TWI559052B - Module for liquid crystal displays and liquid crystal display including the same - Google Patents

Description

Module for liquid crystal display and liquid crystal display containing the same

The present invention relates to a module for a liquid crystal display and a liquid crystal display including the same.

The polarizing plate includes a polarizer. Polarizers typically provide polarization of light via molecular alignment of polyvinyl alcohol by stretching the polyvinyl alcohol film in a machine direction (MD). In the polarizer, when the direction perpendicular to the stretching direction is the transverse direction (TD), the shrinkage in the MD and the shrinkage in the TD are different from each other, and the shrinkage in the MD is usually larger than the shrinkage in the TD.

The liquid crystal display includes a polarizing plate on the upper surface and the lower surface of the liquid crystal display panel. Each of the upper polarizing plate and the lower polarizing plate formed on the upper surface and the lower surface of the liquid crystal display panel has a cutting angle of 90° for light efficiency. Therefore, the MDs of the upper polarizing plate and the lower polarizing plate are perpendicular to each other. Therefore, the MD of the upper polarizing plate is parallel to the TD of the lower polarizing plate, and the TD of the upper polarizing plate is parallel to the MD of the lower polarizing plate. Since the polarizing plate has different shrinkage in the MD and TD, the stacked body of the upper polarizing plate/panel/lower polarizing plate may be subjected to curling. In particular, with recent years The liquid crystal display panel is thinned, and the stacked body may suffer from high curl.

The present invention relates to a module for a liquid crystal display and a liquid crystal display including the same for providing superior liquid crystal display quality.

According to an aspect of the present invention, a module for a liquid crystal display includes: a liquid crystal display panel; a first polarizing plate formed on an upper surface of the liquid crystal display panel and including a first polarizer; and a second polarizing plate, Formed on a lower surface of the liquid crystal display panel and including a second polarizer; and a retardation film formed on a lower surface of the first polarizer or an upper surface of the second polarizer, wherein the The angle between the absorption axis of a polarizer and the absorption axis of the second polarizer ranges from -5° to +5°.

The absorption axis of the first polarizer may correspond to the MD of the first polarizer.

The absorption axis of the second polarizer may correspond to the MD of the second polarizer.

The first polarizer and the second polarizer may respectively have different heat shrinkage on the MD and the TD.

The retardation film may have an angle of (45-X) ° to (45+X) ° with respect to the absorption axis of the first polarizer or the second polarizer (where X is 0 to 5) The optical axis.

The retardation film may be a λ/2 retardation film.

The retardation film may have a thickness of from 10 micrometers to 100 micrometers.

The retardation film may be a film formed of at least one of cellulose, polyester, cyclic polyolefin, polycarbonate, polyether oxime, polyfluorene, polyamine, polyimine, Polyolefin, polyarylate, polyvinyl alcohol, polyvinyl chloride, and polyvinylidene chloride resin.

The module may further include a protective film on at least one of an upper surface of the first polarizer and a lower surface of the second polarizer.

The module may further comprise a protective film on the upper or lower surface of the retardation film.

The module may include the retardation film on the lower surface of the first polarizer, and further include an adhesive layer or a bonding layer between the liquid crystal display panel and the second polarizer. There is no protective film between the liquid crystal display panel and the second polarizer.

The adhesive layer and the bonding layer may each have a two-layer structure.

The liquid crystal display panel may include an in-plane switching (IPS) mode, a fringe field switching (FFS) mode, a twisted nematic (TN) mode, and a vertical alignment. VA) mode liquid crystal.

According to another aspect of the present invention, a liquid crystal display may include a module for a liquid crystal display as described above.

Based on the above, since the angle between the absorption axes of the polarizers ranges from -5° to +5°, the forces causing the curling are mutually eliminated. Therefore, the problem of curling can be alleviated question. Further, according to one embodiment, since the retardation film has an optical axis of an angle α (where X is 0 to 5) of (45 - X) ° to (45 + X) ° with respect to the absorption axis of the second polarizer, Light passing through the liquid crystal display panel is completely absorbed into the first polarizer. Therefore, light leakage of the liquid crystal display can be prevented.

