KR101973156B1 - Liquid crystal display device and manufacturing method thereof - Google Patents

Abstract

A color filter including a light emitting body is disposed on the upper side of the upper polarizer, and a liquid crystal layer is disposed on a micro-spatial layer including a liquid crystal injection hole so that there is no deterioration of display characteristics due to a wide viewing angle or color mixing.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid crystal display (LCD)

The present invention relates to a liquid crystal display and a method of manufacturing the same.

The liquid crystal display device is one of the most widely used flat panel display devices and is composed of two display panels having an electric field generating electrode such as a pixel electrode and a common electrode and a liquid crystal layer interposed therebetween.

A voltage is applied to the electric field generating electrode to generate an electric field in the liquid crystal layer, thereby determining the orientation of the liquid crystal molecules in the liquid crystal layer and controlling the polarization of the incident light to display an image.

In a liquid crystal display device, a color filter is used to display color, and a structure in which a phosphor is included as a material of a color filter is being developed. When a light emitting device is included in a color filter, a liquid crystal display device having a wide viewing angle can be easily manufactured and power consumption can be improved. However, display characteristics are deteriorated due to color mixing with adjacent pixels.

Disclosure of Invention Technical Problem [8] The present invention provides a liquid crystal display device and a method of manufacturing the same that have no deterioration in display characteristics due to color mixture or have a wide viewing angle.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a backlight unit including a light source; And a liquid crystal layer disposed on the backlight unit, the liquid crystal layer being positioned within the micro-space layer, a color filter for changing the wavelength of light provided by the light source to display color, a lower polarizer plate disposed below the liquid crystal layer, And a display panel including an upper polarizer plate positioned between the layer and the color filter.

The display panel may include an upper display panel and a lower display panel, the lower display panel may include the liquid crystal layer and the lower polarizer, and the upper display panel may include the color filter.

The upper polarizer is included in the upper display panel or the lower display panel, the upper display panel is positioned on the upper polarizer, and the lower display panel is positioned on the lower part of the upper polarizer.

The polarizing plate may include a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

The micro-space layer is held by a support layer, an alignment layer is formed on the inner surface of the support layer, and the liquid crystal layer can be aligned by the alignment layer.

The supporting layer may further include a common electrode and a patterned insulating layer, and the liquid crystal injection hole may be formed in the patterned insulating layer, the common electrode, and the supporting layer.

The color filter may include quantum dot particles that convert the light provided by the light source.

The light source may be a blue light source.

The color filter for displaying blue among the color filters is a transparent color filter, and the transparent color filter may include scattering particles.

And a blue light transmitting layer for transmitting only light of a blue wavelength band may be formed under the color filter.

And a blue light blocking layer for blocking light of a blue wavelength band may be formed on the color filter.

The blue light blocking layer may not be formed on the transparent color filter.

The light source may be an ultraviolet light source.

An ultraviolet ray transmitting layer for transmitting only ultraviolet rays may be formed under the color filter.

And an ultraviolet blocking layer for blocking ultraviolet rays may be formed on the color filter.

The display panel may consist of one display panel.

The upper polarizer may include metal wires arranged at intervals of 100 nm or less.

According to another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device including forming a thin film transistor on a substrate, forming a pixel electrode on the thin film transistor, forming a sacrificial layer on the pixel electrode, Forming a micro-space layer including a liquid crystal injection hole by removing the sacrificial layer, injecting a liquid crystal material into the micro-space layer, forming a coating layer on the support member to cover the liquid crystal injection hole, And forming a color filter comprising quantum dot particles that convert light provided in the light source.

And forming an alignment layer on an outer wall of the micro space layer prior to injecting the liquid crystal material into the micro space layer.

Forming a common electrode between the support layer and the coating layer, and the liquid crystal injection hole may be formed on the common electrode.

As described above, the color filter including the light emitting body is placed on the upper side of the upper polarizer, and the liquid crystal layer is positioned on the micro-spatial layer including the liquid crystal injection hole so that there is no deterioration of the display characteristic due to the wide viewing angle or color mixing.

1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.
2 is a cross-sectional view of the liquid crystal display device according to the embodiment of FIG.
3 is a cross-sectional view of the lower panel in the liquid crystal display according to the embodiment of FIG.
FIGS. 4 to 14 are views showing a method of manufacturing the lower panel according to the embodiment of FIG. 3 in order.
15 is a cross-sectional view of the upper panel in the liquid crystal display according to the embodiment of FIG.
FIGS. 16 to 19 are views showing the manufacturing method of the upper panel according to the embodiment of FIG. 15 in order.
20 to 31 are graphs showing characteristics of a liquid crystal display device according to an embodiment of the present invention.
32 is an exploded perspective view of a liquid crystal display device according to another embodiment of the present invention.
33 is a cross-sectional view of the liquid crystal display device according to the embodiment of FIG.
34 is an exploded perspective view of a liquid crystal display device according to another embodiment of the present invention.
35 is a cross-sectional view of the liquid crystal display device according to the embodiment of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. Like parts are designated with like reference numerals throughout the specification. It will be understood that when an element such as a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the element directly over another element, Conversely, when a part is "directly over" another part, it means that there is no other part in the middle.

A liquid crystal display according to an embodiment of the present invention will now be described in detail with reference to FIGS. 1 and 2. FIG.

FIG. 1 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a liquid crystal display device according to the embodiment of FIG.

1, the liquid crystal display according to the embodiment of the present invention includes a lower panel 100, an upper panel 200, and a backlight unit 500.

The backlight unit 500 includes a blue light source 510 and a light guide plate 520. A lower panel 100 disposed thereon includes a lower polarizer 11, a lower substrate 110, a wiring layer 111, a liquid crystal layer 3 formed on a micro space layer, an upper insulating layer 310 and an upper polarizer 21, . The upper panel 200 located on the upper panel 210 includes an upper substrate 210, a blue light blocking layer 231, a color filter 230, and a blue light transmitting layer 232.

First, the lower panel 100 will be described with reference to FIGS.

3 is a cross-sectional view of the lower panel in the liquid crystal display according to the embodiment of FIG.

1 to 3, a wiring layer 111 including a thin film transistor (not shown) is formed on a substrate 110 made of transparent glass or plastic. The wiring layer 111 includes a gate line 121, a holding voltage line 131, a gate insulating film 140, a data line (not shown), a protective film (not shown) and a pixel electrode 190, The gate line 121 and the data line. The structure of the pixel electrode 190, the gate line 121, and the data line formed in the wiring layer 111 may vary according to the embodiment.

The gate line 121 and the sustaining voltage line 131 are located under the gate insulating layer 140 and are electrically isolated from each other and the data line is insulated from the gate line 121 and the sustaining voltage line 131. The gate electrode on the gate line 121 and the source electrode on the data line constitute a control terminal and an input terminal of the thin film transistor, respectively. The output terminal (drain electrode) of the thin film transistor is connected to the pixel electrode 190 and the pixel electrode 190 is isolated from the gate line 121, the holding voltage line 131 and the data line.

