KR101096700B1 - Color filter substrate and liquid crystal display device having the same - Google Patents

Abstract

The present invention is to provide a color filter substrate and a liquid crystal display device using the same that is configured to thin the polarizing plate and the color filter integrally in one sheet (sheet), the color filter substrate for achieving the above object is made A first protective layer, a film type color filter layer, a first adhesive layer, a compensation film, a second adhesive layer, a supporter layer, a polarizer, a second protective layer, an antireflection film and a third protective layer are laminated.

The liquid crystal display including the color filter substrate includes a color filter array substrate formed by integrally attaching a color filter layer and an upper polarizing plate, the thin film transistor array substrate facing the color filter array substrate, the color filter array substrate, and the color filter array substrate. The liquid crystal layer is filled between the thin film transistor array substrate, and the lower polarizer formed on the lower surface of the thin film transistor array substrate.

Film type color filter, polarizer

Description

Color filter substrate and liquid crystal display using the same {COLOR FILTER SUBSTRATE AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

1 is a structural cross-sectional view showing a liquid crystal display device according to the prior art

Figure 2 is a structural cross-sectional view showing a color filter substrate according to the present invention

3 is a structural cross-sectional view showing a liquid crystal display device according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50 color filter array substrate 51 first protective layer

52 film-like color filter layer 53 first adhesive layer

54 compensation film 55 second adhesive layer

56: supporter layer 57: polarizer

58: second protective layer 59: antireflection film

60 third protective layer 70 thin film transistor array substrate

80 liquid crystal layer 71 lower polarizing plate

The present invention relates to a liquid crystal display device, and more particularly, to a color filter substrate in which a polarizing plate and a color filter are integrally formed, and a liquid crystal display device using the same.

As the information society develops, the demand for display devices is increasing in various forms.In recent years, liquid crystal display (LCD), plasma display panel (PDP), electro luminescent display (ELD), and vacuum fluorescent display (VFD) have been developed. Various flat panel display devices have been studied, and some are already used as display devices in various devices.

Among them, the LCD is the most widely used in place of a CRT (Cathode Ray Tube) for the purpose of a portable image display device because of its excellent image quality, light weight, thinness and low power consumption. A television for receiving and displaying a broadcast signal, and a monitor for a computer.

As described above, although various technical advances have been made in order for the liquid crystal display device to serve as a screen display device in various fields, the task of improving the image quality as the screen display device has many advantages and disadvantages.

Therefore, in order to use a liquid crystal display device in various parts as a general screen display device, the key to development is how much high definition images such as high definition, high brightness, and large area can be realized while maintaining the characteristics of light weight, thinness, and low power consumption. It can be said.

Hereinafter, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1 is a structural cross-sectional view showing a liquid crystal display device according to the prior art.

As shown in FIG. 1, a conventional liquid crystal display device includes upper and lower substrates 10 and 20 bonded to each other with a predetermined space, a liquid crystal layer formed between the upper and lower substrates, and the upper and lower substrates 10. And the upper and lower polarizers 11 and 21 coated on the outer surface of the 20 to linearly polarize visible light (natural light), respectively.

Although not shown in the drawing, a backlight unit is disposed below the lower polarizer 21.

Although not shown in the drawing, the lower substrate (TFT array substrate) 20 includes a plurality of gate wirings arranged in one direction at regular intervals and a plurality of gate wirings arranged at regular intervals in a direction perpendicular to the respective gate wirings. A plurality of pixel electrodes formed in a matrix form in each pixel region defined by intersections of the data wirings, the gate wirings and the data wirings, and the signals of the data wirings being switched by the signals of the gate wirings. A plurality of thin film transistors and a first alignment layer are formed on the lower substrate 20 including the pixel electrode to determine the alignment direction of the liquid crystal.

The upper substrate (color filter array substrate) 10 includes a black matrix layer 12 for blocking light in portions other than the pixel region, and an R, G, B color filter layer 13 for expressing color colors. The common electrode 14 for realizing an image and a second alignment layer formed on the common electrode 14 to determine the alignment direction of the liquid crystal are formed. At this time, in the transverse electric field type liquid crystal display, the common electrode 14 is formed on the lower substrate.

