use of the reflection type polarizing plate 43 makes the thickness thinner than the case where the lamination of the second polarizing plate 22 and the transflective plate 24 is used. In addition, since the reflection and the polarization can be performed in the same layer, the attenuation of light can be reduced. Further, parallax between the first color filter 9 and the second color filter 28 can be prevented.

When a second color filter 28 is formed by using a plastic film substrate for the first substrate 1 and the second substrate 5, the second color filter 28 can be in close contact with the ink jet nozzle. It is possible to form the color filter 28 with stable accuracy. Furthermore, we print by inkjet nozzle,
When scanning the substrate, the substrate is in close contact with the scanning means, so that the scanning can be performed stably, so that the positional accuracy can be improved.

Further, by providing the black matrix 30 in the second color filter 28, the influence on the periphery of the pixel portion is reduced, and the contrast ratio is improved. (Participation) can be performed.

<Third Embodiment> A liquid crystal display panel according to a third embodiment of the present invention will be described below with reference to the drawings. The feature of the third embodiment is that a first color filter is provided on a first substrate, and a scattering material is mixed in the first color filter to make the color filter have a scattering property. is there. Further, the strength of the first substrate and the strength of the second substrate are greatly changed, and the strength is secured by the first substrate. FIG. 5 is a sectional view of a liquid crystal display panel according to the third embodiment of the present invention. FIG. 5 is a sectional view showing another embodiment of a portion corresponding to the line AA shown in FIG. 1 of the first embodiment. Hereinafter, a third embodiment will be described with reference to FIG.

On a first substrate 1 made of a glass substrate,
A first color filter 9 containing a pigment in a photosensitive acrylic resin is provided. A spacer made of styrene and a scattering material 18 are mixed in the first color filter. The scattering by the first color filter 9 occurs due to the difference in the refractive index between the acrylic resin and the scattering material 18. The first color filter 9 is composed of an RGB color filter.

Further, a protective insulating film 10 is provided on the first color filter 9 to protect the first color filter 9 from deterioration. Further, on the protective insulating film 10, indium tin oxide (I) is used as a transparent conductive film.
A scanning electrode 2 made of a TO) film is provided.
A stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is provided as a transparent conductive film on a second substrate 5 made of a transparent plastic film opposed to the first substrate 1 with a predetermined gap. The intersection between the scanning electrode 2 and the data electrode 11 becomes a pixel portion (not shown),
Further, a display region is formed by a plurality of pixel portions.

The first substrate 1 has a thickness of 0.7 mm (m
m) using a glass substrate, and the second substrate 5
A millimeter (mm) plastic film substrate is used. The second substrate 5 depends on the first substrate 1 because the strength of the first substrate 1 is ten times or more. further,
In order to prevent positional deterioration of the first color filter 9 and deterioration of the substrate in the process of forming the color filter, a structure in which a color filter is provided on the first substrate 1 is employed.

On the first substrate 1 and the second substrate 5, an alignment film 12 is provided as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material (not shown).

Further, a first polarizing plate 21 is provided above the first substrate 1. On the lower side of the second substrate 5,
A second polarizing plate 22 and a transflective plate 24 are provided. Further, below the transflective plate 24, a second color filter 28 having the same color arrangement at the same position as the first color filter 9 is provided. In addition, between the respective color filters of the second color filter 28, a black matrix 30 in which carbon (C) powder is mixed as an absorbing material with an acrylic resin is provided. By providing the black matrix 30, when used as a transmission type, it is possible to prevent light from leaking from a non-driving portion around the pixel portion and to improve the contrast ratio.

A light source section 31 is provided below the second color filter 28 as an auxiliary light source. Light source 31
Is composed of an electroluminescent (EL) element which is thin and has relatively low power consumption.

The spectral characteristics of the second color filter 28 are limited in the brightness of the light source 31 depending on the allowable power consumption of the liquid crystal display device using the liquid crystal display panel of the present invention. When reducing power consumption, a color filter having the same spectral characteristics as the first color filter 9 can be used as the second color filter 28.

In the above transflective liquid crystal display panel, the light from the external light passes through the first polarizing plate 21, the first substrate 1, and the first color filter 9 as the first incident light 35. The light is incident on the liquid crystal layer 15 in a predetermined scattering state by the scattering material 18 of the first color filter 9, and the liquid crystal layer 15 causes optical rotation or a phase difference to reach the transflective plate 24. Since the first incident light 35 passes through the optical path described above, absorption occurs, and light is attenuated when the light enters the transflective plate 24. Second incident light 37 from an external light source
Passes through the same route and reaches the transflective plate 24. The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is transmitted to the transflective plate 2
4, the first reflected light is reflected in the opposite direction to the incident light, and is reflected by the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1, and the first polarizing plate 21. The light is emitted toward the observer while being absorbed. Therefore, the first reflected light 36 passes through the first color filter 9 twice,
Many absorptions occur. Further, the second incident light 36 is slightly reflected because of the component transmitted through the transflective plate 24.

As described above, when an external light source is used, the incident light 35 and the incident light 37
And transmitted to the observer side as reflected light 36 and 38,
Display is performed by a difference in reflection intensity due to optical modulation between the liquid crystal layer 15 and the polarizing plate.