A supporting layer 311 is disposed on the pixel electrode 190 and the protective film. The supporting layer 311 serves to support the pixel electrode 190 and the upper space of the passivation layer (hereinafter referred to as the reference numeral 305 in FIG. 11) within the supporting layer 311. The support layer 311 has a trapezoidal cross section and may have a liquid crystal injection hole (see 335 in FIG. 14) on one side thereof in order to allow the liquid crystal to be contained in the fine space layer 305. The support layer 311, May include an inorganic insulating material such as silicon nitride (SiNx).

An alignment layer 12 is formed in the support layer 311, the pixel electrode 190, and the passivation layer in order to align the liquid crystal molecules injected into the micro space layer 305. The alignment layer 12 may be formed of at least one material commonly used as a liquid crystal alignment layer such as polyamic acid, polysiloxane, or polyimide.

A liquid crystal layer 3 is formed in the alignment layer 12 of the micro space layer 305 and the liquid crystal molecules 31 are initially arranged by the alignment layer 12. The thickness of the liquid crystal layer 3 may be about 5 to 6 mu m.

A light blocking member (BM) 220 is formed between the adjacent support layers 311. The light shielding member 220 includes a material that does not transmit light, has an opening, and the opening may correspond to the micro-space layer 305.

A common electrode 270 is formed on the support layer 311 and the light shielding member 220. The common electrode 270 and the pixel electrode 190 are formed of a transparent conductive material such as ITO or IZO to control an arrangement direction of the liquid crystal molecules 31 by generating an electric field.

A planarization layer 312 is formed on the common electrode 270. The planarization layer 312 may include an organic material as a layer for removing a step generated on the common electrode 270 due to the light shielding member 220. 1, the position of the planarization layer 312 may be located below the common electrode 270 and may be omitted.

A patterned insulating layer 313 is formed on the planarization layer 312. The patterned insulating layer 313 may comprise an inorganic insulating material such as silicon nitride (SiNx). The planarization layer 312 and the patterned insulating layer 313 are patterned together with the support layer 311 to form a liquid crystal injection hole 335. [ Depending on the embodiment, the patterned insulating layer 313 may be omitted.

In FIG. 1, the support layer 311, the planarization layer 312, and the patterned insulation layer 313 are shown as one upper insulation layer 310 in total. As shown in FIG. 2, in the embodiment of FIG. 2, the common electrode 270 is located between the supporting layer 311 and the planarization layer 312. However, according to the embodiment, the common electrode 270 is only required to be on top of the supporting layer 311 and may be located on the planarizing layer 312 or the patterned insulating layer 313. [

The upper polarizer 21 is disposed on the upper portion of the patterned insulating layer 313. The upper polarizer 21 is preferably thin, and may have a thickness of 150 to 200 mu m. The upper polarizer 21 includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

On the other hand, a lower polarizer 11 is attached to the back surface of the substrate 110. The lower polarizing plate 11 does not need to be formed thin and includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability. However, the position where the lower polarizer 11 is formed may be formed between the substrate 110 and the wiring layer 111, or may be formed at another position.

Hereinafter, a method of manufacturing the lower panel 100 will be described in detail with reference to FIG. 4 through FIG.

FIGS. 4 to 14 are views showing a method of manufacturing the lower panel according to the embodiment of FIG. 3 in order.

First, as shown in FIG. 4, a wiring layer 111 including a thin film transistor is formed on a lower substrate 110.

The lower substrate is made of transparent glass or plastic and the gate line 121, the holding voltage line 131, the gate insulating film 140, the data line (not shown), the protective film (not shown) And a pixel electrode 190. The thin film transistor is connected to the gate line 121 and the data line.

In FIG. 4, the wiring layer 111 is simply formed on the lower substrate 110, but actually, a plurality of processes are included.

For example:

A gate line 121 and a sustaining voltage line 131 are formed on the lower substrate 110 and then a gate insulating film 140 covering the lower substrate 110 and the gate line 121 and the sustaining voltage line 131 is formed do.

A data line is formed on the gate insulating film 140 in a direction crossing the gate line 121 and the holding voltage line 131 and a drain electrode which is an output terminal of the thin film transistor is also formed. Thereafter, a protective film is formed to cover the data line and the drain electrode, and a contact hole is also formed in the protective film to expose a part of the drain electrode.

A pixel electrode 190 is formed on the passivation layer and is electrically connected to the drain electrode through the contact hole of the passivation layer.

In FIG. 4, a plurality of processes as described above are implicitly shown, and the structure of the pixel electrode 190, the gate line 121, and the data line formed in the wiring layer 111 may vary according to the embodiment.

Then, referring to FIG. 5, a sacrifice layer 300 is formed in a region where the micro-space layer is to be formed. The sacrificial layer may be formed of a photoresist material and is formed by etching in accordance with the position, size, and shape of the micro-space layer. The micro-spatial layer corresponds to the pixel region since it is a position where the liquid crystal layer 3 is to be formed later.

6, a sacrificial layer 300 and a supporting layer 311 covering the exposed wiring layer 111 are formed. The support layer 311 may include an inorganic insulating material such as silicon nitride (SiNx), and may be formed to a thickness of about 2000 angstroms. The support layer 311 is formed so as to cover the sacrifice layer 300 entirely along the surface of the sacrifice layer 300 as shown in FIG. As shown in FIG. 6, the sacrifice layer 300 and the support layer 311 may have a trapezoidal cross-section.

Thereafter, as shown in Fig. 7, a light blocking member (BM) 220 is formed between adjacent support layers 311. [ The light shielding member 220 includes a material that does not transmit light, and has an opening. The opening of the light shielding member 220 corresponds to the sacrificial layer 300 or the fine space layer 305.

Thereafter, as shown in Fig. 8, the common electrode 270 covering the support layer 311 and the light shielding member 220 is formed. The common electrode 270 is formed of a transparent conductive material such as ITO or IZO like the pixel electrode 190 and controls the alignment direction of the liquid crystal molecules 31 by generating an electric field together with the pixel electrode 190 .

Thereafter, the lower planarization layer 312 is formed as shown in Fig. The lower planarization layer 312 includes an organic material as a layer for removing a step generated on the common electrode 270 due to the light shielding member 220.

Then, a patterned insulating layer 313 is formed on the lower planarization layer 312 as shown in Fig. The patterned insulating layer 313 is formed by laminating an inorganic insulating material such as silicon nitride (SiNx) to about 2000 angstroms and then patterning a silicon nitride (SiNx) layer stacked together with the lower planarization layer 312 and the supporting layer 311, Thereby forming an injection port (see 335 in Fig. 14). In Fig. 10, the liquid crystal injection port is not shown, but only because the cut portion does not pass through the liquid crystal injection port.

Thereafter, an etchant is supplied through the liquid crystal injection port to remove the sacrifice layer 300 located inside the support layer 311, thereby forming a microcavity 305 supported by the support layer 311. 11). Such a process can be performed by a wet etching method in which the lower panel 100 manufactured as shown in FIG. 10 is immersed in an etching solution such as a PR stripper for a predetermined time.

