KR20040069551A - Tansflective type liquid crystal display device - Google Patents

Abstract

PURPOSE: A transflective LCD(Liquid Crystal Display) is provided to omit a phase retardation film and produce a compact LCD. CONSTITUTION: A transflective LCD includes the first and second substrates(200,300), a lower polarizer film(202), a transparent electrode(206), a reflection electrode(210), a liquid crystal layer(280), a color filter(306), a common electrode(310), an upper phase retardation film(302), and an upper polarizer film(312). The first and second substrates includes a transmission part(D) and a reflecting part(B). The lower polarizer film is formed on the first substrate corresponding to the transmission part. The transparent film is formed on the lower phase retardation film, and the reflection electrode is formed on the first substrate corresponding to the reflecting part. The liquid crystal layer is formed between the first and second substrates. The color filter is formed on the second substrate. The common electrode is formed on the color filter. The upper phase retardation film is formed on the second substrate. The upper polarizer film is formed on the upper phase retardation film.

Description

Transflective type liquid crystal display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a compact reflective liquid crystal display device for realizing high brightness.

In general, a liquid crystal display device may be classified into a transmission type and a reflection type according to a light source to be used, and the transmission type liquid crystal display device is a backlight that is a back light source attached to a rear surface of a liquid crystal panel. The artificial light emitted from) is incident on the liquid crystal to adjust the amount of light according to the arrangement of the liquid crystal to display color.

Therefore, the transmissive liquid crystal display device has a disadvantage of large power consumption because it uses an artificial back light source, whereas the reflective liquid crystal display device has a structure in which most of the light depends on external natural light or artificial light source. The power consumption is lower than that of the transmissive liquid crystal display. However, the reflective liquid crystal display device has a limitation that external light cannot be used in a dark place or when the weather is cloudy.

Accordingly, there has been proposed a reflective and transmissive liquid crystal display device, that is, a reflective transmissive liquid crystal display device, in which the two modes can be appropriately selected and used according to a necessary situation.

Hereinafter, a configuration of the reflective transmissive liquid crystal display device will be described with reference to FIG. 1.

FIG. 1 is a cross-sectional view schematically showing a configuration of a reflective transmissive liquid crystal display device according to the related art. FIG.

As shown in the drawing, in the conventional reflective liquid crystal display device 29, the first substrate 40 and the second substrate 60 defined by the reflecting portion B and the transmitting portion D are formed by the liquid crystal layer 70. The first electrode 40 is spaced apart from each other, and on one surface of the first substrate 40 facing each other, the reflective electrode (reflector) 48 corresponds to the reflective part B, and the transparent electrode 42 corresponds to the transmissive part D. It is composed. The transparent electrode 42 and the reflective electrode 48 may be formed with the insulating layer 46 interposed therebetween, and may be formed to be in direct contact with each case.

The lower phase difference film 50 and the lower polarizing plate 52 are sequentially formed on the other surface not facing the first substrate 40, and the upper surface of the second substrate 60 not facing the first substrate 40. The upper retardation film 62 and the upper polarizing film 64 are sequentially configured.

The backlight 80 is formed under the second substrate 60.

In the above-described configuration, the liquid crystal panel 29 can be used simultaneously in the transmissive mode and the reflective mode. In the transmissive mode, the light of the lower backlight is used, and the external natural light is used in the reflective mode.

In the above-described configuration, the presence of the lower retardation film 50 constituted in the reflection-transmissive liquid crystal display device is configured because of the presence of the upper retardation film 62.

Only when the upper retardation film 62 is present is able to have a clear white and black characteristics in the reflecting portion (B). On the other hand, from the perspective of the transmissive part D, the presence of the upper retardation film is not actually necessary.

Therefore, in the structure in which the transmissive portion D and the reflecting portion B are configured in one pixel, the lower retardation film 50 is disposed in correspondence with the transmissive portion to compensate for the phase difference generated by the upper retardation film 22. It is more organized.