On the other hand, the light emitted from the light source unit 31, which is an auxiliary light source disposed below the second substrate 5, is firstly separated by the second color filter 28 into a semi-transmissive reflecting plate. 24, the second polarizing plate 22, the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1 and the first
Light 40 passing through the polarizing plate 21 and exiting to the observer side
Becomes Therefore, the second color filter 28 and the first
Since the light passes through the two color filters 9 and 28 of the color filter 9, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

When used as a reflection type, the brightness is not reduced by the second color filter 28.

As is clear from the above description, by reducing the thickness of the second substrate 5, even if the first color filter 9 is provided on the first substrate 1, Can be reduced. further,
The reinforcement of the strength of the second substrate 5 can be achieved by selecting the material and thickness of the first substrate 1.

Further, by mixing the scattering material 18 in the first color filter 9 so that the first color filter 9 has a scattering property, it is possible to prevent the enlargement of the viewing angle and the whitening of the display. Since it is possible, a liquid crystal display panel with good display quality can be achieved.

<Fourth Embodiment> A liquid crystal display panel according to a fourth embodiment of the present invention will be described below with reference to the drawings. The feature of the fourth embodiment is that a structure in which a semi-transmissive reflection plate and a first color filter are provided on a second substrate is employed. FIG. 6 is a sectional view of a liquid crystal display panel according to the fourth embodiment of the present invention. FIG.
It is sectional drawing which shows another embodiment of the part corresponding to the AA shown in FIG. 1 of 1st Embodiment. The fourth embodiment will be described below with reference to FIG.

On a first substrate 1 made of a glass substrate,
It has a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film as a transparent conductive film. First substrate 1
0.4 mm (m
m) on a second substrate 5 made of a glass substrate having a thickness of:
60 nanometers (nm) thick aluminum (A
l) The film is provided to form the transflective plate 24. On the surface of the aluminum film, an aluminum oxide (Al2O3) film is provided as an insulating film 32 for the semi-transmissive reflection plate by anodizing. Since the thickness of the aluminum oxide film is 40 nm (nm), the final thickness of the aluminum film is 30 nm (nm).
It has characteristics as 4.

Further, a first color filter 9 having RGB color filters 6, 7, and 8 is provided on the insulating film 32 for the transflective plate. Further, a protective insulating film 10 is provided, and a stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is used as a transparent conductive film.
Is provided. The intersection between the scanning electrode 2 and the data electrode 11 forms a pixel portion (not shown), and a display region is formed by a plurality of pixel portions.

On the first substrate 1 and the second substrate 5, an alignment film 12 is provided as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material (not shown).

Further, on the upper side of the first substrate 1, a diffusion plate 23 is provided as a scattering adhesive layer made of glass beads having different refractive indexes from acrylic resin. Further, a retardation plate 29 and a first polarizing plate 21 are sequentially provided. In the fourth embodiment, since the second polarizing plate is not used, the display is performed by using the change in the birefringence of the liquid crystal layer 15, and thus the phase difference plate 29 is required.

Further, on the lower side of the second substrate 5, there is provided a second color filter 28 having the same color arrangement at the same position as the first color filter 9. Further, the second color filter 28 does not require the flatness required for the first color filter 9. That is, the first color filter 9 affects the uniformity of the gap between the liquid crystal layers 15, while the second color filter 28 requires uniformity of the color, but has an allowable range in thickness. large. Therefore, the light-shielding property is secured by overlapping the RGB color filters 25, 26, and 27 constituting the second color filter 28 around the pixel section.
As described above, without providing a black matrix,
Light shielding properties can be achieved. For this reason, when used as a transmissive type, it is possible to prevent light from leaking from the non-driving portion around the pixel portion and improve the contrast ratio.

In order to prevent the occurrence of scratches during the manufacturing process of the liquid crystal display panel of the second color filter 28 or the deterioration when the liquid crystal display panel is used as a liquid crystal display device, the insulation for the second color filter is used. A film 33 is provided. On the lower side of the second color filter 28,
A light source unit 31 is provided as an auxiliary light source. The configuration of the light source unit 31 is made of an electroluminescent (EL) element that is thin and has relatively low power consumption. By bonding the light source unit 31 to the light source unit 31 with the second color filter insulating film 33, reflection at the interface can be prevented, so that the light use efficiency can be improved when used as a transmission type. It is.

In the above transflective liquid crystal display panel, the light from the external light passes through the first polarizing plate 21, the phase difference plate 29, the diffusing plate 23, and the first substrate 1 as the first incident light 35. The light is transmitted, enters the liquid crystal layer 15, generates a phase difference due to the voltage applied to the liquid crystal layer 15, and reaches the first color filter 9 and the transflective plate 24. Since the first incident light 35 passes through the optical path described above, absorption occurs, and the m-light is attenuated when incident on the transflective plate 24. The second incident light 37 from the external light source also passes through a similar path, and
To 4. The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is transmitted to the transflective plate 2
4, the first reflected light is reflected in the opposite direction to the incident light, and is reflected by the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1, and the first polarizing plate 21. The light is emitted toward the observer while being absorbed. Therefore, the first reflected light 36 passes through the first color filter 9 twice,
Many absorptions occur. Further, the second incident light 36 is slightly reflected because of the component transmitted through the transflective plate 24.

As described above, when an external light source is used, the incident lights 35 and 37 pass through the color filter 9 by two.
And transmitted to the observer side as reflected light 36 and 38. Further, optical modulation is performed by the polarizing plate 21, the phase difference plate 29, and the liquid crystal layer 15, and the display is performed by controlling the reflection intensity.