Thereafter, as shown in Fig. 12, an alignment film 12 is formed in the fine space 305. Then, as shown in Fig. In the method of forming the alignment layer 12 in the fine space 305, the alignment liquid in the liquid state is filled in the fine space 305 through the liquid crystal injection port by an ink jet or spin coating method, The solvent contained in the alignment liquid is blown and only the polyimide PI is cured on the inner surface of the support layer 311 to form the alignment film 12. [ The other alignment liquid is discharged through the liquid crystal injection port and removed.

Thereafter, as shown in Fig. 13, the liquid crystal layer 3 is filled in the fine space 305 in which the alignment film 12 is formed. The liquid crystal layer 3 is filled in the fine space 305 by providing a liquid crystal material by a spin coating method or an ink jet method and by using the surface energy of silicon nitride (SiNx) constituting the supporting layer 311 and the patterned insulating layer 313 And the capillary force generated in the liquid crystal injection port, the liquid crystal material is injected into the fine space 305. The injected liquid crystal molecules 31 are oriented in a certain direction by the alignment film 12. The thickness of the injected liquid crystal layer 3 may be about 5 to 6 mu m.

14, a coating layer 340 is formed on the lower panel 100 through an ultraviolet slit coating in order to block the liquid crystal injection hole 335 from the outside. The coating layer 340 is formed by a method of irradiating ultraviolet rays while being slit-coated with a transparent organic material, so that the liquid crystal injection hole 335 is clogged. The coating layer 340 shown in FIG. 14 is one method for blocking the liquid crystal injection hole 335, so that a coating layer is not necessarily required, and the liquid crystal injection hole 335 may not be blocked A separate device for blocking the liquid crystal injection port 335 may not be formed.

Then, as shown in FIG. 3, the upper polarizer 21 is formed on the upper part of the coating layer 340. The upper polarizer 21 is preferably thin, and may have a thickness of 100 to 200 mu m. The upper polarizer 21 includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

1, a lower polarizing plate 11 is attached to the back surface of the lower substrate 110. As shown in FIG. The lower polarizing plate 11 does not need to be formed thin and includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

 The lower panel 100 is completed by the above-described method. The completed lower panel 100 includes a liquid crystal layer 3, a common electrode 270, an orientation film 12, a pixel electrode 190, a lower polarizer 11 and an upper polarizer 21, Can be performed by the lower panel 100 as well. However, since there is no color filter 230 capable of displaying a color, the color can not be displayed. Hereinafter, the lower panel 100 is also referred to as a black and white liquid crystal panel.

Hereinafter, the upper panel 200 including the color filter 230 will be described in detail with reference to FIGS. 1, 2, and 15. FIG.

15 is a cross-sectional view of the upper panel in the liquid crystal display according to the embodiment of FIG.

An upper display panel 200 is positioned above the upper polarizer 21. [

Referring to FIGS. 1 and 2, the upper panel 200 has a blue light blocking layer 231 formed under the upper substrate 210 made of transparent glass or plastic. The blue light blocking layer 231 is not formed with the opening portion 231-1 only in the pixel region for displaying blue, and is formed in the pixel region for displaying red and green. The blue light blocking layer 231 can be formed by alternately laminating at least two layers having different refractive indexes. The blue light blocking layer 231 transmits wavelengths except the blue wavelength band and blocks the blue wavelength band. The blocked blue wavelength may be reflected to cause optical recycling. Since the blue light blocking layer 231 blocks the light emitted from the blue light source 510 from being directly emitted to the outside, the blue light blocking layer 231 is not formed only in the pixel region displaying blue, .

In the embodiment of the present invention, blue light is used as a light source, and an opening portion 231-1 is formed in a pixel region for displaying blue. However, depending on the embodiment, a red or green light source may be used. In this case, an opening is formed in the pixel region for displaying the color.

An upper shielding member 221 is formed under the upper substrate 210 and the blue light shielding layer 231. The upper shielding member 221 also has openings, and color filters corresponding to the colors displayed by the pixels are formed in the respective openings.

First, a red color filter 230R is formed on a red pixel, a green color filter 230G is formed on a green pixel, and a transparent color filter 230T is formed on a blue pixel. The reason why the transparent color filter 230T is used in the blue pixel is that the blue light source is used as the light source 510 of the backlight 500 used in the embodiment of FIGS.

The red color filter 230R may include red Quantum Dot (QD) particles 230RQD and converts the light of the wavelength provided by the blue light source 510 into red.

Further, the green color filter 230G may include green quantum dot (QD) particles 230GQD, and converts the light of the wavelength provided by the blue light source 510 to green.

The transparent color filter 230T includes scattering particles 235 that change the traveling direction of the light without changing the wavelength of the light of the wavelength provided by the blue light source 510. [ The scattering particles 235 may be particles such as TiO2 and the size of the scattering particles 235 may be equal to the size of the red quantum dot QD particles 230RQD or the green quantum dot QD particles 230GQD.

The light provided from the light source 510 of the backlight is scattered by the red QD particles 230RQD, the green QD particles 230GQD, and the scattering particles 235, Since the emitted image is displayed, the direction of the light emitted to the outside is wide, and the gradation of the light does not change according to the position, so that a wide viewing angle can be obtained.

The color filter 230 may extend along the columns of the pixel electrodes 190 and may have pixels of the same color in the column direction. In some embodiments, the color filters 230 are not limited to the three primary colors of red, green, and blue, cyan, magenta, yellow, and white colors may be displayed.

An upper planarization layer 250 is formed under the upper shielding member 221, the red color filter 230R, the green color filter 230G and the transparent color filter 230T. The top planarization layer 250 may be formed of an organic material and may be omitted depending on the embodiment.

A blue light transmitting layer 232 is formed under the upper planarizing layer 250 and is formed in a pixel displaying blue color unlike the blue light blocking layer 231. [ That is, in the entire area of the upper panel 200. The blue light transmitting layer 232 can also be formed by alternately laminating at least two layers having different refractive indexes, transmitting only the blue wavelength band and blocking the other wavelength bands. Light in the blocked wavelength band may be reflected and optical recycling may occur. The blue light transmitting layer 232 is formed to transmit blue light incident from the blue light source 510 as it is and to block light of other unnecessary wavelengths.

The lower panel 100 is positioned under the blue light transmitting layer 232 and the upper polarizing plate 21 and the blue light transmitting layer 232 of the lower panel 100 are attached and directly attached to each other, May be adhered.

Hereinafter, a method of manufacturing the upper panel 200 will be described with reference to FIGS.

FIGS. 16 to 19 are views showing the manufacturing method of the upper panel according to the embodiment of FIG. 15 in order.