On the contrary, polarization characteristics will be described with reference to FIGS. 2 and 3.

FIG. 2 is a diagram illustrating polarization characteristics of light passing through a transmission part when a lower retardation film is not configured in the reflective transmissive liquid crystal display when the voltage is in an on state.

As shown, first, light linearly 45 degrees parallel to the polarization axis of the lower polarizing film 52 of the natural light emitted from the backlight 80 of FIG. 4 passes through the lower polarizing film 52. The linear flat light passes through the liquid crystal layer 70 as it is.

The linearly polarized light passing through the liquid crystal layer 70 is changed to left circularly polarized light while passing through the upper retardation film 62, and the left circularly polarized light meets the upper polarizing film 64, and is parallel to the polarization axis of the upper polarizing film 64. One component of light is transmitted.

Thus, gray is observed from the liquid crystal panel.

On the other hand, when the lower retardation film is configured in the liquid crystal display, different results may be obtained. A description with reference to FIG. 3 is as follows.

FIG. 3 is a view illustrating polarization characteristics of light passing through the transmission part D when the lower phase difference film 50 is configured in the reflective transmissive liquid crystal display when the voltage is in an on state.

As shown, first, the scattered light emitted from the backlight (80 of FIG. 4) passes through the linear polarizing film 52 and the light linearly 45 degrees parallel to the polarization axis of the lower polarizing film 52 passes through the linear polarizing film 52. Passing through the retardation film 50 is changed to right circularly polarized light.

The right circularly polarized light simply passes through the liquid crystal layer 70. The right circularly polarized light passing through the liquid crystal layer 70 is changed to 45 degree linearly polarized light while passing through the upper retardation film 62.

The linearly polarized light is in a direction perpendicular to the polarization axis of the upper polarizing film 64 and is completely absorbed by the upper polarizing film 64.

Therefore, the liquid crystal panel is observed to be completely black.

In the configuration of FIG. 1, if the upper retardation film 62 is not present, a complete black state may be realized.

However, since the upper retardation film 62 is located above the reflecting portion, this causes gray characteristics to appear in the transmission portion, and to compensate for this, it can be seen that the lower retardation film 50 must be configured to show a complete black state. there was.

In the case of the above-mentioned semi-transmissive liquid crystal display device, since the retardation films 50 and 62 must be formed on the upper and lower portions of the liquid crystal display device, the cost increase and the optical performance deterioration of the transmissive part (an optical film such as luminance by forming one more film) Performance degradation) and a problem that the thickness of the liquid crystal panel increases.

In addition, the lower polarizing film of the above-described configuration transmits only a part of the scattered light emitted from the backlight, that is, linearly polarized light of a component parallel to the polarization axis of the polarizing film, and absorbs or reflects the remaining light.

That is, at least 50% of the light emitted from the backlight does not pass through the polarizing film and is reflected. If there is a retardation film at the bottom, it is absorbed in total amount and additionally, a small amount of additional absorption occurs.

Therefore, it becomes the cause of decreasing the luminance in the transmission mode.

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-described problem, and the lower polarizing film is formed inside the liquid crystal panel only at the portion corresponding to the transmissive portion, and the retardation film is formed inside the liquid crystal panel corresponding to the reflecting portion. .

As described above, since the lower polarizing film is formed only on the transmissive part to reduce the area thereof, the loss of light emitted from the backlight can be minimized, and the upper retardation film is formed only on the reflecting part to form the lower retardation film. It can be omitted.

In addition, since the retardation film and the polarizing film described above are configured inside the liquid crystal panel, there is an advantage in that the liquid crystal panel can be configured as compared with the related art.

1 is a cross-sectional view schematically showing a configuration of one pixel of a reflective liquid crystal panel according to the related art.