The common electrode and the pixel electrode formed on the upper and lower substrates 10 and 20, respectively, are transparent and electrically conductive, and a material having a high light transmittance, for example, a material such as indium tin oxide (ITO), is used. .

The upper and lower polarizers 11 and 21 are coated on the outer surface of the upper and lower substrates in a direction in which the transmission axes (absorption axes) cross each other, and the polarizers are formed of light to visualize the display pattern of the liquid crystal display. It is used on the upper and lower surfaces of the liquid crystal panel for the purpose of controlling the vibration direction.

Hereinafter, when the parts of the upper and lower polarizers that are generally used are arranged in order from the parts attached to the upper substrate 10 with respect to the configuration of the upper polarizer 21, the first protective layer 30 is shown in FIG. 1. , The first adhesive layer 31, the compensation film 32, the second adhesive layer 33, the second protective layer 34, the polarizer 35, the third protective layer 36, and the anti-reflection film 37 The fourth protective layer 38 is formed in order.

In this case, the polarizer 35 is made of a polyvinyl alcohol (PVA) -based polarizing film, and the second to third protective layers 34 and 36 are tri-acetyl cellulose (Tri-Acetyl-Cellulose): TAC).

 The first protective layer 30 protects the polarizing plate until the polarizing plate is attached to the upper substrate 10 of the liquid crystal display, and is removed when the first protective layer 30 is attached to the liquid crystal display.

In addition, one side edge of the black matrix layer and the color filter layers of R, G, and B are separately formed on the color filter array substrate.

On the other hand, as liquid crystal displays are used in various places, for example, thinner and lighter weights are desired for liquid crystal display devices such as mobile applications, and thinner and lighter weights are also desired for polarizing plates and color filters used therein.

However, as described above, a configuration in which a color filter is overlapped on one side of a polarizing plate and a black matrix layer composed of a plurality of protective layers and a support layer has a limitation in pursuing thinner and lighter weight.

The present invention has been made to solve the above problems, an object of the present invention is to form a polarizing plate and a color filter in one sheet (sheet) integrated into a thin filter substrate and a liquid crystal display device using the same To provide.

Color filter substrate according to the present invention for achieving the above object is a first protective layer, a film type color filter layer, a first adhesive layer, a compensation film, a second adhesive layer, a supporter layer, a polarizer, a second protective layer, reflection The prevention film and the third protective layer are laminated.

The polarizer is characterized in that the polyvinyl alcohol (Poly-vinyl-alcoho: PVA) -based polarizing film.

The supporter layer is characterized by using a film using a polymer material such as tri-acetyl-Cellulose (TAC), polyimide (polyester) or polyester (polyester).

The film type color filter layer is characterized in that the black matrix and the color filter layer of R, G, B is formed in a shape that can be wound around one film.

The second protective layer is characterized in that the tri-acetyl cellulose (Tri-Acetyl-Cellulose: TAC).

A liquid crystal display device according to the present invention including the color filter substrate includes a color filter array substrate formed by integrally attaching a color filter layer and an upper polarizing plate, the thin film transistor array substrate facing the color filter array substrate, and the color filter array. The liquid crystal layer is filled between the substrate and the thin film transistor array substrate, and a lower polarizer formed on the lower surface of the thin film transistor array substrate.

The color filter array substrate includes a first protective layer, a film type color filter layer, a first adhesive layer, a compensation film, a second adhesive layer, a supporter layer, a polarizer, a second protective layer, an antireflection film, and a third protective layer. It is characterized by.

The polarizer is characterized in that the polyvinyl alcohol (Poly-vinyl-alcoho: PVA) -based polarizing film.

The supporter layer is characterized by using a film using a polymer material such as tri-acetyl-Cellulose (TAC), polyimide (polyester) or polyester (polyester).