A blue light blocking layer 231 is formed under the upper substrate 210 made of transparent glass or plastic, as shown in FIG. The blue light blocking layer 231 has an opening portion 231-1 and an opening portion 231-1 is formed only in a pixel region for displaying blue color. That is, the blue light blocking layer 231 is formed in the pixel region displaying red and green. The blue light blocking layer 231 may be a film formed by alternately laminating at least two layers having different refractive indexes. The blue light blocking layer 231 is formed by adhering it to the lower surface of the upper substrate 210. The blue light blocking layer 231 transmits a wavelength except for the blue wavelength band, blocks the blue wavelength band, and the blocked blue wavelength is reflected to perform optical recycling.

17, the color filter 230 is formed under the upper substrate 210 exposed by the blue light blocking layer 231 and the opening 231-1. In the manufacturing process of the color filter 230, the color filters exhibiting the same color are formed together, and in the case of the three color filters, a total of three color filter production processes are performed.

First, a method of forming a red color filter 230R on a red pixel will be described.

The red color filter 230R is formed by patterning a transparent organic material or a transparent photoresist by stacking a material including a plurality of red QD particles 230RQD that changes blue light into red light and leaves only the red pixel region.

Thereafter, a material including a plurality of green quantum dot (QD) grains (230GQD) that change blue light to green light is deposited on a transparent organic material or a transparent photoresist and patterned to leave only the green pixel region, thereby forming a green color filter 230G .

Thereafter, a transparent color filter 230T is formed by laminating a material including scattering particles 235 for dispersing incident light on a transparent organic material or a transparent photoresist, and patterning to leave only the blue pixel region. The scattering particles 235 are sufficient to disperse light, for example, TiO2 particles.

Thereafter, as shown in Fig. 18, the upper shielding member 221 is formed between the adjacent color filters 230. As shown in Fig. The upper shielding member 221 has an opening, and a color filter 230 is disposed in the opening. The upper shielding member 221 includes a material that does not transmit light. 18, the upper planarization layer 250 is formed below the upper shielding member 221, the red color filter 230R, the green color filter 230G, and the transparent color filter 230T . The top planarization layer 250 may be formed of an organic material.

Thereafter, as shown in Fig. 19, a blue light transmitting layer 232 is formed under the upper planarization layer 250. Then, as shown in Fig. The blue light transmitting layer 232 may also be a film formed by alternately laminating at least two layers having different refractive indexes. Unlike the blue light blocking layer 231, the blue light transmitting layer 232 is also formed on a pixel that displays blue light, so that the blue light transmitting layer 232 is attached to the entire area of the upper panel 200. The blue light transmitting layer 232 transmits only the blue wavelength band and blocks the other wavelength bands. Light in the blocked wavelength band may be reflected and optical recycling may occur. The blue light transmitting layer 232 may have a hermetic sealing property.

Thereafter, as shown in FIG. 2, the lower panel 100 is attached under the blue light transmitting layer 232. The upper polarizer 21 of the lower panel 100 and the blue light transmitting layer 232 of the upper panel 200 may be bonded directly or may be bonded together using a separate adhesive.

Referring back to FIG. 1, a backlight unit 500 is disposed under the lower polarizer 11, and the backlight unit includes a blue light source 510 and a light guide plate 520. A plurality of optical films may be formed on the upper portion of the light guide plate 520 and not shown below the lower polarizer plate 11.

1, the blue light source 510 is disposed on one side of the light guide plate 520. However, the light guide plate 520 may also be designed to be a direct-type lower light guide plate.

According to the above-described liquid crystal display device, the black and white liquid crystal display panel formed on the lower panel 100 is thinner than a general black and white liquid crystal display panel. In the case of a general liquid crystal display panel, the upper polarizer 21 remains as it is and includes a transparent substrate such as glass and has a thickness as much as the thickness of the substrate. As a result, the liquid crystal display according to the embodiment of the present invention is narrower than the case where the interval between the color filter 230 of the upper panel 200 and the liquid crystal layer 3 of the lower panel 100 is small, and the possibility of color mixture is small.

In addition, the liquid crystal display according to the embodiment of the present invention has a wider viewing angle characteristic because the direction of light advances by using the quantum dot (QD) color filter 230.

The display characteristics according to the embodiment of the present invention will be described with reference to FIGS. 20 to 33 below.

20 to 33 are graphs showing characteristics of a liquid crystal display device according to an embodiment of the present invention.

20 and 21, a viewing angle characteristic of the liquid crystal display device according to an embodiment of the present invention will be described.

20 shows the wavelength spectrum of blue light and the spectrum of light whose wavelength has been converted through the red color filter 230R and the green color filter 230G. In FIG. 21, the viewing angle characteristics of the blue light emitted from the backlight and the red color And the viewing angle characteristics of light passing through the filter 230R and the green color filter 230G.

First, as shown in FIG. 20, the light emitted from the blue light source 510 of the backlight unit 500 has an adjacent wavelength around a wavelength of 450 nm. It can also be seen that the light passing through the red color filter 230R and the green color filter 230G has a wavelength value adjacent to the wavelength of 630 nm and a wavelength value adjacent to the wavelength of 530 nm. Since each center wavelength value is a wavelength value indicating blue, red and green, the liquid crystal display according to the embodiment of the present invention displays a color around the wavelength.

In the liquid crystal display according to the embodiment of the present invention, the light provided by the blue light source 510 is refracted by the red QD particles 230RQD, the green QD particles 230GQD and the scattering particles 235, , And a light viewing angle is obtained because the light travels to the outside.

21, the viewing angle of the light provided by the blue light source 510 and the light transmitted through the red color filter 230R and the green color filter 230G is shown. The light transmitted through the red color filter 230R and the green color filter 230G is changed in the direction of light progression from the red quantum dot QD particle 230RQD and the green quantum dot QD particle 230GQD The luminance of about 70% of the maximum luminance can be exhibited even at the left and right 60 degrees as shown in Fig. In FIG. 21, only the light of the blue light source 510 is shown and the viewing angle is narrow. However, since the light passing through the transparent color filter 230T is refracted and scattered by the scattering particles 235, And a viewing angle similar to that of red and green light. That is, in general liquid crystal display devices, the direction of light provided by the light source is not changed. However, in the case of using the color filter 230 including the fluorescent material as in the embodiment of the present invention, the fluorescent material (such as quantum dot particles or scattering particles) The viewing angle on the side surface is improved by changing the traveling direction of the light.

 Hereinafter, the optical characteristics of the blue light-transmitting layer 232 and the blue light-blocking layer 231 will be described with reference to FIGS. 22 and 23. FIG.

First, FIG. 22 shows the characteristics of the blue light blocking layer 231. The blue light blocking layer 231 has a property of blocking blue light so that it does not transmit, but reflects blue light instead. That is, in FIG. 22, the transmittance and the reflectance of the blue light blocking layer 231 are shown together with the wavelength spectrum corresponding to each color. As a result, the blue light blocking layer 231 transmits red and green light but blocks blue light and reflects it.

On the other hand, in FIG. 23, the transmittance characteristic of the blue light transmitting layer 232 is shown. 23, the characteristic of transmitting light adjacent to the center at 450 nm is shown. The other red and green wavelength lights are blocked.