FIG. 2 is a view showing optical characteristics of a transflective liquid crystal display device with a lower retardation film omitted when the voltage is on;

3 is a view showing optical characteristics of a transflective liquid crystal display device when the lower retardation film is present when the voltage is on;

4 is a perspective view showing the configuration of a general reflective transmissive liquid crystal display device;

5 is a cross-sectional view schematically showing the configuration of a reflective liquid crystal display device according to a first embodiment of the present invention;

6A to 6C are cross-sectional views illustrating a first method of manufacturing an in-cell polarizing film according to the present invention in a process sequence;

7A to 7C are cross-sectional views illustrating a second method of manufacturing the in-cell polarizing film according to the present invention, according to a process sequence;

FIG. 8 is a cross-sectional view schematically showing the configuration of a reflective transmissive liquid crystal display device according to a second embodiment of the present invention;

9 is a cross-sectional view schematically showing the configuration of a reflective transmissive liquid crystal display device according to a third embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

200: first substrate 202: lower in-cell polarizing film

206: transparent electrode 208: insulating film

210: reflective electrode 280: liquid crystal layer

300: second substrate 302: reflective electrode

306: color filter 310: common electrode

312: upper polarizing film

According to an aspect of the present invention, there is provided a reflective transmissive liquid crystal display device comprising: a first substrate and a second substrate on which a plurality of pixels including transmissive portions and reflecting portions are defined; A lower polarizing film configured to correspond to the transmissive part on the first substrate; A lower retardation film composed of the same area on the lower polarizing film; A transparent electrode formed on the lower retardation film; A reflecting electrode configured to correspond to a reflecting portion on the first substrate on which the transparent electrode is formed; A liquid crystal layer formed on the first substrate including the transparent electrode and the reflective electrode; A second substrate formed on the liquid crystal layer; A color filter configured on one surface of the second substrate facing the liquid crystal layer; A transparent common electrode formed under the color filter; An upper retardation film formed on the second substrate; It includes an upper polarizing film configured on the upper retardation film.

In the above-described configuration, the lower polarizing film may be composed of a liquid crystal material oriented in a predetermined direction, and in another way, the polarizing plate is formed to form a low-resistance metal layer into an ion beam to have a predetermined direction to transmit the polarized light arbitrarily Can be configured.

In this case, the material for forming the low resistance metal layer may be aluminum (Al).

An insulating film is further configured between the lower polarizing film and the lower retardation film.

According to a second aspect of the present invention, there is provided a reflective transmissive liquid crystal display device comprising: a first substrate and a second substrate on which a plurality of pixels including transmissive portions and reflective portions are defined; A lower polarizing film configured to correspond to the transmissive part on the first substrate; A transparent electrode formed on the lower polarizing film; A reflecting electrode configured to correspond to a reflecting portion on the first substrate on which the transparent electrode is formed; A liquid crystal layer formed on the first substrate; A second substrate formed on the liquid crystal layer; An upper retardation film configured to correspond to the reflecting portion of the second substrate facing the liquid crystal layer; A color filter formed below the upper retardation film and the second substrate corresponding to the transmissive portion; A transparent common electrode formed under the color filter; It includes an upper polarizing film configured on the second substrate.

According to a third aspect of the present invention, there is provided a reflective transmissive liquid crystal display device comprising: a first substrate and a second substrate having a plurality of pixels defined by a transmissive portion and a reflective portion; A lower polarizing film configured to correspond to the transmissive portion on the first substrate; A transparent electrode formed on the lower polarizing film; A reflecting electrode configured to correspond to a reflecting portion on the first substrate on which the transparent electrode is formed; A liquid crystal layer formed on the first substrate including the transparent electrode and the reflective electrode; A second substrate formed on the liquid crystal layer; An upper polarizing film formed on one surface of the second substrate facing the liquid crystal layer; A retardation film formed under the upper polarizing film corresponding to the reflecting unit; A color filter formed under the retardation film and the second substrate corresponding to the transmissive portion; It includes a transparent common electrode formed under the color filter.

Hereinafter, a schematic configuration of a general reflective transmissive liquid crystal display device will be described before explaining embodiments of the present invention.