10‧‧‧third polarizer

11, 21‧‧‧ polarizer

11a, 21a, 210a, 310a, 610a, 710a‧‧‧ absorption axis

12, 13, 22, 23‧ ‧ protective film

20‧‧‧fourth polarizer

100‧‧‧LCD panel

110‧‧‧ liquid crystal cell layer

120‧‧‧First substrate

130‧‧‧second substrate

200, 600‧‧‧ first polarizer

210, 610‧‧‧ first polarizer

220, 620‧‧‧ first protective film

230, 730‧‧‧ retardation film

230a, 730a‧‧‧ optical axis

300, 700‧‧‧ second polarizer

310, 710‧‧‧ second polarizer

320, 720‧‧‧ third protective film

330‧‧‧4th protective film

400‧‧‧Light source

500, 1000‧‧‧ modules

630‧‧‧Second protective film

‧‧‧‧ angle

1 is a cross-sectional view of a module for a liquid crystal display in accordance with one embodiment of the present invention.

2 is a view showing an orientation of an optical axis and a transmission direction of light in the module for the liquid crystal display of FIG. 1.

3 is a cross-sectional view of a module for a liquid crystal display in accordance with another embodiment of the present invention.

4 is a view showing an orientation of an optical axis and a transmission direction of light in the module for the liquid crystal display of FIG. 3.

5 is a cross-sectional view of a module for a liquid crystal display according to Comparative Example 1.

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the present invention may be embodied in various forms and is not limited to the embodiments described below. In the drawings, portions that are not related to the description will be omitted for clarity. Throughout the specification, like components are indicated by like reference numerals.

As used herein, the terms such as "upper" and "lower" are defined with reference to the drawings. Therefore, it should be understood that the term "upper surface" may be used interchangeably with the term "lower surface." As used herein, the term "parallel" does not necessarily mean parallel in the mathematical sense, and includes a condition in which the absorption axes are substantially parallel to each other. That is, the absorption axis forms a micro angle in the stacking process or the manufacturing process. As used herein, the term "MD" refers to the direction of stretching of the polyvinyl alcohol film of the polarizer, and the term "TD" refers to the direction perpendicular to the MD. As used herein, the term "retardation film" refers to a half-wave plate.

1 is a cross-sectional view of a module for a liquid crystal display in accordance with one embodiment of the present invention.

Referring to FIG. 1, a module 500 for a liquid crystal display according to an embodiment of the present invention may include: a liquid crystal display panel 100; a first polarizing plate 200 formed on an upper surface of the liquid crystal display panel 100; and a second polarizing plate 300 is formed on the lower surface of the liquid crystal display panel 100 and between the liquid crystal display panel 100 and the light source 400. The first polarizer 200 may include a first polarizer 210 formed on the upper surface of the first polarizer 210. a first protective film 220 and a retardation film 230 formed on a lower surface of the first polarizer 210; wherein the second polarizing plate 300 may include a second polarizer 310, and a third formed on an upper surface of the second polarizer 310 a protective film 320 and a fourth protective film 330 formed on a lower surface of the second polarizer 310; and wherein an angle between an absorption axis of the first polarizer 210 and an absorption axis of the second polarizer 310 may be - 5° to +5°. Specifically, the angle may range from -1° to +1°, and more specifically, the angle may be 0°. The absorption axis of the first polarizer of the first polarizer may be parallel to the second bias The absorption axis of the second polarizer of the light panel.

In general, in a module for a liquid crystal display, since polarizers of polarizing plates respectively formed on upper and lower surfaces of a liquid crystal display panel have absorption axes perpendicular to each other and are exhibited in a longitudinal direction (MD) and a lateral direction The heat shrinkage on (TD) is different from heat shrinkage, so the module can suffer from curling. When the polarizing plates are stacked on both surfaces of the liquid crystal display panel, the module is mainly subjected to curling due to thermal contraction of the polarizer in the polarizing plate. However, in the module according to the present invention, since the angle between the absorption axes of the polarizers formed on the upper surface and the lower surface of the panel ranges from -5° to +5°, or specifically, the angle is 0°, so even if the first polarizing plate and the second polarizing plate are stacked on the liquid crystal display panel, the force of curling can be eliminated from each other, thereby preventing curling.

Referring to FIGS. 1 and 2, assuming that the retardation film 230 is omitted in FIG. 1, the light emitted from the light source 400 passes through a polarization state via a transmission axis (not shown in FIG. 2) perpendicular to the absorption axis 310a of the second polarizer 310. The lower liquid crystal display panel 100 is then emitted via a transmission axis perpendicular to the absorption axis 210a of the first polarizer 210. Since the absorption axis 210a of the first polarizer 210 is parallel to the absorption axis 310a of the second polarizer 310, light leaks through the transmission axis of the first polarizer 210. Therefore, there may be light leakage. Light leakage can degrade image quality.