The film type color filter layer is characterized in that the black matrix and the color filter layers of R, G, and B are formed to be wound on one film.

The second protective layer is characterized in that the tri-acetyl cellulose (Tri-Acetyl-Cellulose: TAC).

An overcoat layer is further formed below the film type color filter layer.

Hereinafter, a color filter substrate and a liquid crystal display using the same according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a structural cross-sectional view showing a color filter substrate according to the present invention, Figure 3 is a structural cross-sectional view showing a liquid crystal display device according to an embodiment of the present invention.

As shown in FIG. 2, the color filter substrate according to the embodiment of the present invention may include a first protective layer 51, a film type color filter layer 52, a first adhesive layer 53, a compensation film 54, and a first protective layer 51. The adhesive layer 55, the supporter layer 56, the polarizer 57, the 2nd protective layer 58, the anti-reflective film 59, and the 3rd protective layer 60 are comprised in order.

At this time, the polarizer 57 is composed of a polyvinyl alcohol (Poly-vinyl-alcoho: PVA) polarizing film.

The supporter layer 56 is used to give mechanical strength to the color filter substrate in which the polarizing plate and the color filter layer are integrally formed. The supporter layer 56 may be further configured to further increase the thickness or to improve the mechanical strength. .

The supporter layer 56 may be made of triacetyl cellulose (Tri-Acetyl-Cellulose: TAC) or a film made of a polymer material such as polyimide or polyester.

The film type color filter layer 52 is formed in a shape such that a black matrix and color filter layers of R, G, and B can be wound in one film.

In the above, the first protective layer 51 is configured to protect the film-like color filter layer 52 until it is attached or contacted elsewhere.

The second protective layer 58 is composed of tri-acetyl-cellulose (TAC).

The anti-reflection film 59 is a film subjected to AG (Anti Glare) or AR (Anti Reflector) treatment.

As described above, the polarizing plate and the color filter layer are integrally formed in one sheet, which is advantageous for thinning.

In addition to the film type, the color filter layer may be replaced with various flexible color filter layers.

Next, a liquid crystal display device according to an embodiment of the present invention using a color filter substrate having the above configuration will be described.

As shown in FIG. 3, the liquid crystal display according to the present invention includes a color filter array substrate 50 formed by integrally attaching a color filter layer and an upper polarizing plate, and a thin film transistor array facing the color filter array substrate 50. The lower polarizing plate 71 formed on the lower surface of the liquid crystal layer 80 and the thin film transistor array substrate 70 filled between the substrate 70, the color filter array substrate 50, and the thin film transistor array substrate 70. It consists of.

In this case, the color filter array substrate 50 may include a first protective layer (not shown), a film type color filter layer 52, a first adhesive layer 53, a compensation film 54, a second adhesive layer 55, and a supporter layer. The polarizer 57, the second protective layer 58, the antireflection film 59, and the third protective layer 60 are formed in this order.

At this time, the polarizer 57 is composed of a polyvinyl alcohol (Poly-vinyl-alcoho: PVA) polarizing film.

The supporter layer 56 is applied to give the mechanical strength to the upper substrate in which the polarizing plate and the color filter layer are integrally formed. The supporter layer 56 may be further applied to increase the thickness or improve the mechanical strength.

The supporter layer 56 may be made of triacetyl cellulose (Tri-Acetyl-Cellulose: TAC) or a film made of a polymer material such as polyimide or polyester.

The film type color filter layer 52 is formed in a shape such that a black matrix and color filter layers of R, G, and B can be wound in one film.

In addition to the film type, the color filter layer may be replaced with various flexible color filter layers.

Although the first protective layer is not shown in the drawing, the first protective layer is configured to protect the film-type color filter layer 52 until it is attached or contacted elsewhere and applied to the upper substrate (color filter array substrate) of the liquid crystal display device. If you do, remove it.

In addition, the second protective layer 58 is formed of tri-acetyl cellulose (TAC).