4 is a view showing a schematic configuration of a general reflective transmissive liquid crystal display device.

As illustrated, the reflective liquid crystal panel 99 is spaced apart from the first substrate 100 including the thin film transistor array unit and the second substrate 118 including the color filter 114 with the liquid crystal layer 108 therebetween. Configure.

The first substrate 100 includes a gate line 102 extending in one direction and a data line 120 crossing the vertical line and defining a pixel area P with the gate line 102. Configure.

The thin film transistor T including the gate electrode 124, the active layer 126, the source electrode 128, and the drain electrode 130 is formed at the intersection point of the gate line 102 and the data line 120.

The pixel area P is defined as a transmissive portion D and a reflective portion B, and forms a transparent electrode 106 corresponding to the transmissive portion D and a reflective electrode corresponding to the reflective portion B. Configure 104.

Accordingly, the reflecting unit B operates in the reflective mode, and the transmitting unit D operates in the transmissive mode.

With reference to the above configuration, embodiments of the present invention will be described below.

First Embodiment

A feature of the first embodiment of the present invention is that the lower polarizing film is configured inside the liquid crystal panel corresponding to the transmissive portion except for the reflective portion, and the lower retardation film is also configured inside the liquid crystal panel.

FIG. 5 is a cross-sectional view illustrating a schematic configuration of one pixel of the reflective transmissive liquid crystal display device according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VIII of FIG. Omitted)

As shown in the drawing, the pixel P composed of the transmissive portion D and the reflective portion B is spaced apart from the defined first 100 and second substrate 118.

A backlight 150 is formed under the first substrate 100, and a lower in-cell polarizer 124 is disposed on the upper portion of the first substrate 100 to correspond to the transmission part D. The lower in-cell retardation film 128 is formed with the in-cell polarizing film 124 and the insulating film 126 interposed therebetween.

The transparent electrode 106 is formed on the substrate 100 having the lower in-cell retardation film 128 corresponding to the transmission part D, and the reflection electrode 104 is formed on the reflection part B. do.

In this case, in general, the transparent electrode 106 and the reflective electrode 104 may be configured with the insulating layer 105 interposed therebetween.

The second substrate 118 is formed with the first substrate 100 and the liquid crystal layer 108 interposed therebetween, and a color filter 114 is formed on one surface of the second substrate 118 facing the liquid crystal layer 108. And a transparent common electrode 110 under the color filter 114.

The upper retardation film 120 and the upper polarizing film 122 are sequentially formed on the second substrate 118.

Since the above-described configuration is a structure in which the lower polarizing film 124 and the lower retardation film 128 are configured only in the transmitting part D, the area of the reflecting part B is reduced as compared with the related art.

Therefore, a large amount of light emitted from the backlight 150 passes through the lower polarizing film 150 and the lower retardation film 128 and proceeds to the liquid crystal layer 108.

As described above, since the optical films required for the transmission part D are configured only in the transmission part D as described above, since the amount of light loss can be reduced due to the smaller area than in the related art, the luminance in the transmission mode is increased. There is a significant improvement.

In addition, unlike the conventional configuration, since the polarizing film and the retardation film are configured inside the liquid crystal panel, there is an advantage that the liquid crystal panel can be more compactly manufactured.

Hereinafter, a first method of configuring a polarizing film inside the liquid crystal panel will be described with reference to FIGS. 6A to 6C.

6A to 6C are cross-sectional views illustrating a method of manufacturing an in-cell polarizer according to a process sequence. A photolithography process is performed to form an in-cell polarizer.

As shown in FIG. 6A, after the alignment resin, such as polyimide, is applied onto the transparent substrate 100, a rubbing process is performed. The configured alignment layer 111 is formed.

When the polarizing material in a liquid crystal state is coated on the alignment layer 111, the polarizing material becomes a polarizing layer 112 having a predetermined direction by the alignment layer.