Referring to Figures 1 and 2, on the other hand, since the module according to the embodiment of the present invention further includes the retardation film 230 on the lower surface of the first polarizer 210 as shown in Fig. 1, the retardation film 230 allows the light to be Passing through the liquid crystal display panel in a direction intersecting with the direction of the absorption axis 210a and the absorption axis 310a at 90° (corresponding to the first direction) The half-wave delay is performed, and then linearly polarized again in a direction crossing the direction at 90°, thus allowing light to be completely absorbed into the first polarizer. Therefore, light leakage can be prevented. The retardation film is a λ/2 retardation plate, and the aforementioned functionality can be achieved.

Referring to FIG. 2, the retardation film 230 may be stacked on the lower surface of the first polarizer 210 such that the optical axis 230a (slow axis) has a predetermined range of angles α with respect to the absorption axis 210a of the first polarizer 210. In one embodiment, retardation film 230 may have an angle a of (45-X) ° to (45+X) ° (where X is 0 to 5). Within this range, light passing through the liquid crystal display panel is completely absorbed into the first polarizer, thereby preventing light leakage.

The retardation film can be any plate as long as the plate is transparent and provides a λ/2 delay. In one embodiment, the retardation film may be a film formed of at least one of: cellulose (including cellulose triacetate and the like), polyester (including polyethylene terephthalate) Ester, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate and the like), cyclic polyolefin, polycarbonate, polyether oxime, polyfluorene, polyfluorene Amines, polyimines, polyolefins, polyarylate compounds, polyvinyl alcohol, polyvinyl chloride and polyvinylidene chloride resins.

The retardation film has a thickness of from 10 micrometers to 100 micrometers, preferably from 10 micrometers to 50 micrometers. Within this range, the retardation film can be applied to a polarizing plate of a liquid crystal display.

When mounted on a liquid crystal display, each of the first polarizer and the second polarizer has a molecular orientation in a particular direction to allow only light to be transmitted in a particular direction. The polarizer can be prepared by dyeing a polyvinyl alcohol film with iodine or a dichroic dye and stretching the film in a certain direction. Specifically, a polarizer is prepared via expansion, dyeing, stretching, and crosslinking. Used to perform each process Methods are generally known to those skilled in the art.

Each of the first polarizer and the second polarizer may have a thickness of from 3 micrometers to 100 micrometers. Within this range, the polarizer can be applied to a polarizing plate of a liquid crystal display. The materials and thicknesses of the first polarizer and the second polarizer may be the same or different.

Each of the first protective film, the third protective film, and the fourth protective film is a stretched or unstretched film, and may protect the polarizer or may provide a predetermined range of retardation. The protective film is a transparent optical film, and may be a film formed of at least one of cellulose (including cellulose triacetate and the like), polyester (including polyethylene terephthalate, Polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate and the like), cyclic polyolefin, polycarbonate, polyether oxime, polyfluorene, polyamine, Polyimine, polyolefin, polyarylate compound, polyvinyl alcohol, polyvinyl chloride and polydivinylidene resin. Each of the first protective film, the third protective film, and the fourth protective film may have a thickness of 10 μm to 500 μm. Within this range, the protective film can be applied to a polarizing plate of a liquid crystal display. The thicknesses and materials of the first protective film, the third protective film, and the fourth protective film may be the same or different.

The polarizing plate may include a bonding layer between the polarizer and the protective film and between the polarizer and the retardation film, and thus may exhibit improved mechanical strength of the polarizing plate. The bonding layer may comprise a typical bonding agent, for example, at least one of a water-based bonding agent, a pressure-sensitive bonding agent, and a photocurable bonding agent.

The polarizing plate may further comprise a layer stacked on the upper surface or the lower surface of the retardation film The film, and thus the improved mechanical strength of the polarizer.

The polarizing plate may have a thickness of from 25 micrometers to 500 micrometers. Within this range, the polarizing plate can be applied to a liquid crystal display. The thickness, the degree of polarization, and the transmittance of the first polarizing plate and the second polarizing plate may be the same or different.

The module may include a double layer structure of an adhesive layer, a bonding layer, or an adhesive layer or a bonding layer between the first polarizer and the liquid crystal display panel and between the second polarizer and the liquid crystal display panel without protection A film to attach the polarizer to the liquid crystal display panel (the structure for protecting the film of the PVA polarizer is not used). The adhesive layer may include at least one of a PVA resin, an acrylic resin, an isocyanate resin, and an epoxy resin adhesive.