On the other hand, the light emitted from the light source unit 31 which is an auxiliary light source disposed below the second substrate 5 is firstly separated by the second color filter 28 into the color-separated light. 5, a transflective plate 24, a liquid crystal layer 15, a first color filter 9, a first substrate 1, a diffusion plate 23, and a retardation plate 2
9 and the transmitted light 40 that passes through the first polarizing plate 21 and exits to the observer side. Therefore, the second color filter 2
Since the light passes through the two color filters 9 and 28 of the color filter 8 and the first color filter 9, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

When the reflection type is used, the brightness is not reduced by the second color filter 28.

As is clear from the above description, when used as a reflection type, the light passes through one polarizing plate 21, so that it has less absorption and a bright display as compared with the case of two. Furthermore, since the transflective plate 24 is provided on the second substrate 5, parallax can be reduced and brightness can be improved.

Further, by using an aluminum film as the semi-transmissive reflection plate 24 and further using an aluminum oxide film formed by anodizing the aluminum film, the first color filter 9 is formed. The deterioration of the aluminum film can be prevented.

<Fifth Embodiment> A liquid crystal display panel according to a fifth embodiment of the present invention will be described below with reference to the drawings. The feature of the fifth embodiment is that a second color filter is provided above a second substrate in the fourth embodiment. FIG. 7 is a sectional view of a liquid crystal display panel according to the fifth embodiment of the present invention. FIG. 7 shows the first
It is sectional drawing which shows another embodiment of the part corresponding to the AA line shown in FIG. 1 of this embodiment. Hereinafter, a fifth embodiment will be described with reference to FIG. In the description of the embodiment, the same reference numerals as those in the fourth embodiment denote the same contents.

On a first substrate 1 made of a glass substrate,
It has a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film as a transparent conductive film. First substrate 1
0.4 mm (m
m) on a second substrate 5 made of a glass substrate having a thickness of:
A second color filter 28 having RGB color filters 26, 27 and 28 is provided. On the second color filter 28, a second color filter insulating film 33 is provided to secure the adhesion of the aluminum film of the transflective plate 24.

Further, an aluminum (Al) film having a thickness of 60 nanometers (nm) is provided to form the transflective plate 24. Since the aluminum film has a small stress, it is possible to use a thin glass substrate, and further, it is possible to prevent the second color filter 28 and the second substrate 5 from peeling.
On the surface of the aluminum film, a semi-transmissive reflection plate insulating film 32 is formed.
An aluminum oxide (Al2O3) film is provided by anodic oxidation. Since the thickness of the aluminum oxide film is 40 nanometers (nm), the final thickness of the aluminum film is 30 nanometers (nm), which has the properties of the transflective plate 24.

Further, a first color filter 9 having RGB color filters 6, 7 and 8 is provided on the insulating film 32 for the transflective plate. Further, a protective insulating film 10 is provided, and a stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is used as a transparent conductive film.
Is provided. The intersection between the scanning electrode 2 and the data electrode 11 forms a pixel portion (not shown), and a display region is formed by a plurality of pixel portions.

The above transflective liquid crystal display panel comprises a first color filter 9 and a second color filter 28.
Can be made very small, thereby enabling display without parallax. Further, the total thickness of the liquid crystal display panel can be made extremely thin.

<Sixth Embodiment> A liquid crystal display panel according to a sixth embodiment of the present invention will be described below with reference to the drawings. A feature of the sixth embodiment is that a non-linear resistance element is provided on a second substrate, a semi-transmissive reflection plate is electrically connected to the non-linear resistance element, and a first resistance is provided on the first substrate. This is a point having a color filter. FIG.
FIG. 14 is a sectional view of a liquid crystal display panel according to a sixth embodiment of the present invention. FIG. 8 is a diagram showing the A shown in FIG. 1 of the first embodiment.
It is sectional drawing which shows another embodiment of the part corresponding to the -A line. The sixth embodiment will be described below with reference to FIG.

On a first substrate 1 made of a glass substrate,
A first color filter 9 composed of an RGB color filter is provided. Further, a protective insulating film 10 is provided, and on the protective insulating film 10 is provided a stripe-shaped scanning electrode 2 made of an indium tin oxide (ITO) film as a transparent conductive film. A gate electrode 46 and a gate insulation provided on the gate electrode 46 are formed on a second substrate 5 made of a glass substrate having a thickness of 0.4 mm (mm), which is opposed to the first substrate 1 with a predetermined gap. A semiconductor layer made of a film (not shown), an amorphous silicon (a-Si) film, a contact semiconductor layer containing impurity ions, a source electrode (data electrode) 45, and a drain electrode are provided. As described above, the non-linear resistance element has a thin film transistor (TFT) structure that is a three-terminal active element.

Further, on the second substrate 5, an interlayer insulating film 4
9 and a contact hole 48 is provided on the drain electrode. Further, the transflective plate 50 and the drain electrode are connected to each other via the contact hole 28 of the interlayer insulating film 49.

An alignment film 12 is provided on the first substrate 1 and the second substrate 5 as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material (not shown).

Further, on the upper side of the first substrate 1, a diffusion plate 23, a retardation plate 29, a first polarizing plate 21, and a scattering adhesive layer made of an acrylic resin and glass beads having different refractive indexes are provided. Having. In the sixth embodiment, since the second polarizing plate is not used, the display is performed by using the change in the birefringence of the liquid crystal layer 15, and thus the phase difference plate 29 is required.