Based on the characteristics shown in Figs. 22 and 23, the blue light blocking layer 231 and the blue light transmitting layer 232 used in the embodiment of the present invention block blue light, respectively, And blocks components other than the blue light provided by the light source, thereby improving the purity of light applied to the color filter 230.

Hereinafter, a method for preventing color mixture of light in a liquid crystal display device according to an embodiment of the present invention will be described in detail with reference to FIGS.

24 and 25 illustrate the characteristics of transmitted light according to the angle at which blue light is incident on the blue light transmitting layer 232 of the upper panel 200. FIG.

In FIGS. 24 and 25, when the incident angle is 0, the incident light is perpendicular to the blue light transmitting layer 232. When the incident angle is 80, the incident light is incident at an angle of 80 degrees to the normal line perpendicular to the blue light transmitting layer 232 .

FIG. 24 shows the wavelength change of the transmitted light according to the incident angle, and FIG. 25 shows the transmittance of the blue light according to the incident angle.

In FIG. 24, when the incident angle is 0 degree, the wavelength of the incident light is maintained as it is in the blue wavelength band. However, as the incident angle increases, the wavelength of the incident light is relatively shortened so that the blue light transmitting layer 232 can not be transmitted have. As a result, only the light incident vertically (at an incident angle of 0 degrees) is transmitted through the blue light transmitting layer 232. When the incident angle is large, the blue light transmitting layer 232 is not transmitted and is reflected and used for optical recycling. 25, it is confirmed that 90% of the light emitted from the blue light source 510 of the backlight unit 500 is transmitted. However, as the incident angle increases, the transmittance of the transmitted light is small, And the rest is reflected.

Due to the characteristics of the blue light transmitting layer 232, only the blue light is transmitted, and light of other wavelengths (light incident at an angle more than a certain angle) is reflected so that only the light corresponding to the vertical is incident on the color filter 230 Avoid color mixing. That is, the mixed color is a case in which light transmitted through adjacent pixels is incident on the color filter 230 of the pixel. Since the light is incident on the blue light transmitting layer 232 at an angle, it does not transmit the blue light transmitting layer 232 It prevents mixing.

Hereinafter, color mixing will be described in more detail with reference to FIGS. 26 to 31. FIG.

Fig. 26 shows the layered relationship in the periphery in order to clearly observe the parallax. The light emitted from the liquid crystal layer 3 of the lower panel 100 passes through the upper polarizer 21 and enters the color filter 230. The color represented by the color of the color filter 230 passing through the upper panel It changes. That is, there is no problem in passing through the color filter 230 of the pixel, but when the light advances to the side, the color passes through the adjacent color filter 230 and color mixture occurs. In the embodiment of the present invention, although the blue light transmitting layer 232 blocks this color mixture to some extent, a numerical value capable of preventing color mixing regardless of the blue light transmitting layer 232 is sought.

26, the width of the color filter 230 is 105.5 mu m, the width of the light shielding member 220 is 29 mu m, the PPI (pixel per inch) is 63, the size of the pixel pixel size) is 403.5 mu m, and the sub pixel size is 134.5 mu m.

In the embodiment of FIG. 26, the vertical distance d between the color filter 230 and the liquid crystal layer 3 and the characteristics according to the divergence half angle are shown in FIGS. 27 and 28. FIG.

27 shows a change in the intensity of light with respect to a viewing angle according to a change in the vertical distance d between the color filter 230 and the liquid crystal layer 3 when the spreading angle is 80 degrees . When the intensity of the light is 0, it means that the light is blocked by the light shielding member 220 at the viewing angle. Therefore, the intensity of the light is increased to 0 and then increased again to mean that the light advances to the adjacent color filter 230 do. 27 shows only a case where the vertical distance d between the color filter 230 and the liquid crystal layer 3 is 10 占 퐉 and the vertical distance d between the color filter 230 and the liquid crystal layer 3 (d) shows that the shorter the possibility of mixing, the smaller the possibility.

28 shows a change in the intensity of light with respect to the viewing angle according to the spread angle in a state where the vertical distance d between the color filter 230 and the liquid crystal layer 3 is fixed at 200 占 퐉 It is. In the graph of FIG. 28, the intensity of light is increased to 0 again, which means that the light advances to the adjacent color filter 230, so that the case where the intensity is constantly decreased does not cause color mixing. In this case, too, the spreading angle is only 20 degrees in FIG. 28, and it is clearly shown that the smaller the diffusion angle, the lower the possibility of color mixing.

29 and 30 show the frequency of occurrence of the color mixture depending on the spread angle on the basis of these contents.

29, when the PPI value is 63, the vertical distance d between the color filter 230 and the liquid crystal layer 3 is varied. As shown in FIG. 29, when the color mixture does not occur, it can be seen that the vertical distance d between the color filter 230 and the liquid crystal layer 3 is only 10 μm.

In Fig. 30, the vertical distance d between the color filter 230 and the liquid crystal layer 3 is fixed at 200 mu m and the PPI is measured. According to FIG. 30, although all color mixture occurs, the smaller the spread angle, the less the color mixture does not occur regardless of the PPI value. If the PPI value is small, the smaller the color mixture, Can be confirmed.

In the present invention, the vertical distance d between the color filter 230 and the liquid crystal layer 3 is reduced to prevent color mixing. 2, the upper polarizer 21 occupies the largest thickness between the color filter 230 and the liquid crystal layer 3 and has a thickness of 100 to 200 탆. Therefore, in the embodiment of FIG. 2 of the present invention, the vertical distance d between the color filter 230 and the liquid crystal layer 3 is 100 to 200 占 퐉, ).

FIG. 31 shows how the color mixture can be improved by reducing the vertical distance d between the color filter 230 and the liquid crystal layer 3 as described above.

31 shows a case where the spreading angle is 80 degrees or less and the vertical distance d between the color filter 230 and the liquid crystal layer 3 is 500 mu m or less and when the spread angle is 55 degrees or less, And the vertical distance d between the light-emitting layer 3 and the light-emitting layer 3 is 100 탆 or less.

As shown in Fig. 31, when the vertical distance d between the color filter 230 and the liquid crystal layer 3 is 500 mu m or less, it is shown that the color mixture occurs several times as the viewing angle changes. However, 230 and the liquid crystal layer 3 is 100 m or less, the color mixture hardly occurs.

As shown in FIG. 31, in the present invention, only the upper polarizer 21 is formed as a layer having a large thickness between the color filter 230 and the liquid crystal layer 3, have.

Hereinafter, another embodiment different from the embodiment of FIGS. 1 and 2 will be described with reference to FIGS. 32 to 35. FIG.

First, another embodiment according to Fig. 32 and Fig. 33 will be described.

FIG. 32 is an exploded perspective view of a liquid crystal display device according to another embodiment of the present invention, and FIG. 33 is a sectional view of the liquid crystal display device according to the embodiment of FIG.