The polarizing plate can be mounted on the liquid crystal display panel via an adhesive layer. The adhesive layer can be a typical adhesive known to those skilled in the art, for example, a pressure sensitive adhesive.

The liquid crystal display panel 100 includes a liquid crystal cell layer 110 enclosed between the first substrate 120 and the second substrate 130. In one embodiment, the first substrate may be a color filter (CF) substrate (upper substrate), and the second substrate may be a thin film transistor (TFT) substrate (lower substrate).

The first substrate and the second substrate are the same or different and may be a glass or plastic substrate. The plastic substrate may comprise polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polynaphthalene dicarboxylic acid which can be used in a flexible display. Polyethylene naphthalate (PEN), polyethersulfone (PES), polyarylate (PAR), The cycloolefin copolymer (COC) and the like are, but are not limited to.

The liquid crystal cell layer may be a liquid crystal layer including a coplanar switching (IPS) mode, a fringe field switching (FFS) mode, a twisted nematic (TN) mode, and a vertical alignment (VA) mode liquid crystal.

The light source can be a typical light source included in a liquid crystal display and includes a backlight unit.

3 is a cross-sectional view of a module for a liquid crystal display in accordance with another embodiment of the present invention.

Referring to FIG. 3, the module 1000 for a liquid crystal display may include: a liquid crystal display panel 100; a first polarizing plate 600 formed on an upper surface of the liquid crystal display panel 100; and a second polarizing plate 700 formed on the liquid crystal display panel 100. On the lower surface and between the liquid crystal display panel 100 and the light source 400, wherein the first polarizer 600 may include a first polarizer 610, a first protective film 620 formed on an upper surface of the first polarizer 610, and a a second protective film 630 on a lower surface of the first polarizer 610; wherein the second polarizing plate 700 may include a second polarizer 710, a retardation film 730 formed on an upper surface of the second polarizer 710, and a second formed a third protective film 720 on the lower surface of the polarizer 710, and wherein the angle between the absorption axis of the first polarizer 610 and the absorption axis of the second polarizer 710 may range from -5° to +5°, specifically In other words, -1° to +1°, and more specifically, the angle is 0°.

Referring to FIGS. 3 and 4, the retardation film 730 allows light to pass through the second polarizer 710 in a direction crossing the direction of the absorption axis 610a and the absorption axis 710a at 90° (corresponding to the first direction) to perform a half-wave delay, And then again at 90° with the direction Linear polarization is performed in the direction of intersection, thus allowing light that passes through the liquid crystal display panel 100 to be completely absorbed into the first polarizer 610. Therefore, light leakage can be prevented.

Referring to FIG. 4, the retardation film 730 may be stacked on the upper surface of the second polarizer 710 such that the optical axis 730a (slow axis) has a predetermined range of angles α with respect to the absorption axis 710a of the second polarizer 710. In one embodiment, the retardation film 730 may have an angle a of (45-X) ° to (45+X) ° (where X is 0 to 5). Within this range, light passing through the liquid crystal display panel is completely absorbed into the first polarizer, thereby preventing light leakage.

In accordance with another aspect of the present invention, a liquid crystal display can include a module for a liquid crystal display in accordance with an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to some examples. It is to be understood that the examples are provided for illustrative purposes only and are not to be construed as limiting the invention in any way.

The details of the components used in the examples and comparative examples are as follows.

(1) Material for polarizer: polyvinyl alcohol film (VF-PS6000 of Kuraray Co., Ltd., thickness: 60 μm)

(2) retardation film: ZD12-260 (1330) (ZEON Co., Ltd.), thickness: 44 μm, λ/2 plate, Re: 260 nm at a wavelength of 550 nm, Rth at a wavelength of 550 nm: 220 nm, NZ at a wavelength of 550 nm: 1.34)

(3) Protective film: TAC film (ZFR25SL of Fuji Co., Ltd., thickness: 25 μm)

For the sake of convenience, the polarized light formed on the upper surface of the liquid crystal display panel The board will be referred to as a "upper polarizer", and a polarizing plate formed on the lower surface of the liquid crystal display panel between the liquid crystal display panel and the backlight unit will be referred to as a "lower polarizing plate".