Further, on the lower side of the second substrate 5, a second color filter 28 having the same color arrangement at the same position as the first color filter 9 is provided. The second color filter 28 includes an RGB color filter 25,
A structure in which 26 and 27 are close to each other is adopted.

Further, in order to prevent scratches during the manufacturing process of the liquid crystal display panel of the second color filter 28 or to prevent deterioration when the liquid crystal display panel is used as a liquid crystal display device, the second color filter insulating film is used. A film 33 is provided. On the lower side of the second color filter 28,
A light source unit 31 is provided as an auxiliary light source. The configuration of the light source unit 31 is made of an electroluminescent (EL) element that is thin and has relatively low power consumption. By bonding the light source unit 31 to the light source unit 31 with the second color filter insulating film 33, reflection at the interface can be prevented, so that the light use efficiency can be improved when used as a transmission type. It is.

In the transflective liquid crystal display panel described above, the light from the external light is transmitted to the first polarizing plate 21, the retardation plate 29, the diffusion plate 23, the first substrate 1 as the first incident light 35. First
Through the color filter 9, enters the liquid crystal layer 15, generates a phase difference due to the voltage applied to the liquid crystal layer 15, and reaches the transflective plate 24. Since the first incident light 35 passes through the above-described optical path, absorption occurs, and the semi-transmissive reflection plate 2
Light is attenuated in the state of the light incident on the light 4. The second incident light 37 from the external light source also passes through the same route and reaches the transflective plate 24. The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is transmitted to the transflective plate 2
4, the first reflected light is reflected in the opposite direction to the incident light, and is reflected by the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1, and the first polarizing plate 21. The light is emitted toward the observer while being absorbed. Therefore, the first reflected light 36 passes through the first color filter 9 twice,
Many absorptions occur. Further, the second incident light 36 is slightly reflected because of the component transmitted through the transflective plate 24.

As described above, when an external light source is used, the incident light 35 and the incident light
And transmitted to the observer side as reflected light 36 and 38. By controlling light modulation by the first polarizing plate 21, the phase difference plate 29, and the liquid crystal layer 15, display is performed based on the reflection intensity.

On the other hand, the light emitted from the light source section 31, which is an auxiliary light source disposed below the second substrate 5, is first separated by the second color filter 28 into light that has been color-separated. 5, a transflective plate 24, a liquid crystal layer 15, a first color filter 9, a first substrate 1, a diffusion plate 23, and a retardation plate 2
9 and the transmitted light 40 that passes through the first polarizing plate 21 and exits to the observer side. Therefore, the second color filter 2
Since the light passes through the two color filters 9 and 28 of the color filter 8 and the first color filter 9, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

Further, when used as a reflection type, the brightness is not reduced by the second color filter 28.

As is clear from the above description, a thin film transistor (TFT) is used as a three-terminal type nonlinear resistance element.
By driving the liquid crystal display panel by using, the modulation of the liquid crystal layer 15 can be increased, so that the display quality can be improved.

Furthermore, by connecting the drain electrode 47 connected to the non-linear resistance element and the transflective plate 24, the transflective plate 24 is used as an electrode. it can. Furthermore, since the transflective plate 24 can be provided on the side facing the liquid crystal layer 15, the problem of parallax can be improved.

In the sixth embodiment, the embodiment in which the second color filter 28 is provided below the second substrate 5 has been described.
8 is provided on the second substrate 5, and a second color filter insulating film 33 is formed on the second color filter 28.
And a structure in which a nonlinear resistance element is provided above the
Is very effective as a structure in which the color filter 9 and the second color filter 28 are close to each other. Further, as a non-linear resistance element, a three-terminal thin film transistor (TF
T) was used, but in order to lower the temperature and simplify the process, M
It is also effective to use a two-terminal non-linear resistance element composed of a diode using IM, MSI, and amorphous silicon.

<Seventh Embodiment> A liquid crystal display panel according to a seventh embodiment of the present invention will be described below with reference to the drawings. A feature of the seventh embodiment is that the first polarizing plate has an uneven shape in order to obtain anti-reflection treatment and scattering. Another feature is that a reflection type polarizing plate that also serves as a semi-transmissive reflecting plate and a second polarizing plate is provided. FIG. 9 is a sectional view of a liquid crystal display panel according to the seventh embodiment of the present invention. FIG.
FIG. 4 is a cross-sectional view showing another embodiment of a portion corresponding to the line AA shown in FIG. 1 of the first embodiment. Hereinafter, the seventh embodiment will be described with reference to FIG.

On the first substrate 1, a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film is provided as a transparent conductive film. On a second substrate 5 opposed to the first substrate 1 with a predetermined gap provided therebetween, a first (red) color filter 6, a green (G) color filter 7, and a first blue (B) color filter 8 are formed. Is provided. The first color filter 9 has a structure in which the adjacent color filters 6, 7, and 8 have a slight gap or are in an abutting state. On the first color filter 9, a protective insulating film 10 made of acrylic resin is provided in order to flatten the steps of the color filter and prevent the first color filter 9 from deteriorating. On the protective insulating film 10, a stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is provided as a transparent conductive film. The intersection between the scanning electrode 2 and the data electrode 11 forms a pixel portion (not shown), and a display region is formed by a plurality of pixel portions.