The work of hardening the polarizing layer 112 by heat is performed.

Next, as shown in FIG. 6B, a photoresist (“PR layer”) is coated on the polarizing layer 112 to form a PR layer 117, and the PR layer 117. Position the mask (M) consisting of the transmission portion (E) and the blocking portion (F) in the spaced apart upper portion.

Subsequently, a process of exposing and developing the lower PR layer 117 by irradiating light to the upper portion of the mask M is performed, and corresponds to the blocking portion F of the mask M as shown. Only PR 117 ′ remains to expose the lower polarizing layer 112 corresponding to the transmissive portion E of the mask M.

When the exposed polarization layer 112 is removed with a predetermined etching solution, as shown in FIG. 6C, the patterned polarization film 124 remains on the substrate 100.

Through the above-described process, it is possible to form the in-cell polarizing film according to the first method.

Hereinafter, a method of manufacturing the in-cell polarizing film according to the second method will be described with reference to FIGS. 7A to 7C.

As shown in FIG. 7A, a metal material having a low resistance such as aluminum (Al) is thinly deposited on the substrate 100 to form the preceding polarization layer 160.

Next, the polarizing layer 162 is formed by irradiating an ion beam having a high energy to the preceding polarizing layer 160 to shape the preceding polarizing layer 160 into a fine pattern having a certain directivity.

At this time, the direction of the fine pattern 124 performs the function of the polarizing film.

Next, by patterning the polarizing layer 162 using the photolithography process described in the first method, as shown in FIG. 7C, the patterned polarizing film 124 is formed on the substrate 100. You can do it.

Through the above-described process, it is possible to form the in-cell polarizing film according to the second method.

The first method is mainly used when manufacturing a small liquid crystal panel, and the second method is mainly used when manufacturing a large liquid crystal panel.

In the above-described configuration of FIG. 5, the in-cell-phase difference film 202 uses a polymer whose polymer is changed in physical and chemical properties by ultraviolet rays, and the polymer has optical anisotropy, so that the polymer is in an arrangement state by light irradiation. As a result, the normal refractive index and the extraordinary refractive index are changed to give a phase difference according to the Δnd value.

In addition, the patterning method may use the photolithography process described above.

Hereinafter, another modification of the first embodiment of the present invention will be described through the second embodiment.

Second Embodiment

The second embodiment of the present invention is characterized in that the lower polarizing film is configured inside the liquid crystal panel corresponding to the transmission part, and the upper retardation film is configured only on the reflecting part so that the lower retardation film can be omitted.

8 is a cross-sectional view showing a schematic configuration of a reflective liquid crystal display device according to a second embodiment of the present invention.

As shown in the drawing, the first and second substrates 200 and 300 defined by the pixel P including the transmissive part D and the reflective part B are spaced apart from each other.

A backlight 250 is formed under the first substrate 200, and a lower in-cell polarizer 202 is disposed on the upper portion of the first substrate 200 to correspond to the transmission part D. Configure.

The transparent electrode 206 is formed on the substrate 202 on which the lower in-cell polarizing film 202 is formed, corresponding to the transmissive portion D, and the reflective electrode 210 is formed on the reflective portion B. do.

In this case, in general, the transparent electrode 206 and the reflective electrode 210 may be configured with the insulating layer 208 interposed therebetween.

The second substrate 300 is formed with the first substrate 200 and the liquid crystal layer 280 interposed therebetween, and the reflection portion B of the second substrate 300 facing the liquid crystal layer 280 is formed of phosphorus. -Constitute a cell retardation film 302.

One surface of the second substrate 300 exposed in correspondence with the in-cell retardation film 302 and the transmission part D is coated with a color resin to form a color filter 306 having a predetermined color. . The transparent common electrode 310 is formed under the color filter 306.

An upper polarizing film 312 is formed on the second substrate 300.