Example 1

The material for the polarizer is subjected to a process such as dyeing, stretching, and the like, thereby preparing a polarizer. Specifically, the polyvinyl alcohol film was stretched to 3 times its original length at 60 ° C, and then iodine was absorbed onto the film. Next, the stretched film was stretched again to 2.5 times the stretched length in a boric acid solution at 40 ° C, thereby preparing a polarizer. The protective film and the retardation film are respectively bonded to the upper surface and the lower surface of the polarizer using a bonding agent, thereby preparing a first polarizing plate. Another polarizer was prepared in the same manner as described above, and a protective film was bonded to the upper surface and the lower surface of the polarizer using a bonding agent, thereby preparing a second polarizing plate.

Each of the first polarizing plate and the second polarizing plate is cut into a rectangular shape such that a long side of the polarizing plate corresponds to an MD of the polarizer. Next, the first polarizing plate is placed on the upper surface of the liquid crystal display panel having the IPS liquid crystal mode, and the second polarizing plate is placed on the lower surface of the liquid crystal display panel and between the liquid crystal display panel and the backlight unit, and then The first polarizing plate and the second polarizing plate are bonded to the liquid crystal display panel such that their absorption axes corresponding to the MD are parallel to each other, thereby preparing a module for the liquid crystal display.

Example 2

A first polarizing plate and a second polarizing plate were prepared in the same manner as in Example 1, and then each of the first polarizing plate and the second polarizing plate was cut into a rectangular shape such that the short side of the polarizing plate corresponds to the polarizer MD. Next, the second polarized light The board is placed on the upper surface of the liquid crystal display panel having the IPS liquid crystal mode, and the first polarizing plate is placed on the lower surface of the liquid crystal display panel, and then the first polarizing plate and the second polarizing plate are bonded to the liquid crystal display panel. So that their absorption axes corresponding to the MD are parallel to each other, thereby preparing a module for a liquid crystal display.

Comparative example 1

5 is a cross-sectional view of a liquid crystal display panel according to Comparative Example 1.

A polarizer was prepared in the same manner as in Example 1, and then the protective film 12 and the protective film 13 were bonded to the upper surface and the lower surface of the polarizer 11, respectively, thereby preparing a third polarizing plate 10. Next, the protective film 22 and the protective film 23 are bonded to the upper surface and the lower surface of the polarizer 21, respectively, whereby the fourth polarizing plate 20 is prepared. The third polarizing plate 10 is cut into a rectangular shape such that the long side of the polarizer 11 corresponds to the MD, and then the third polarizing plate 10 is bonded to the upper surface of the liquid crystal display panel 100 having the IPS liquid crystal mode. Next, the fourth polarizing plate 20 is cut into a rectangular shape such that the short side of the polarizer 21 corresponds to the MD, and then the fourth polarizing plate 20 is placed on the lower surface of the liquid crystal display panel 100. Next, the fourth polarizing plate 20 is bonded to the lower surface of the liquid crystal display panel 100 such that the absorption axis 11a of the polarizer 11 is perpendicular to the absorption axis 21a of the polarizer 21, whereby the module having the structure of FIG. 5 is prepared.

Comparative example 2

A module for a liquid crystal display was prepared in the same manner as in Example 1, except that a protective film was used instead of the retardation film.

The examples for the light leakage were evaluated and the modules for the liquid crystal display prepared in the comparative examples. For the sake of convenience, formed on the upper surface of the liquid crystal display panel The upper polarizing plate is referred to as an "upper polarizing plate", and a polarizing plate formed on the lower surface of the liquid crystal display panel between the liquid crystal display panel and the light source is referred to as a "lower polarizing plate".

(1) Curl: A polarizing plate was laminated to the upper surface and the lower surface of a 0.5 mm thick glass piece, respectively, thereby preparing a sample. After the sample was placed in an oven at 85 ° C for 100 hours, the height gauge was used to measure the height from the bottom layer of the sample to the lower surface of the glass sheet, and the sample was rated. A sample having a curl height of less than 5 mm with respect to the underlayer was rated as X, and a sample having a curl height of 5 mm or more with respect to the underlayer was rated as 0.

(2) Light blocking: Each of the prepared modules for the liquid crystal display and the backlight unit are assembled. Next, when the light source was turned on to illuminate the backlight unit in the dark room, the prepared sample was evaluated with respect to light blocking using a luminance meter (RISA of Hiland Co., Ltd.). The light blocking of the samples of Examples 1 to 2 and Comparative Example 1 can be evaluated using RISA, and the light blocking of the sample of Comparative Example 2 can be evaluated using RISA. Place each of the samples in a dark room On the liquid crystal display, the light blocking is then evaluated with the naked eye.