An alignment film 12 is provided on the first substrate 1 and the second substrate 5 as a processing film for aligning the liquid crystal layer 15 in a predetermined direction. The scanning electrodes 2 and the data electrodes 11 of the first substrate 1 and the second substrate 5 are bonded to each other by a seal material 16 with a certain gap therebetween so as to face each other. And sealed with a sealing material (not shown).

Further, a first polarizing plate 21 is provided above the first substrate 1. The first polarizing plate 21 is subjected to an uneven shape and a non-reflection treatment in order to impart scattering. On the lower side of the second substrate 5, there is provided a reflective deflecting plate 43 formed by laminating thin films having different refractive indexes in multiple layers. The reflection type polarizing plate 43 has a characteristic that one polarization axis is a transmission axis and an orthogonal optical axis is a reflection axis. Therefore, since the reflective polarizing plate 43 has a transmission axis and a reflective axis as polarization axes, depending on the polarization direction of light incident on the reflective polarizing plate 43,
Acts as a transflector. An adhesive 42 having scattering properties is provided between the second substrate 5 and the reflective polarizing plate 43.
Is provided. The scattering property is ensured by the adhesive 42 and the unevenness provided on the surface of the first polarizing plate 21.

Further, a second color filter 28 having the same color arrangement at the same position as that of the first color filter 9 is provided below the reflective deflecting plate 43. That is,
The R color filter 6 of the first color filter 9 and the R color filter 25 of the second color filter 28 overlap each other.
6. In the B color filter, 8 and 27 overlap.

Further, a light source section 31 is provided below the second color filter 28 as an auxiliary light source. Light source 31
Uses a structure including a cold cathode tube, a reflecting mirror and a lens sheet in order to limit the diffusivity, and the lens sheet limits the diffusivity.

The spectral characteristics of the second color filter 28 are limited in the brightness of the light source 31 depending on the allowable power consumption of the liquid crystal display device using the liquid crystal display panel of the present invention. When reducing power consumption, a color filter having the same spectral characteristics as the first color filter 9 can be used as the second color filter 28.

In the above transflective liquid crystal display panel, light from the external light enters the liquid crystal layer 15 from the first polarizing plate 21 and the first substrate 1 as first incident light 35, 1
5, an optical rotation or a phase difference is generated, the light is incident on the first color filter 9, and the second substrate 5 and the reflection type polarizing plate 43
To Since the first incident light 35 passes through the optical path described above, absorption occurs, and when the light enters the reflective deflecting plate 43, the light is attenuated. The second incident light 37 from the external light source also passes through a similar path and reaches the reflective deflecting plate 43.
The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

The first incident light 35 is reflected by the reflection type deflector 4
3, reflection occurs at a reflection intensity depending on the polarization state, and is reflected as the first reflected light in the opposite direction to the incident light,
The substrate 5, the first color filter 9, the liquid crystal layer 15, the first substrate 1, and the first polarizing plate 21 emit light toward the viewer while being absorbed. Therefore, the first reflected light 36 is
After passing through the first color filter 9 twice, much absorption occurs. Further, the second incident light 36 is reflected by the reflection type deflecting plate 4.
Since the component transmitted by 3 and the light depending on the polarization direction need to be depolarized and reflected by the components of the second color filter 28 and the light source unit 31 disposed below the reflection type polarizing plate 43 for the light depending on the polarization direction, It is only slightly reflected.

As described above, when an external light source is used, the incident light 35 and the incident light
And transmitted to the observer side as reflected light 36 and 38,
Display is performed based on the reflected light intensity.

On the other hand, the light emitted from the light source unit 31, which is an auxiliary light source disposed below the second substrate 5, is first separated by the second color filter 28 into light that has been color-separated. 43, adhesive layer (not shown), second substrate 5, first
Transmitted light 4 that passes through the color filter 9, the liquid crystal layer 15, the first substrate 1 and the first polarizing plate 21 and exits to the observer side.
It becomes 0. Therefore, the two color filters 9 of the second color filter 28 and the first color filter 9 are provided.
And 28, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

Further, when used as a reflection type, there is no decrease in brightness due to the second color filter 28.

As is clear from the above description, the use of the reflection type polarizing plate 43 makes the thickness thinner than the case where the lamination of the second polarizing plate 22 and the transflective plate 24 is used. In addition, since the reflection and the polarization can be performed in the same layer, the attenuation of light can be reduced. Further, parallax between the first color filter 9 and the second color filter 28 can be prevented.

When scattering is ensured only by the uneven shape of the surface of the first polarizing plate 21, blurring and rough feeling of characters generated due to scattering are increased. Of the first polarizing plate 21 by using a scattering adhesive layer 42 provided between the first polarizing plate 21 and the reflective polarizing plate 43.
Since the viewing angle can be sufficiently ensured even if the surface irregularities are reduced, the surface irregularities of the first polarizing plate 21 can be alleviated, and blurring of characters can be prevented. further,
In the case where the scattering property is ensured only by the adhesive layer 42, the scattering property between the first color filter 9 and the second color filter 28 becomes excessive, resulting in a shift between the color filters. Therefore, the combination of the scattering property utilizing the uneven shape of the surface of the first polarizing plate 21 and the adhesive material 42 having the scattering property is effective in improving the display quality.