The above-described configuration constitutes the lower polarizing film 202 corresponding to the transmissive portion D, and the upper retardation film 302 corresponds to the reflecting portion B, so that the lower polarizing film 202 exits from the backlight 250. Since a large amount of light passes through the polarizing film 202 to the liquid crystal layer 280, the luminance of the transmission part D may be improved.

Furthermore, since the upper retardation film 302 is configured only in the reflecting portion B, it is possible to omit the lower retardation film formed in the transmission portion D to compensate for the effect.

As a result, the luminance is further improved because there is no decrease in luminance due to the lower retardation film.

In addition, since the upper retardation film 302 and the lower polarizing film 202 are configured inside the liquid crystal panel, the reflective transmissive liquid crystal display device can be more compactly manufactured.

Hereinafter, another modified example of the first embodiment will be proposed through the third embodiment.

Third Embodiment

A third embodiment of the present invention is characterized in that the upper polarizing film is configured inside the liquid crystal panel.

9 is a cross-sectional view showing a schematic configuration of a reflective liquid crystal display device according to a third embodiment of the present invention.

As shown in the drawing, the pixel P composed of the transmission part D and the reflection part B is spaced apart from the defined first and second substrates 400 and 500.

A backlight 450 is formed under the first substrate 400, and a lower in-cell polarizer 402 is disposed on the upper portion of the first substrate 400 to correspond to the transmission part D. Configure.

The transparent electrode 406 is formed on the substrate 400 having the lower in-cell polarizing film 402 corresponding to the transmission part D, and the reflection electrode 410 is formed on the reflection part B. do.

In this case, in general, the transparent electrode 406 and the reflective electrode 410 may be configured with an insulating film 408 interposed therebetween.

The second substrate 500 is formed with the first substrate 400 and the liquid crystal layer 480 interposed therebetween, and an upper in-cell polarization is formed on the entire surface of the second substrate 500 facing the liquid crystal layer 480. The film 502 is constituted.

An upper in-cell retardation film 508 is formed under the upper in-cell polarizing film 502 corresponding to the reflecting portion B, and exposed in correspondence with the in-cell retardation film 508 and the transmissive portion D. The color filter is coated on one surface of the substrate 500 to form a color filter 510.

A lower portion of the color filter 510 forms one transparent common electrode 512 selected from a transparent conductive metal group including indium tin oxide (ITO) and indium zinc oxide (IZO).

An insulating film 506 is further formed between the in-cell retardation film 508 and the upper in-cell polarizing film 502.

In the above-described configuration, the lower in-cell polarizing film 402 is positioned corresponding to the transmission part D, and the upper in-cell retardation film 508 is located only in the reflecting part B.

Therefore, since a large amount of light emitted from the backlight 350 passes through the lower in-cell polarizing film 402 to the liquid crystal layer 480, the luminance of the transmission part D may be improved. Furthermore, since the upper in-cell retardation film 508 is configured only in the reflecting portion B, it is possible to omit the lower retardation film configured in the transmitting portion D to compensate for the effect.

As a result, the luminance is further improved because there is no decrease in luminance due to the lower retardation film.

In addition, since the upper in-cell retardation film 508, the lower polarizing film 402, and the upper in-cell polarizing film 502 are configured inside the liquid crystal panel, the reflective transmissive liquid crystal display device can be manufactured more compactly. do.

As described above, the reflective transmissive liquid crystal display device according to the present invention having the configuration as described above can be manufactured.

As described above, the reflective transmissive liquid crystal display device according to the present invention has the effect of minimizing the loss of light and improving the luminance because the lower polarizing film required for the polarization characteristic of the transmissive mode is configured to correspond to only the transmissive portion.

Second, since the upper retardation film is configured to correspond only to the reflecting portion, the lower retardation film configured to correspond to the transmission portion can be omitted, thereby reducing the brightness of the light and thereby reducing the cost.

Third, since the upper retardation film and the lower polarizing film are configured inside the liquid crystal panel, the liquid crystal panel can be made compact.