As described above, since the polarizing plate and the color filter layer may be formed in one sheet, the liquid crystal display may be thinned.

Although not shown in the drawing, an overcoat layer may be added to the lower portion of the film type color filter layer 52 to prevent the film type color filter layer 52 from directly contacting the liquid crystal.

Although not shown, the thin film transistor array substrate 70 includes a plurality of gate wirings arranged in one direction at a predetermined interval, a plurality of data wirings arranged at regular intervals in a direction perpendicular to the respective gate wirings, and A plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing each of the gate wirings and the data wirings, and a plurality of pixels which are switched by signals of the gate wirings to transfer the signals of the data wirings to the pixel electrodes A first alignment layer is formed on the lower substrate 20 including the thin film transistor and the pixel electrode to determine the alignment direction of the liquid crystal.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention.

Accordingly, the technical scope of the present invention should not be limited to the contents described in the above embodiments, but should be determined by the claims.

The color filter substrate and the liquid crystal display device according to the present invention as described above have the following effects.

First, since the polarizing plate and the color filter layer can be integrated into one sheet, the color filter substrate and the liquid crystal display device can be thinned.

Second, since the polarizing plate and the color filter layer can be configured as one sheet, it is advantageous to apply to a roll-to-roll process.

Claims (12)

The first protective layer, the film type color filter layer, the first adhesive layer, the compensation film, the second adhesive layer, the supporter layer, the polarizer, the second protective layer, the anti-reflection film and the third protective layer are sequentially laminated, The first protective layer, the film type color filter layer, the first adhesive layer, the compensation film, the second adhesive layer, the supporter layer, the polarizer, and the second light are incident on the rear surface of the first protective layer. The light is transmitted and polarized in the order of the protective layer, the anti-reflection film and the third protective layer so that the polarized light is emitted to the entire surface of the third protective layer. The film type color filter layer is a color filter substrate, characterized in that the black matrix and R, G, B color filter layer is formed in a film form that can be wound on one film. The method of claim 1, The polarizer is a color filter substrate, characterized in that composed of polyvinyl alcohol (Poly-vinyl-alcoho: PVA) polarizing film. The method of claim 1, The supporter layer is a color filter substrate using a film made of a polymer material such as tri-acetyl cellulose (Tri-Acetyl-Cellulose (TAC)), polyimide (polyester) or polyester (polyester). delete The method of claim 1, The second protective layer is tri-acetyl cellulose (Tri-Acetyl-Cellulose: TAC), characterized in that the color filter substrate. A color filter array substrate formed by integrally attaching a color filter layer and an upper polarizing plate; A thin film transistor array substrate facing the color filter array substrate; A liquid crystal layer filled between the color filter array substrate and the thin film transistor array substrate; A lower polarizer formed on a lower surface of the thin film transistor array substrate, The color filter array substrate receives light from the liquid crystal layer to the rear surface of the color filter layer to transmit and polarize the light in the order of the color filter layer and the upper polarizing plate so that the polarized light is emitted to the front of the upper polarizing plate. , The color filter array substrate includes a black matrix and a film type color filter layer in which color filter layers of R, G, and B are wound on one film. The method of claim 6, The color filter array substrate The first protective layer, the film type color filter layer, the first adhesive layer, the compensation film, the second adhesive layer, the supporter layer, the polarizer, the second protective layer, the anti-reflection film and the third protective layer are sequentially laminated Liquid crystal display device. The method of claim 7, wherein The polarizer is a liquid crystal display, characterized in that the polyvinyl alcohol (Poly-vinyl-alcoho: PVA) -based polarizing film. The method of claim 7, wherein The supporter layer is a liquid crystal display device using a film using a polymer material such as tri-acetyl cellulose (TAC), polyimide (polyester) or polyester (polyester). delete The method of claim 7, wherein The second protective layer is tri- acetyl cellulose (Tri-Acetyl-Cellulose: TAC) characterized in that the liquid crystal display device. The method of claim 7, wherein An overcoat layer is further formed below the film type color filter layer.

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