<Eighth Embodiment> A liquid crystal display panel according to an eighth embodiment of the present invention will be described below with reference to the drawings. A feature of the eighth embodiment is that a first color filter, a transflective plate, and a second color filter are used for a liquid crystal display panel that does not use a polarizing plate. FIG. 10 is a sectional view of a liquid crystal display panel according to the eighth embodiment of the present invention. FIG. 10 is a cross-sectional view showing another embodiment of a portion corresponding to the line AA shown in FIG. 1 of the first embodiment. Hereinafter, the eighth embodiment will be described with reference to FIG.

On a first substrate 1 made of a transparent plastic film, a red (R) color filter 6 and a green (G)
A first color filter 9 including a color filter 7 and a blue (B) color filter 8 is provided. The first color filter 9 includes adjacent color filters 6, 7, and 8
Have a slight gap. A protective insulating film 10 made of acrylic resin is formed on the first color filter 9 in order to flatten the steps of the color filter and prevent the first color filter 9 from being deteriorated in a manufacturing process of the liquid crystal display panel. Is provided. On the protective insulating film 10,
It has a scanning electrode 2 in the form of a stripe made of an indium tin oxide (ITO) film as a transparent conductive film. First substrate 1
A stripe-shaped data electrode 11 made of an indium tin oxide (ITO) film is provided as a transparent conductive film on a second substrate 5 made of a transparent plastic film opposed to a predetermined gap. Scan electrode 2 and data electrode 1
The intersection with 1 is a pixel portion (not shown), and a display region is formed by a plurality of pixel portions.

The scanning electrodes 2 on the first substrate 1 and the second
The data electrodes 11 on the substrate 5 are adhered to each other by a sealing material 16 with a certain gap therebetween so as to face each other, a liquid crystal layer 15 is injected from an opening of the sealing material 16, and a sealing material (not shown). ). The liquid crystal layer 15 used in the eighth embodiment uses a mixed liquid crystal in which a scattering state and a transmission state are electrically controlled by a difference in refractive index between the liquid crystal and the transparent solid. By using the mixed liquid crystal, display can be performed without using a polarizing plate, so that bright display can be achieved.

Further, on the upper side of the first substrate 1, there is provided an ultraviolet ray cut film 55 for making the transmittance of light (ultraviolet light) having a wavelength shorter than 380 nanometers (nm) of optical wavelength 3% or less. The ultraviolet cut film 55 can prevent the liquid crystal layer 15 from being irradiated with ultraviolet light included in the external light source. Further, when a plastic film is used as the first substrate 1, the transmittance of the plastic film due to ultraviolet light is reduced.
It is effective to provide the ultraviolet cut film 55.

Further, a transflective plate 22 is provided below the second substrate 5, and a second color filter 28 having the same color arrangement at the same position as the first color filter 9 is provided. Have. That is, the first color filter 9
The R color filter of the second color filter 28 and the R color filter 25 of the second color filter 28 overlap, and similarly, the G color filter 26 and the B color filter 27 also overlap the same color of the first color filter 9. Also, the second
Between the color filters of the color filter 28 of
A black matrix 30 in which carbon (C) powder is mixed as an absorbing material in an acrylic resin is provided.

A light source section 31 is provided below the second color filter 28 as an auxiliary light source. Light source 31
Uses electroluminescent (EL) which is thin, elastic, and strong against impact. The substrates 1 and 5 made of a plastic film are combined with the liquid crystal layer 15 made of a mixed liquid crystal layer, and the substrates 1 and 2 are combined with a transparent solid material so that the gap between the first substrate 1 and the second substrate 5 is reduced. A liquid crystal display panel that is extremely resilient to external shocks is required because it is difficult to change due to external shocks, and furthermore, it is difficult for changes in display quality to occur due to changes in gaps. it can.

In the transflective liquid crystal display panel described above, light from external light enters the liquid crystal layer 15 from the ultraviolet cut film 55 and the first substrate 1 as the first incident light 35,
The light passes through the first color filter 9 and is scattered or transmitted by the liquid crystal layer 15, and the second substrate 5 and the semi-transmission width 2
To 2. Since the first incident light 35 passes through the optical path described above, absorption occurs, and light is attenuated when the light enters the transflective plate 22. The second incident light 37 from the external light source also passes through the same route and reaches the transflective plate 22.
The light path has been described with respect to typical components. Actually, since the scanning electrode 2 and the like are further included, much more absorption occurs.

This first incident light 35 is transmitted to the semi-transmissive reflection plate 2.
2, the first reflected light is reflected in the opposite direction to the incident light, and is absorbed by the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1, and the ultraviolet cut film 55. The light is emitted toward the observer while being accompanied. for that reason,
The first reflected light 36 passes through the first color filter 9 twice, and much absorption occurs. Further, the second incident light 3
Numeral 6 is such that the component transmitted through the transflective plate 22 is slightly reflected because it is reflected by the components below the transflective plate 22.

As described above, when an external light source is used, the incident light 35 and the incident light
And transmitted to the observer side as reflected light 36 and 38. Display is performed by controlling the difference in reflectance based on the difference in scattering and transmittance of the mixed liquid crystal.

On the other hand, the light emitted from the light source section 31, which is an auxiliary light source disposed below the second substrate 5, is first converted by the second color filter 28 into light that has been color-separated by a transflective plate. 22, the second substrate 5, the liquid crystal layer 15, the first color filter 9, the first substrate 1, and the ultraviolet cut film 5
5 is transmitted light 40 that is emitted toward the observer side. Therefore, since the light passes through the two color filters of the second color filter 28 and the first color filter 9, the saturation can be greatly improved as compared with the case where the light passes through the first color filter 9 only once.