The embodiment of FIG. 32 includes an ultraviolet light source 510 'as a light source unlike the embodiment of FIG. As a result, the polarizing plates 11 'and 21' have a property of polarizing ultraviolet rays and include an ultraviolet blocking layer 231 'and an ultraviolet transmitting layer 232' in the upper panel 200. In addition, the quantum dot particles included in the color filter 230 'change the wavelength of ultraviolet light to change to red, green, and blue. In the embodiment of FIG. 32, the upper polarizer 21 'is included in the upper panel 200.

32, a liquid crystal display according to another embodiment of the present invention includes a lower display panel 100, an upper display panel 200, and a backlight unit 500.

The backlight unit 500 includes an ultraviolet light source 510 'and a light guide plate 520. The lower panel 100 disposed thereon includes a lower polarizer 11 ', a lower substrate 110, a wiring layer 111, a liquid crystal layer 3 formed on a micro space layer, and an upper insulating layer 310. The upper panel 200 located on the upper panel 200 includes an upper polarizer 21 ', an upper substrate 210, an ultraviolet barrier layer 231', a color filter 230 ', and an ultraviolet transparent layer 232' .

The liquid crystal display according to the embodiment of FIG. 32 will now be described in detail with reference to FIG.

First, the lower panel 100 will be described with reference to FIG.

A wiring layer 111 including a thin film transistor (not shown) is formed on a substrate 110 made of transparent glass or plastic. The wiring layer 111 includes a gate line 121, a holding voltage line 131, a gate insulating film 140, a data line (not shown), a protective film (not shown) and a pixel electrode 190, The gate line 121 and the data line. The structure of the pixel electrode 190, the gate line 121, and the data line formed in the wiring layer 111 may vary according to the embodiment.

The gate line 121 and the sustaining voltage line 131 are located under the gate insulating layer 140 and are electrically isolated from each other and the data line is insulated from the gate line 121 and the sustaining voltage line 131. The gate electrode on the gate line 121 and the source electrode on the data line constitute a control terminal and an input terminal of the thin film transistor, respectively. The output terminal (drain electrode) of the thin film transistor is connected to the pixel electrode 190 and the pixel electrode 190 is isolated from the gate line 121, the holding voltage line 131 and the data line.

A supporting layer 311 is disposed on the pixel electrode 190 and the protective film. The supporting layer 311 serves to support the pixel electrode 190 and the upper space of the passivation layer (hereinafter referred to as the reference numeral 305 in FIG. 11) within the supporting layer 311. The supporting layer 311 has a trapezoidal cross section and may have a liquid crystal injection hole on one side thereof to allow the liquid crystal to be contained in the fine space layer 305. The supporting layer 311 may be made of silicon nitride Of an inorganic insulating material.

An alignment layer 12 is formed in the support layer 311, the pixel electrode 190, and the passivation layer in order to align the liquid crystal molecules injected into the micro space layer 305. The alignment layer 12 may be formed of at least one material commonly used as a liquid crystal alignment layer such as polyamic acid, polysiloxane, or polyimide.

A liquid crystal layer 3 is formed in the alignment layer 12 of the micro space layer 305 and the liquid crystal molecules 31 are initially arranged by the alignment layer 12. The thickness of the liquid crystal layer 3 may be about 5 to 6 mu m.

A light blocking member (BM) 220 is formed between the adjacent support layers 311. The light shielding member 220 includes a material that does not transmit light, has an opening, and the opening may correspond to the micro-space layer 305.

A common electrode 270 is formed on the support layer 311 and the light shielding member 220. The common electrode 270 and the pixel electrode 190 are formed of a transparent conductive material such as ITO or IZO to control an arrangement direction of the liquid crystal molecules 31 by generating an electric field.

A planarization layer 312 is formed on the common electrode 270. The planarization layer 312 may include an organic material as a layer for removing a step generated on the common electrode 270 due to the light shielding member 220.

A patterned insulating layer 313 is formed on the planarization layer 312. The patterned insulating layer 313 may comprise an inorganic insulating material such as silicon nitride (SiNx). The planarization layer 312 and the patterned insulating layer 313 are patterned together with the support layer 311 to form a liquid crystal injection hole 335. [ Depending on the embodiment, the patterned insulating layer 313 may be omitted. In FIG. 32, the support layer 311, the planarization layer 312, and the patterned insulating layer 313 are shown as one upper insulating layer 310 in total.

On the other hand, a lower polarizer 11 'is attached to the back surface of the substrate 110. The lower polarizer 11 'transmits only one direction of the ultraviolet rays. In addition, the lower polarizer 11 'does not need to be formed thin and includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

Hereinafter, the upper panel 200 will be described.

On the patterned insulating layer 313, the upper panel 200 is located.

Referring to FIGS. 33 and 34, the upper panel 200 has an ultraviolet barrier layer 231 'formed under the upper substrate 210 made of transparent glass or plastic. The ultraviolet blocking layer 231 'is formed on the pixel region displaying blue, red and green. The ultraviolet blocking layer 231 'may be formed by alternately laminating at least two layers having different refractive indexes. The ultraviolet blocking layer 231' transmits wavelengths except the ultraviolet wavelength band and blocks the ultraviolet wavelength band. The blocked ultraviolet light may be reflected to cause optical recycling. The ultraviolet blocking layer 231 'blocks the light emitted from the ultraviolet light source 510' from being directly emitted to the outside.

An upper shielding member 221 is formed under the upper substrate 210 and the ultraviolet blocking layer 231 '. The upper shielding member 221 also has an opening, and a color filter 230 'corresponding to the color displayed by the corresponding pixel is formed in each opening.

First, a red color filter 230R 'is formed on a red pixel, a green color filter 230G' is formed on a green pixel, and a blue color filter 230B 'is formed on a blue pixel.

The red color filter 230R 'may include a red Quantum Dot (QD) particle 230RQD', and converts the light of the wavelength provided by the ultraviolet light source 510 'to red.

In addition, the green color filter 230G 'may include green quantum dot (QD) particles 230GQD' and convert the light of the wavelength provided by the ultraviolet light source 510 'to green.

The blue color filter 230B 'may include blue quantum dot (QD) particles 230BQD', and converts the light of the wavelength provided by the ultraviolet light source 510 'to blue.

In the embodiment of the present invention, the light provided from the ultraviolet light source 510 'of the backlight is emitted from the red QD particles 230RQD, the green QD particles 230GQD and the blue QD particles 230BQD' Green, and blue, respectively, and then emitted to the outside to display an image. Therefore, the direction of light emitted to the outside is wide, and the gradation of light does not change according to the position, so that a wide viewing angle can be obtained.

An upper planarization layer 250 is formed under the upper shielding member 221, the red color filter 230R ', the green color filter 230G', and the blue color filter 230B '. The top planarization layer 250 may be formed of an organic material and may be omitted depending on the embodiment.

An ultraviolet ray transmitting layer 232 'is formed under the upper planarizing layer 250 and is formed in all pixel regions like the ultraviolet blocking layer 231'. The ultraviolet transmitting layer 232 'may also be formed by alternately laminating at least two layers having different refractive indexes, and only the ultraviolet wavelength band is blocked and the other wavelength band is blocked. Light in the blocked wavelength band may be reflected and optical recycling may occur.