O: Excellent. Most of the light emitted from the liquid crystal display is blocked and visible in black or blue.

X: Inferior. Light emitted from the liquid crystal display is not blocked.

As shown in Table 1, it was confirmed that the module for a liquid crystal display according to the present invention blocked light and had a low curl height, and thus hardly suffered from curling. Accordingly, the present invention provides a module for a liquid crystal display that suppresses curl and does not suffer from light leakage.

In contrast, it was confirmed that although the module of Comparative Example 1 was able to block light, the module of Comparative Example 1 suffered severe curl, wherein the upper polarizing plate of Comparative Example 1 and the absorption axis of the polarizer of the lower polarizing plate Vertical to each other. Further, it was confirmed that although the module of Comparative Example 2 was not subjected to curling, the module of Comparative Example 2 could not block light, wherein the absorption axes of the upper polarizing plate of Comparative Example 2 and the polarizer of the lower polarizing plate were parallel to each other, And no retardation film was used.

It should be understood that various modifications, changes, and modifications may be made without departing from the spirit and scope of the invention.

100‧‧‧LCD panel

110‧‧‧ liquid crystal cell layer

120‧‧‧First substrate

130‧‧‧second substrate

200‧‧‧first polarizer

210‧‧‧First polarizer

220‧‧‧First protective film

230‧‧‧Relay film

300‧‧‧second polarizer

310‧‧‧Second polarizer

320‧‧‧ Third protective film

330‧‧‧4th protective film

400‧‧‧Light source

500‧‧‧ modules

Claims (14)

A module for a liquid crystal display, comprising: a liquid crystal display panel; a first polarizing plate formed on an upper surface of the liquid crystal display panel and including a first polarizer; and a second polarizing plate formed on the liquid crystal display a second polarizer on the lower surface of the panel; wherein an angle between an absorption axis of the first polarizer and an absorption axis of the second polarizer ranges from -5° to +5°, the A polarizing plate includes the first polarizer, a first protective film formed on an upper surface of the first polarizing plate, and a retardation film directly bonded to a lower surface of the first polarizer using a bonding layer, The thicknesses of the first polarizing plate and the second polarizing plate are respectively between 25 micrometers and 500 micrometers. The module for a liquid crystal display according to claim 1, wherein the absorption axis of the first polarizer corresponds to a machine direction (MD) of the first polarizer. The module for a liquid crystal display according to claim 1, wherein the absorption axis of the second polarizer corresponds to a longitudinal direction of the second polarizer. The module for a liquid crystal display according to claim 1, wherein the first polarizer and the second polarizer respectively have different heats in a longitudinal direction and a transverse direction (TD) shrink. A module for a liquid crystal display according to claim 1 of the patent application, Wherein the retardation film has an angle of (45-X) ° to (45+X)° with respect to the absorption axis of the first polarizer or with respect to the absorption axis of the second polarizer Optical axis, where X is 0 to 5. The module for a liquid crystal display according to claim 1, wherein the retardation film is a λ/2 retardation film. A module for a liquid crystal display according to claim 1, wherein the retardation film has a thickness of from 10 micrometers to 100 micrometers. The module for a liquid crystal display according to claim 1, wherein the retardation film is a film formed of at least one of cellulose, polyester, cyclic polyolefin, and polycarbonate. Esters, polyether oximes, polybenzazoles, polyamines, polyimines, polyolefins, polyarylate compounds, polyvinyl alcohol, polyvinyl chloride and polyvinylidene chloride resins. The module for a liquid crystal display according to claim 1, further comprising: a second protective film on a lower surface of the second polarizer. The module for a liquid crystal display according to claim 1, further comprising: a second protective film on a lower surface of the retardation film. The module for a liquid crystal display according to claim 1, further comprising: an adhesive layer or a bonding layer between the liquid crystal display panel and the second polarizer, and the liquid crystal display panel There is no protective film between the second polarizer. The module for a liquid crystal display according to claim 11, wherein the adhesive layer and the bonding layer respectively form a two-layer structure. The module for a liquid crystal display according to claim 1, wherein the liquid crystal display panel comprises a coplanar switching (IPS) mode, a fringe field switching (FFS) mode, a twisted nematic (TN) mode, and a vertical Align the liquid crystal in (VA) mode. A liquid crystal display comprising the module for a liquid crystal display according to any one of claims 1 to 13.