In the case of using as a reflection type, the brightness is not reduced by the second color filter 28.

As is clear from the above description, the liquid crystal layer 1
By using the mixed liquid crystal of the liquid crystal and the transparent solid as 5, the scattering and transmission can be used. Therefore, the light source unit 3
In the display of No. 1, in the transmissive state, the light passes through the same color of the first color filter 9 and the second color filter 28, so that the color purity is good and the display is bright. On the other hand, in the scattering state, the light passing through the second color filter 28 changes its direction by the liquid crystal layer 15 and enters the first color filter 9 of a different color, so that the transmitted light may be attenuated. it can. Therefore, by providing the second color filter 28 as compared with the case where only the first color filter 9 is used, the contrast ratio can be improved. Therefore, it is very effective to apply the present invention to a scattering type liquid crystal that controls a scattering state and a transmission state.

[0145]

As apparent from the above description, in the liquid crystal display panel of the present invention, the first color filter is provided on the surface of the first substrate or the second substrate which is close to the liquid crystal layer.
The first color filter can be used both when used as a reflective liquid crystal display panel and when used as a transmissive liquid crystal display panel. However, since the first color filter is used as a reflection type, it is necessary to attach importance to brightness, and when used as a transmission type, the color saturation becomes insufficient. Therefore, a structure in which a second color filter is provided to improve the saturation in the case of the transmission type without reducing the brightness in the case of using the reflection type. In particular, by employing a structure in which the second color filter is provided below the transflective plate, the display quality of the transmissive type can be improved without substantially reducing the brightness when used as a reflective type. .

In order to carry out the present invention without substantially changing the structure of the conventional liquid crystal display panel, a semi-transmissive reflection plate is provided below the second substrate, and a second color filter is further provided below. Is adopted. The second substrate and the transflector or the second color filter may be formed separately or may be formed on the second substrate.

Further, since the second color filter is provided below the semi-transmissive reflection plate, the distance from the liquid crystal layer or the first color filter is increased. Due to this distance, parallax occurs. For example, the color of the blue color filter partially overlaps the color of the red color filter, so that the color purity is reduced and the brightness is reduced. Therefore, the problem of parallax can be solved by providing the second color filter and the transflective plate on the second substrate.

By making the pitch and arrangement of the first color filter and the second color filter equal, it is possible to prevent color mixing. In addition, light from the light source unit provided below the second color filter is reduced in scattering so that light transmitted through the second color filter is transmitted through the first color filter. It becomes possible. Further, in order to reduce the scattering of the light source unit, and to improve the visibility of the display depending on the positional relationship between the observer and the liquid crystal display panel (depending on the viewing angle), the light is diffused above the first color filter. By providing a plate or an adhesive containing a scattering material, it is possible to prevent color mixing of the first color filter and the second color filter and to reduce the viewing angle dependency.

In order to emphasize brightness, the first color filter is not provided with a black matrix having a light-shielding property, and the second color filter is provided with a black matrix. It is possible to prevent light from leaking from a non-control region of the liquid crystal layer formed around the pixel portion where the scan electrode and the data electrode overlap. As described above, the contrast ratio can be improved.

Further, by using a material having polarization characteristics and transflective characteristics for the transflector, in the case of a liquid crystal display panel using a polarizer and a transflector, the first material is used. This is particularly effective because the gap between the color filter and the second color filter can be reduced. For this reason, a semi-transmissive reflection plate uses a reflection type deflection plate in which one polarization axis is a transmission axis and a substantially orthogonal polarization axis is a reflection axis. The reflection-type polarizing plate has a structure in which two pairs of films having different refractive indexes are laminated.

The mutual position of the first color filter and the second color filter is required. Therefore, the first color filter and the second color filter are provided with an alignment mark enabling mutual alignment. The first color filter manufacturing method adopts a method in which a color filter material having photosensitivity is formed by a spin coating method, and an RGB color filter is formed by a photolithography process, and a transflective plate is fixed to a second substrate. In this state, the second color filter is aligned with the first color filter and formed. The formation method is
When it is provided on a film, it is formed by a printing method.
As a printing method, a method is used in which a color filter liquid is ejected from an inkjet nozzle and a color filter is formed in a short time by a plurality of inkjet nozzles. Further, a method of simultaneously printing on the front and back surfaces of the same substrate is also effective.

In particular, when the second polarizing plate is not required under the second substrate, a color filter having good alignment accuracy can be provided by simultaneously providing a color filter on the front surface and the back surface of the second substrate. Filtering becomes possible.

Since the liquid crystal display panel can be turned on before the second color filter is provided, it is necessary to apply a voltage to the liquid crystal layer so that the liquid crystal display panel transmits and absorbs, or transmits and scatters, or transmits and reflects. Thus, the second color filter can be created using the liquid crystal display panel. For example, when the first color filter is a red (R) color filter, the second color filter is formed by using a color filter made of a negative type photosensitive resin to form an R color filter of the first color filter. By setting the part in the transmission state and the other in the absorption state, an R color filter of the second color filter can be formed. As the black matrix, a mixture of carbon (C) powder and a positive photosensitive resin is used, and all the pixels are made to be in a transmissive state, thereby forming a black matrix having a light shielding property in a non-transmissive portion. it can. By using the above,
This is a very effective method because there is no need for alignment.