An upper polarizer 21 'is positioned under the ultraviolet-transmitting layer 232'. The upper polarizer 21 'transmits only one direction of the ultraviolet rays. Further, the upper polarizer 21 'is preferably formed to be thin, and may have a thickness of 150 to 200 탆. The upper polarizer 21 includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

The lower panel 100 is positioned under the upper polarizer 21 'and the uppermost layer 313 of the lower panel 100 and the upper polarizer 21' are directly attached to each other, As shown in Fig.

1 and FIG. 32, it can be seen that the upper polarizer 21, 21 'is included in the upper display panel or the lower display panel, and the upper display panel is positioned on the upper polarizer 21, 21' It can also be said that the lower panel is located below the upper polarizer plates 21 and 21 '.

Referring back to FIG. 32, a backlight unit 500 is positioned below the lower polarizer 11, and the backlight unit includes an ultraviolet light source 510 'and a light guide plate 520. A plurality of optical films may be formed on the upper portion of the light guide plate 520 and not shown below the lower polarizer plate 11.

According to the liquid crystal display device described above, the substrate is not additionally included, and the thickness thereof is thin. As a result, the liquid crystal display according to the embodiment of the present invention is narrower in the interval between the color filter 230 'of the upper panel 200 and the liquid crystal layer 3 of the lower panel 100, .

In addition, the liquid crystal display according to the embodiment of the present invention has wide viewing angle characteristics because the direction of light advances by using the quantum dot (QD) color filter 230 '.

Hereinafter, another embodiment according to FIG. 34 and FIG. 35 will be described.

FIG. 34 is an exploded perspective view of a liquid crystal display device according to another embodiment of the present invention, and FIG. 35 is a sectional view of a liquid crystal display device according to the embodiment of FIG.

34 and 35, unlike the embodiment of FIG. 1, includes an ultraviolet light source 510 'as a light source. The lower polarizer 11 'has a property of polarizing ultraviolet rays. In order to reduce the thickness of the upper polarizer 21-1, metal wires 21-2 such as aluminum are located at intervals of 100 nm or less, . 34 and 35 do not form the upper polarizer 21 and instead use a polarizer including a metal wiring, the thickness of the polarizer can be reduced to about 5 to 10 mu m, and the possibility of color mixing is greatly reduced .

In addition, the upper panel 200 includes an ultraviolet blocking layer 231 '. In addition, the quantum dot particles included in the color filter 230 'change the wavelength of ultraviolet light to change to red, green, and blue. In the embodiments of FIGS. 34 and 35, all the layers are stacked on one substrate and constituted of one display panel.

As shown in FIGS. 34 and 35, the liquid crystal display according to another embodiment of the present invention includes a display panel 100 'and a backlight unit 500.

The backlight unit 500 includes an ultraviolet light source 510 'and a light guide plate 520. The display panel 100 'positioned thereon includes a lower polarizer 11', a lower substrate 110, a wiring layer 111, a liquid crystal layer 3 formed on the micro space layer, an upper insulating layer 310, an upper polarizer 21 -1), a color filter 230 ', and an ultraviolet blocking layer 231'. In the embodiment of Figs. 35 and 36, the ultraviolet transmitting layer is omitted, unlike the embodiment of Fig.

The liquid crystal display according to the embodiment of FIG. 34 will be described in more detail with reference to FIG.

The integrated type display panel 100 'will be described with reference to FIG.

A wiring layer 111 including a thin film transistor (not shown) is formed on a substrate 110 made of transparent glass or plastic. The wiring layer 111 includes a gate line 121, a holding voltage line 131, a gate insulating film 140, a data line (not shown), a protective film (not shown) and a pixel electrode 190, The gate line 121 and the data line. The structure of the pixel electrode 190, the gate line 121, and the data line formed in the wiring layer 111 may vary according to the embodiment.

The gate line 121 and the sustaining voltage line 131 are located under the gate insulating layer 140 and are electrically isolated from each other and the data line is insulated from the gate line 121 and the sustaining voltage line 131. The gate electrode on the gate line 121 and the source electrode on the data line constitute a control terminal and an input terminal of the thin film transistor, respectively. The output terminal (drain electrode) of the thin film transistor is connected to the pixel electrode 190 and the pixel electrode 190 is isolated from the gate line 121, the holding voltage line 131 and the data line.

A supporting layer 311 is disposed on the pixel electrode 190 and the protective film. The supporting layer 311 serves to support the pixel electrode 190 and the upper space of the passivation layer (hereinafter referred to as the reference numeral 305 in FIG. 11) within the supporting layer 311. The supporting layer 311 has a trapezoidal cross section and may have a liquid crystal injection hole on one side thereof to allow the liquid crystal to be contained in the fine space layer 305. The supporting layer 311 may be made of silicon nitride Of an inorganic insulating material.

An alignment layer 12 is formed in the support layer 311, the pixel electrode 190, and the passivation layer in order to align the liquid crystal molecules injected into the micro space layer 305. The alignment layer 12 may be formed of at least one material commonly used as a liquid crystal alignment layer such as polyamic acid, polysiloxane, or polyimide.

A liquid crystal layer 3 is formed in the alignment layer 12 of the micro space layer 305 and the liquid crystal molecules 31 are initially arranged by the alignment layer 12. The thickness of the liquid crystal layer 3 may be about 5 to 6 mu m.

A light blocking member (BM) 220 is formed between the adjacent support layers 311. The light shielding member 220 includes a material that does not transmit light, has an opening, and the opening may correspond to the micro-space layer 305.

A common electrode 270 is formed on the support layer 311 and the light shielding member 220. The common electrode 270 and the pixel electrode 190 are formed of a transparent conductive material such as ITO or IZO to control an arrangement direction of the liquid crystal molecules 31 by generating an electric field.

A planarization layer 312 is formed on the common electrode 270. The planarization layer 312 may include an organic material as a layer for removing a step generated on the common electrode 270 due to the light shielding member 220.

A patterned insulating layer 313 is formed on the planarization layer 312. The patterned insulating layer 313 may comprise an inorganic insulating material such as silicon nitride (SiNx). The planarization layer 312 and the patterned insulating layer 313 are patterned together with the support layer 311 to form a liquid crystal injection hole 335. [ Depending on the embodiment, the patterned insulating layer 313 may be omitted. 34, the supporting layer 311, the planarization layer 312, and the patterned insulating layer 313 are shown as one upper insulating layer 310 in total.

The upper polarizer plate 21-1 is located on the patterned insulating layer 313. [ In order to reduce the thickness of the upper polarizer 21-1, a metal wiring 21-2 made of aluminum or the like is disposed at an interval of 100 nm or less and has a characteristic of polarizing light. 34 and 35 do not form the upper polarizer 21 and instead use a polarizer including a metal wiring, the thickness of the polarizer can be reduced to about 5 to 10 mu m, and the possibility of color mixing is greatly reduced .