Claims (17)

A first substrate and a second substrate on which a plurality of pixels composed of a transmission portion and a reflection portion are defined; A lower polarizing film configured to correspond to the transmissive part on the first substrate; A lower retardation film composed of the same area on the lower polarizing film; A transparent electrode formed on the lower retardation film corresponding to the transmission part; A reflection electrode formed on the lower retardation film corresponding to the reflection part; A liquid crystal layer formed on the first substrate including the transparent electrode and the reflective electrode; A second substrate formed on the liquid crystal layer; A color filter configured on one surface of the second substrate facing the liquid crystal layer; A transparent common electrode formed under the color filter; An upper retardation film formed on the second substrate; An upper polarizing film formed on the upper retardation film Reflective type liquid crystal display device comprising a. The method of claim 1, The lower polarizing film is a reflection type liquid crystal display device composed of a liquid crystal material oriented in a predetermined direction. The method of claim 1, The polarizing plate is formed by forming a low resistance metal layer into an ion beam to reflect a liquid crystal display device configured to have a predetermined direction to transmit the polarized light arbitrarily. The method of claim 3, wherein And a material forming the low resistance metal layer is aluminum (Al). The method of claim 1, A reflective liquid crystal display device comprising means for emitting light under a first substrate. The method of claim 1, And a lower insulating film between the lower polarizing film and the lower retardation film. A first substrate and a second substrate on which a plurality of pixels composed of a transmission portion and a reflection portion are defined; A lower polarizing film configured to correspond to the transmissive part on the first substrate; A transparent electrode configured to correspond to the transmission part on the lower polarizing film; A reflection electrode configured to correspond to the reflection part on the lower polarizing film; A liquid crystal layer formed on the first substrate; A second substrate formed on the liquid crystal layer; An upper retardation film configured to correspond to the reflecting portion of the second substrate facing the liquid crystal layer; A color filter formed below the upper retardation film and the second substrate corresponding to the transmissive portion; A transparent common electrode formed under the color filter; An upper polarizing film formed on the second substrate Reflective type liquid crystal display device comprising a. The method of claim 7, wherein The lower polarizing film is a reflection type liquid crystal display device composed of a liquid crystal material oriented in a predetermined direction. The method of claim 7, wherein The lower polarizing film is formed by forming a low-resistance metal layer into an ion beam to reflect a liquid crystal display device configured to have a predetermined direction to transmit the polarized light arbitrarily. The method of claim 9, And a material forming the low resistance metal layer is aluminum (Al). The method of claim 7, wherein A reflective liquid crystal display device comprising means for emitting light under a first substrate. A first substrate and a second substrate on which a plurality of pixels composed of a transmission portion and a reflection portion are defined; A lower polarizing film configured to correspond to the transmissive part on the first substrate; A transparent electrode configured to correspond to the transmission part on the lower polarizing film; A reflection electrode configured to correspond to the reflection part on the lower polarizing film; A liquid crystal layer formed on the first substrate including the transparent electrode and the reflective electrode; A second substrate formed on the liquid crystal layer; An upper polarizing film formed on one surface of the second substrate facing the liquid crystal layer; A retardation film formed under the upper polarizing film corresponding to the reflecting unit; A color filter formed under the retardation film and the second substrate corresponding to the transmissive portion; Transparent common electrode formed under the color filter Reflective type liquid crystal display device comprising a. The method of claim 12, The lower polarizing film is a reflection type liquid crystal display device composed of a liquid crystal material oriented in a predetermined direction. The method of claim 12, The polarizing plate is formed by forming a low resistance metal layer into an ion beam to reflect a liquid crystal display device configured to have a predetermined direction to transmit the polarized light arbitrarily. The method of claim 14, And a material forming the low resistance metal layer is aluminum (Al). The method of claim 12, A reflective liquid crystal display device comprising means for emitting light under a first substrate. The method of claim 12, The reflective liquid crystal display device further comprising an insulating film between the upper polarizing film and the upper retardation film.