In the case where the first color filter is provided on the upper surface of the second substrate and the second color filter is provided on the lower surface of the second substrate, the thickness of the second substrate is important. Therefore, the thinner the second substrate, the more effective. Further, when the first color filter and the second color filter are formed at the same time, or when the second color filter is formed due to the difference in transmission and absorption characteristics of the liquid crystal layer, it is necessary to improve the alignment accuracy. It is more effective that the thickness of the second substrate is smaller. Therefore, a plastic film substrate is effective. Ideally, the plastic film substrate transmits light having a wavelength longer than 320 nanometers (nm). However, if the plastic film substrate transmits ultraviolet light having a wavelength longer than 350 nanometers (nm), a photosensitive material for a color filter can be obtained. It becomes possible to expose the resin.

Further, in the eighth embodiment of the present invention, the example in which the ultraviolet cut film is separately provided on the upper side of the first substrate 1 has been described. Even if titanium oxide (TiO2) is mixed and the first substrate 1 itself has an ultraviolet cut effect, the effect of the present invention is naturally effective.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal display panel of the present invention.

FIG. 2 is a sectional view of the liquid crystal display panel according to the first embodiment of the present invention.

FIG. 3 is a graph showing spectral characteristics of a color filter used in the liquid crystal display panel of the present invention.

FIG. 4 is a sectional view of a liquid crystal display panel according to a second embodiment of the present invention.

FIG. 5 is a sectional view of a liquid crystal display panel according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a liquid crystal display panel according to a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a liquid crystal display panel according to a fifth embodiment of the present invention.

FIG. 8 is a sectional view of a liquid crystal display panel according to a sixth embodiment of the present invention.

FIG. 9 is a sectional view of a liquid crystal display panel according to a seventh embodiment of the present invention.

FIG. 10 is a sectional view of a liquid crystal display panel according to an eighth embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a conventional liquid crystal display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st board | substrate 2 scan electrode 5 2nd board | substrate 9 1st color filter 10 protective insulating film 11 data electrode 12 orientation film 13 pixel part 15 liquid crystal layer 16 sealing material 17 sealing material 18 scattering material 21 1st Polarizing plate 22 Second polarizing plate 23 Diffusion plate 24 Semi-transmissive reflection plate 28 Second color filter 30 Black matrix 31 Light source unit 33 Color filter insulating film 35 First incident light 36 First reflected light 40 Transmitted light 41 Diffuse light 42 Adhesive material 43 Reflective polarizer 45 Source electrode and data electrode 46 Gate electrode 47 Drain electrode 48 Control hole 49 Interlayer insulating film 55 Ultraviolet ray cut film

Claims (11)

[Claims] A first substrate provided on an observer side, a second substrate provided below and opposed to the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. A first color filter which is sealed and provided over the first substrate or the second substrate; a part of the light is reflected on a lower side of the first color filter; A liquid crystal display panel having a semi-transmissive reflector that reflects light, wherein a second color filter is provided below the semi-transmissive reflector. 2. The liquid crystal display panel according to claim 1, wherein the transflective plate is provided on a viewer-side surface of the second substrate. 3. The second color filter and the semi-transmissive reflector are provided on a surface of the second substrate on the viewer side, and the second color filter and the semi-transmissive reflector are further arranged from the second substrate side. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is provided in the following order. 4. The device according to claim 1, wherein the transflective plate is provided below the second substrate, and the second color filter is provided further below the transflective plate. LCD panel. 5. The device according to claim 3, wherein the transflective plate is provided below the second substrate, and the second color filter is provided on a lower surface of the transflective plate. The liquid crystal display panel according to 1. 6. The liquid crystal display panel according to claim 1, wherein the pixel pitches of the first color filter and the second color filter are substantially equal. 7. The pixel pitch of the color filters of the first and second color filters is substantially equal, and the first and second color filters overlap the same color at the same position. 2. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel has a structure. 8. A first substrate provided on the observer side, a signal electrode provided on the first substrate, a second substrate provided facing the lower side of the first substrate, and a second substrate provided on the second substrate. A pixel portion comprising an intersection of the signal electrode and the counter electrode; sealing a liquid crystal layer between the first substrate and the second substrate; Having a first color filter composed of a plurality of colors provided on a substrate or a second substrate, and further reflecting a part of light on a lower side of the second substrate;
It has a semi-transmissive reflector that reflects most other light, further has a second color filter below the semi-transmissive reflector, and has a light shielding layer between adjacent second color filters. Characteristic liquid crystal display panel. 9. The liquid crystal display panel according to claim 1, wherein the transflective plate has optical polarization. 10. The liquid crystal display panel according to claim 1, wherein the first color filter and the second color filter have alignment marks. 11. A first substrate provided on an observer side;
A signal electrode provided on the first substrate, a second substrate provided facing the lower side of the first substrate, and a counter electrode provided on the second substrate, wherein the first substrate and the second substrate are provided. And a first color filter having a plurality of colors provided on the first substrate or the second substrate, and a first color filter provided on the first substrate or the second substrate. And a second polarizing plate on the back side of the second substrate. Further, a part of the light is reflected on a lower side of the second substrate, and most of the other light is reflected. A semi-transmissive reflector that reflects light, and a second
A liquid crystal display panel comprising: a color filter; and a white diffusion plate between the first substrate and the first polarizing plate.