An upper shielding member 221 is formed on the upper polarizer 21-1. The upper shielding member 221 also has an opening, and a color filter 230 'corresponding to the color displayed by the corresponding pixel is formed in each opening.

First, a red color filter 230R 'is formed on a red pixel, a green color filter 230G' is formed on a green pixel, and a blue color filter 230B 'is formed on a blue pixel.

The red color filter 230R 'may include a red Quantum Dot (QD) particle 230RQD', and converts the light of the wavelength provided by the ultraviolet light source 510 'to red.

In addition, the green color filter 230G 'may include green quantum dot (QD) particles 230GQD' and convert the light of the wavelength provided by the ultraviolet light source 510 'to green.

The blue color filter 230B 'may include blue quantum dot (QD) particles 230BQD', and converts the light of the wavelength provided by the ultraviolet light source 510 'to blue.

In the embodiment of the present invention, the light provided from the ultraviolet light source 510 'of the backlight is emitted from the red QD particles 230RQD, the green QD particles 230GQD and the blue QD particles 230BQD' Green, and blue, respectively, and then emitted to the outside to display an image. Therefore, the direction of light emitted to the outside is wide, and the gradation of light does not change according to the position, so that a wide viewing angle can be obtained.

An upper planarization layer 250 is formed on the upper shielding member 221, the red color filter 230R ', the green color filter 230G', and the blue color filter 230B '. The top planarization layer 250 may be formed of an organic material and may be omitted depending on the embodiment.

An ultraviolet blocking layer 231 'is formed on the upper planarizing layer 250. The ultraviolet blocking layer 231 'is formed on the pixel region displaying blue, red and green. The ultraviolet blocking layer 231 'may be formed by alternately laminating at least two layers having different refractive indexes. The ultraviolet blocking layer 231' transmits wavelengths except the ultraviolet wavelength band and blocks the ultraviolet wavelength band. The blocked ultraviolet light may be reflected to cause optical recycling. The ultraviolet blocking layer 231 'blocks the light emitted from the ultraviolet light source 510' from being directly emitted to the outside.

On the other hand, a lower polarizer 11 'is attached to the back surface of the substrate 110. The lower polarizer 11 'transmits only one direction of the ultraviolet rays. In addition, the lower polarizer 11 'does not need to be formed thin and includes a polarizing element for generating polarized light and a triacetyl-cellulose (TAC) layer for ensuring durability.

Referring back to FIG. 34, a backlight unit 500 is positioned below the lower polarizer 11, and the backlight unit includes an ultraviolet light source 510 'and a light guide plate 520. A plurality of optical films may be formed on the upper portion of the light guide plate 520 and not shown below the lower polarizer plate 11.

That is, in the embodiment of FIGS. 34 and 35, only one substrate 110 is used to reduce the thickness of the entire liquid crystal display device, and the upper polarizer plate 21 -1) is changed to a structure including a metal wiring, and the thickness thereof is greatly reduced, thereby remarkably reducing the possibility of color mixture.

In addition, the liquid crystal display according to the embodiment of the present invention has wide viewing angle characteristics because the direction of light advances by using the quantum dot (QD) color filter 230 '.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: Lower display panel 100 ': Integrated display panel
11, 11 ', 21, 21', 21-1: polarizer 12: alignment film
21-2: metal wiring 110, 210: insulating substrate
111: wiring layer 200: upper panel
220, 221: Shading member 230, 230 ': Color filter
230T: Transparent color filter 235: Scattering particle
231: blue light blocking layer 231-1: opening
232: blue light transmitting layer 190: pixel electrode
231 ': ultraviolet blocking layer 232': ultraviolet transmitting layer
250: upper planarization layer 270: common electrode
3: liquid crystal layer 300: sacrificial layer
305: fine space 31: liquid crystal molecule
310: upper insulating layer 311: supporting layer
312: planarization layer 313: patterned insulating layer
335: liquid crystal injection port 340: coating layer
500: backlight unit 510: blue light source
510 ': ultraviolet light source 520: light guide plate

Claims (20)

A backlight unit including a light source;
A first substrate and a second substrate overlapping each other;
A liquid crystal layer disposed between the first substrate and the second substrate;
A red color filter positioned between the liquid crystal layer and the second substrate and including red quantum dots;
A green color filter located between the liquid crystal layer and the second substrate and including green quantum dots;
A transparent color filter positioned between the liquid crystal layer and the second substrate; And
A blue light blocking layer positioned between the red color filter and the second substrate and between the green color filter and the second substrate,
And a blue light transmitting layer positioned between the transparent color filter and the liquid crystal layer and transmitting only light in a blue wavelength band
Liquid crystal display device.
The method of claim 1,
Wherein the light source is a blue light source.
The method of claim 1,
A lower polarizer disposed between the first substrate and the backlight unit, and
And an upper polarizer disposed between the liquid crystal layer and the red color filter.
4. The method of claim 3,
Wherein at least one of the upper polarizer and the lower polarizer comprises a triacetyl cellulose (TAC) layer.
The method of claim 1,
And the blue light transmitting layer overlaps the front surface of the second substrate.
The method of claim 1,
And the blue light transmitting layer overlaps the red color filter, the green color filter, and the transparent color filter.
The method of claim 1,
Wherein the blue light transmitting layer includes at least two layers having different refractive indices.
4. The method of claim 3,
And the blue light transmitting layer overlaps with the upper polarizer.
The method of claim 1,
Wherein the blue light blocking layer includes at least two layers having different refractive indices.
The method of claim 9,
And the blue light blocking layer reflects blue light.
The method of claim 1,
Wherein the transparent color filter comprises scattering particles.
12. The method of claim 11,
The scattering particles have a liquid crystal display including the TiO _2.
The method of claim 1,
And the blue light blocking layer is not positioned between the transparent color filter and the second substrate.
A backlight unit including a light source;
A first substrate and a second substrate overlapping each other;
A liquid crystal layer disposed between the first substrate and the second substrate;
A red color filter positioned between the liquid crystal layer and the second substrate and including red quantum dots;
A green color filter located between the liquid crystal layer and the second substrate and including green quantum dots;
A transparent color filter positioned between the liquid crystal layer and the second substrate;
A blue light blocking layer positioned between the red color filter and the second substrate and between the green color filter and the second substrate,
A lower polarizer disposed between the first substrate and the backlight unit,
And a display panel including an upper polarizer disposed between the liquid crystal layer and the red color filter,
Wherein the upper polarizer includes a plurality of metal wirings.
The method of claim 14,
And a blue light transmission layer for transmitting only blue light is disposed between the transparent color filter and the upper polarizer.
The method of claim 14,
Wherein the backlight unit emits blue light.
The method of claim 14,
Wherein the plurality of metal wirings are arranged at intervals of 100 nm or less.
The method of claim 14,
Wherein the upper polarizer has a thickness of 5 to 10 占 퐉.
The method of claim 14,
Wherein the upper polarizer comprises aluminum.
16. The method of claim 15,
Wherein the blue light transmitting layer includes at least two layers having different refractive indices.

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